Whether the design is for a 240V AC,400 ampere system; a 600V AC, 4000ampere system; or something inbetween, Siemens Switchboards shouldbe considered. Every aspect of designhas been aimed at improving layout con-venience, reducing installation costs, andminimizing the impact and cost of sys-tem changes. These switchboards pro-vide the rugged construction and serviceflexibility necessary in systems for indus-trial plants, hi-rise complexes, hospitals,and commercial buildings, and are built toUL-891 and NEMA PB-2 standards.
Type SB1 for Limited SpaceApplications
The SB1 switchboard has been specifi-cally designed for those applicationswhere floor space is at a premium. Therear of all sections align so the switch-board can be installed against a wall. TheSB1 contains front-connected main pro-tective devices and through-bus ratingsup to 2000 amperes at 600V AC.
Type SB2 for Increased Service andMore Load Cable Room
Siemens SB2 switchboard can have extradepth behind the vertical bus in each dis-tribution section, and contains main pro-tective devices and through-bus rated upto 4000 amperes at 600V AC. The rear ofall sections align as a standard. Front andrear alignment is available as an option.
Type SB3 For Custom Options
The SB3 switchboard is available withmain bus up to 6000 amperes. All sec-tions are front and rear aligned. Optionsinclude, but are not limited to, incomingand outgoing busway, SiemensACCESS™ System communications,aand cold sequence utility C.T.Compartments.
Type RCIII Rear ConnectedSwitchboards
The RCIII switchboard differs from theSB3 switchboard primarily in the mount-ing of the devices in the distribution sec-tion. The branch and feeder devices areindividually mounted. Because of thismethod of mounting, access to outgoingcable terminations must be from the rearof the switchboard. Bus bar extensionsfrom the feeder devices are run back tothe rear of the unit for easy access.
The front and rear of all sections align,designed for mounting away from thewall. RCIII switchboards will accommo-date systems up to 6000 amperes, 600volts maximum in any three-phase three-wire or three-phase four-wire configura-tion. The main bus can be specified for600 to 6000 ampere rating. Main devicesand bus ties are available up to 5000amperes, branch devices up to 2000amperes. As with Type SB3, the RCIIIswitchboard can be of indoor or outdoorNEMA 3R construction.
Switchboard Distribution Sections
All standard distribution sections are 90 in.(2286) mm) high and 38 in. (965 mm)wide. Optional height of 70 in. (1778 mm)and optional width of 32 in. (813 mm) and46 in. (1168 mm) are also available. SB1 distribution sections are 20 in. (508 mm) deep. For deeper sections, SB2and SB3 switchboards must be chosen.SB2 distribution sections have a standarddepth of 20 in. (508 mm) but can also bespecified in depth of 28 in. (711 mm) and38 in. (965 mm) when additional space isrequired. Rear access is required to makeuse of the additional depth of the SB2 andSB3 switchboards, and to provide accessto bus connections, where required. SB2may be installed against a wall. a See Section 1 of this Guide for a complete discussion of
Siemens ACCESS™ system.
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Type SB1 Switchboard Pictorial
Type SB2 Switchboard Pictorial
Whether the design is for a 240V AC,400 ampere system; a 600V AC, 4000ampere system; or something inbetween, Siemens Switchboards shouldbe considered. Every aspect of designhas been aimed at improving layout con-venience, reducing installation costs, andminimizing the impact and cost of sys-tem changes. These switchboards pro-vide the rugged construction and serviceflexibility necessary in systems for indus-trial plants, hi-rise complexes, hospitals,and commercial buildings, and are built toUL-891 and NEMA PB-2 standards.
Type SB1 for Limited SpaceApplications
The SB1 switchboard has been specifi-cally designed for those applicationswhere floor space is at a premium. Therear of all sections align so the switch-board can be installed against a wall. TheSB1 contains front-connected main pro-tective devices and through-bus ratingsup to 2000 amperes at 600V AC.
Type SB2 for Increased Service andMore Load Cable Room
Siemens SB2 switchboard can have extradepth behind the vertical bus in each dis-tribution section, and contains main pro-tective devices and through-bus rated upto 4000 amperes at 600V AC. The rear ofall sections align as a standard. Front andrear alignment is available as an option.
Type SB3 For Custom Options
The SB3 switchboard is available withmain bus up to 6000 amperes. All sec-tions are front and rear aligned. Optionsinclude, but are not limited to, incomingand outgoing busway, SiemensACCESS™ System communications,aand cold sequence utility C.T.Compartments.
Type RCIII Rear ConnectedSwitchboards
The RCIII switchboard differs from theSB3 switchboard primarily in the mount-ing of the devices in the distribution sec-tion. The branch and feeder devices areindividually mounted. Because of thismethod of mounting, access to outgoingcable terminations must be from the rearof the switchboard. Bus bar extensionsfrom the feeder devices are run back tothe rear of the unit for easy access.
The front and rear of all sections align,designed for mounting away from thewall. RCIII switchboards will accommo-date systems up to 6000 amperes, 600volts maximum in any three-phase three-wire or three-phase four-wire configura-tion. The main bus can be specified for600 to 6000 ampere rating. Main devicesand bus ties are available up to 5000amperes, branch devices up to 2000amperes. As with Type SB3, the RCIIIswitchboard can be of indoor or outdoorNEMA 3R construction.
Switchboard Distribution Sections
All standard distribution sections are 90 in.(2286) mm) high and 38 in. (965 mm)wide. Optional height of 70 in. (1778 mm)and optional width of 32 in. (813 mm) and46 in. (1168 mm) are also available. SB1 distribution sections are 20 in. (508 mm) deep. For deeper sections, SB2and SB3 switchboards must be chosen.SB2 distribution sections have a standarddepth of 20 in. (508 mm) but can also bespecified in depth of 28 in. (711 mm) and38 in. (965 mm) when additional space isrequired. Rear access is required to makeuse of the additional depth of the SB2 andSB3 switchboards, and to provide accessto bus connections, where required. SB2may be installed against a wall. a See Section 1 of this Guide for a complete discussion of
Siemens ACCESS™ system.
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Type SB1 Switchboard Pictorial
Type SB2 Switchboard Pictorial
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RCIII Switchboard –– Fixed MountedDevices
RCIII Switchboard –– Drawout MountedDevices
Switch-boardType
InstallAgainstWall?
SB1
SB2
SB3
RCIII
to 2000 Front Front YesYesNoNo
FrontRearRear
FrontFrontRear
to 4000to 6000to 6000
Main Bus AmpereRating Connected Access
Table 7.1 General
a Distribution section with two high 800 or 1200AVacu- Break is 28 in. (711 mm) deep.
b Distribution section with two high bolted pressureswitch is 38 in. (965 mm) deep minimum.
c
d
e
Width depends on branch device. See page 128.Fixed mounted only.Drawout or fixed mounted.
Switch-boardType
Molded CaseCircuitBreakerFixed
Vacu-BreakFusibleSwitchFixed
BoltedPressureFusible SwitchFixed
HCPFusibleSwitch
InsulatedCaseBreaker
LVPowerCircuitBreaker
SB1
SB2
SB3
RCIII
Yes
Yes
Yes
Yes
400-2000A400-1200A400-3200A400-1200A400-3200A400-1200A400-3200A
Yes
Yes
YesNo
800-1200A400-600A400-1200A400-600A400-1200A400-600A400-1200A
400-1200A400-1200A400-1200A400-1200A400-1200A400-1200A400-1200A
800-2000A—800-4000A—800-4000A—800-4000A
—
800-4000A d
800-5000A e
800-5000AFixed /Drawout
—
—
—
800-4000ADrawout
Table 7.2 Main Devices
Mounting
Individual Panel
Switch-boardType
Molded CaseCircuitBreakerFixed
Vacu-BreakFusibleSwitchFixed
BoltedPressureFusible SwitchFixed
HCPFusibleSwitch
InsulatedCaseBreaker
LVPowerCircuitBreaker
SB1
SB2
SB3
RCIII
NoYes
Yes
Yes-Rear
15-1200A—15-1200A400-3000A
15-1200A100-2000A
Yes
Yes
YesNo
30-600A800-1200A30-600A800-1200A
30-600A100-1200A
400-1200A400-1200A400-1200A400-1200A
400-1200A400-1200A
———800-4000A
—800-4000A
———
—
800-2000A e—
800-4000AFixed /Drawout
——
—
800-1600ADrawout
Table 7.3 Branch Devices
Mounting
Individual Panel
Switch-boardType
SB1
SB2
SB3
RCIII
Front
Front
Front &Rear
Rear
—90 (2286) 38 (965) 32 or 46(813 or 1168)
20 (508) —
—90 (2286) 38 (965) 32 or 46(813 or 1168)
20 (508) a 28 or 38(711 or 965) a
70 (1778)90 (2286) 38 (965) 32 or 46(813 or 1168)
20 (508) a b 28, 38, 48, or 58(711, 965, 1219 or 1473) a b
70 (1778)90 (2286) 25, 32, 38,(635, 813,or 965) c
32 or 46(813 or 1168)
48 or 58(1219 or 1473)
—
Table 7.4 Distribution Sections
Height Width Depth
Dimensions in inches (mm)
Access Std. Opt. Std. Opt. Std. Opt.
—
—
—
—
Service SectionsBussed or Non-Bussed Pull Sections
With Siemens switchboards, a non-bussed pull section, or a cross-bussedpull section for underground feed can be selected. The unique cross-bussedsection permits cable to be run straightfrom underground to the bus bars at thetop of the section. Non-bussed pull sec-tions have openings for carrying theunderground feed cables to the servicesection bus.Typical switchboards consist of a servicesection, and one or more distribution sec-tions. Service sections can be fed directlyfrom overhead by cable or busway.When fed from underground, a separatepull section is usually added. The servicesection is then fed from the adjacentunderground pull section. Bolted Pressure Switches, Vacu-Break®
and HCP Switches equipped for bottomfeed will accept cable directly fromunderground into the service section.
Service Section Options UtilityMetering
In addition to the main disconnect, theservice section usually contains utilitymetering provisions. ”Hot“ metering(CT‘s on the line side of the main discon-nect) is normal, but ”cold“ metering pro-visions (CT‘s on the load side of the maindisconnect) can also be furnished. Whether hot or cold metering is required,the CT’s provided by the utility companywill be mounted in a completely separatecompartment. The compartment will bebuilt to utility company standards, withhinged doors and provisions for meteringequipment provided by the utility.
Customer Metering
The service section often provides space for many user instrument require-ments. Ammeters, voltmeters, and theirassociated selector switches can bemounted in the service section along
with the main disconnect. A separatesection would be needed only if a largeinstrument or an unusual number ofinstruments were required.
Main Disconnect OptionsMain protective devices can be mountedindividually for quick access in an emer-gency. Switchboards will accommodate avariety of main protective devices.Selection depends on the characteristicsof each electrical system.
Type RL Power Circuit Breakers
Power circuit breakers, 800 – 5000amperes, 600 volts AC, with solid-stateovercurrent trip devices offer stored-energy tripping plus optional ground faultprotection, selective tripping, and a broadrange of accessories.
Type SB Encased Systems Breakers
Insulated case circuit breakers, 800 – 5000amperes, 600 volts AC, with solid-statetrip devices, offer stored energy trippingplus optional ground fault protection,selective tripping, and a broad range ofaccessories.
Molded Case Circuit BreakersHeavy Duty
Standard interrupting capacity, thermal-magnetic breakers, 400 – 2000 amperes,600 volts AC, provide protection thatallows “immediate restoration of power”for normal system requirements. A widerange of accessory options is available,including shunt trip, motor operator, auxil-iary switches, alarm switches, and others.
Extra Heavy Duty Breakers
High-interrupting-capacity thermal-magnetic breakers, 400 – 2000 amperes,600 volts AC, provide increased protec-tions where high available fault currentsexist, with the same convenience andaccessory feature offered in standardinterrupting capacity breakers.
Solid-State Sensitrip®
Full function breakers 400 – 3200amperes, 600 volts AC, have solid-statecircuitry which assures minimal damagethrough the quick interruption control offault currents, and includes short-timedelay and ground fault trip for branchdevice coordination.
Fuseless Current Limiting
Molded case breakers, 400 – 1600amperes, 600 volts AC, with thermal-magnetic protection provide coordinatedprotection for branch devices and circuitswhere extremely high fault currents areavailable. Solid state current limitingmolded case breakers also available inratings of 400 – 1600A.
Fusible Switches
Vacu-Break® Fusible Switches, 400 – 1200amperes, 600 volts AC, provide protec-tion, coordination with branch protectivefusible switches, and application flexibilityin systems where high available fault currents are encountered.
HCP Fusible Switch
HCP switches, 400 – 1200 amperes, 600 volts AC, combine economy withextremely high interrupting capacity inconjunction with Class J and Class Lfuses. Has visible contacts and optionalauxiliary contacts, shunt trip and groundfault relaying.
Bolted Pressure Switches
Bolted pressure switches, 800 – 4000amperes, 480 volts AC, combine econ-omy with extremely high interruptingcapacity in conjunction with Class Lfuses. Options include short trip, groundfault relaying, and a wide range of otheraccessories.
Ground Fault Relays
All main protective devices, except Vacu-Break fusible switches, can beequipped with ground fault relays tocomply with the National Electrical Code(Section 230-95) ground fault protectionrequirements.
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Type RL, LV Power Circuit Breaker
Customer Metering Compartment
Type SB Encased Systems Breaker
Bus Bars Design
Siemens switchboard bus bars are avail-able in standard tin-finished aluminum oroptional silver-finished copper. Standardbus is sized to limit heat rise to 65°Cabove an ambient temperature of 40°Cmaximum in accordance with UL 891.As an option, conductor material can besized according to density limits, basedon bus material. The applicable limits are:Aluminum — 750 amperes / sq. in.Copper — 1000 amperes / sq. in.In accordance with NEMA and UL 891standards, at each distribution section,the through-bus capacity is reduced asload is taken off. The through-bus istapered to a minimum of one-third theampacity of the incoming service mains. If required by special system characteris-tics, switchboards can be supplied withoptional full-capacity bus; i.e., the ampac-ity of the through-bus remains at the fullampacity of the main throughout theswitchboard.
Splice Plates
All splice plates can be accessed, bolted,and unbolted from the front of theswitchboard to make connection of adjacent sections easy. Each splice plateis attached with one 1/2-inch grade 2bolt, and a 2-inch or 3-inch Belville washer on each end. This reduces instal-lation time while increasing contact pressure at the joint. To make installation and servicing of thesplice plates easier, all phase and neutralthrough-busses are stacked one abovethe other, eliminating the need to stuffbolts in between bus bars that arestacked one behind the other in thesame horizontal plane.
Disconnect Links in Service EntranceEquipment
In switchboard service sections to beused as service entrance equipment on1Ø3W and 3Ø4W systems, provisionsmust be included to isolate the neutralbus from the grounded service neutral.This removable link gives you the abilityto check branch neutral continuity on theload side of the main disconnect. To maintain a service ground to theswitchboard frame while the neutral link is removed, a bonding strap is con-nected from the switchboard frame tothe neutral bus on the line side of theremovable link. UL and “SUSE” (suitable for use as ser-vice entrance) labels will be furnished on
service sections specified for serviceentrance.
Cable Terminals
Screw mechanical connectors (lugs) areprovided as standard equipment on alldevices. However, compression connec-tors are available as an option on all mainlugs, main bolted pressure switches,main power circuit breakers, mainmolded case, main fusible devices, andmain insulated case circuit breakers.
Distribution Sections
Siemens switchboard distribution sec-tions are engineered for accessibility andexpanded use. For expanded wiring roomand exceptional accessibility, generoustop and bottom gutters have been cre-ated by locating through-bus in the rearcenter of the distribution section. In cableentrance sections, no obstructions areless than 8 in. (203 mm) above the floor,and no live bus bars are located less than10 in. (254 mm) off the floor. So there isplenty of room to run cables into the dis-tribution section for connections. Standard bolted gutter covers give com-plete access to load conductors. Optionalhinged gutter covers can be furnishedwhere quick access to load connectors isdesired. Heavy channels form a rigid ring at thebase and top of each section, and heavygauge structural members are used forthe vertical corner posts eliminatingencroachment of additional bracing intothe top and bottom gutter areas. To provide additional room for top loadcable routing where needed, pull boxextensions are available in heights of10,15, 20, 25, and 30 in. (254, 381, 508,and 762 mm) to mount on any standarddistribution section. Top plates on all sec-
tions are easily removed in the field fordrilling, punching, and cutting conduitentry holes. Because all distribution sections canaccommodate any combination of panel-mounted branch devices, includingmolded case circuit breakers, Vacu-Breakfusible switches, and motor starters,future system modifications are easier to handle without adding switchboardsections. To make additional distribution sectionseasier to install when they are necessary,the through-bus in each distribution sec-tion is extended, and the end is pre-drilled to accept splice plate bolts. To adda section to an existing switchboard, setthe new section flush against the side ofthe existing distribution section, and bolttogether the bus bar splice plates.
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Bus Bars and Lug Construction Splice Plates
Screw Mechanical Connectors
Distribution Sections (cont’d)
Distribution sections of SB1, SB2, andSB3 switchboards can accept any combi-nation of molded case circuit breakersand fusible switches. If the system callsfor a mixture of these devices, there isthe option of grouping the devices in logi-cal patterns within a single section. Aseparate section is not needed for eachtype of device. And because all types ofdevices can be put in a single section,the total number of sections required inthe system can be reduced. For future modifications, devices can beadded or replaced as the system growsand changes. If a motor starter has to beadded after the installation, an entireswitchboard section need not be providedto house it. It can be installed in any distri-bution section with available unit space.
Operating Temperatures
All distribution sections contain louversboth at the top and bottom to assurecool operation in accordance with ULStandard 891.
Bus Location
All through-bus to adjoining sections islocated in the rear center of the distribu-tion section. This design provides large,unobstructed wiring gutters at the topand bottom of each section. Wiring takesless time and costs less to install.
Motor Starter Switchboards
Type SB3 switchboards offer a completeline of group-mounted starters that pro-vide a compact and convenient methodof combining power distribution and control circuits in one location. Motor starter units are available with fullybussed circuit breaker or fusible Vacu-Break units, factory-wired on the loadside to full voltage, non-reversing startersto reduce installation time. Type A wiring is standard without termi-nal blocks. The fusible switch, circuitbreaker, or starter unit is factory wired;however, control and load cabling is connected by the installer directly ontothe starter. Type B wiring is available as an option.Control wiring is brought out to terminalblocks and identified. Starter load termi-nals are conveniently located near thevertical wiring gutters and adjacent tocontrol terminal blocks. No wiring exter-nal to the unit is furnished. Type C wiring is not available in motorstarter switchboards.
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Front Connected Switchboards, Type SB1
RClll Construction Details —Distribution Feeder SectionSiemens Type RClll switchboard differsfrom front connected switchboards pri-marily in the distribution section. Thebranch and feeder devices are individuallymounted. Because of this method ofmounting, access to outgoing cable ter-minations must be from the rear. Bus barextensions from the feeder devices arerun back to the rear of the unit for easyaccess.
Molded Case Circuit BreakersFixed or Plug-in Individually MountedDevices
This design consists of a front sectionwhere the distribution devices aremounted, a bus section in the center, anda cable termination area in the rear. Thefront metal cover represents a groundedprotection for the operator at the front ofthe switchboard. The main through-busruns near the bottom of the switchboard.Section bus risers from the main bus arelocated in the center of the distributionsection with taps to branch breakers. The load side terminals of each frontmounted device are extended throughthe bus compartment into the rear cablecompartment. These bus extensions areinsulated where necessary as they pass
the main bus bars. Additional protectioncan be provided with optional barriersbetween devices and bus compartment,between individual devices, between busand cable compartment, and between
vertical sections. For further information on Siemensmolded case circuit breakers, see Section 17.
Type SB EncasedSystems BreakersDrawout or Fixed Mounted Devices
Insulated case circuit breakers are individ-ually mounted in their own compart-ments as standard. Metal barriers areprovided at the sides of each compart-ment and an insulation horizontal barrieris located between breakers in the samevertical section. Access is providedthrough a removable cover on fixedmounted breakers and a hinged accessdoor on drawout breakers.The insulated case circuit breaker draw-out assembly is a self-contained, integralunit that permits quick circuit breakerreplacement or inspection and mainte-nance of breakers without de-energizingthe entire switchboard. The easily acces-sible and maintainable spring loaded pri-mary disconnect fingers are mounted onthe breaker. The drawout assembly con-sists of a stationary frame and a movablecarriage to support the breaker. The sec-ondary disconnects for accessory controlcircuits are mounted on the movable car-riage. A matching set is mounted on the
stationary frame. The drawout design ofinsulated case circuit breakers makes itpossible to place the breaker in a fullywithdrawn, disengaged test, or engagedposition. The load side of each breakerhas bus bars extending into the rear cable
compartment. Additional protection canbe provided with optional barriersbetween the bus and cable compartmentand between vertical sections. For furtherinformation on Siemens SB breakers, seeSection 16.
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Front View
Type RClll Switchboard with Individually Mounted Molded Case Circuit Breakers
General
Rear View
Type RClll Switchboard with SB Encased Systems Breakers.
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Type RL Low Voltage Power Circuit Breakers
Incoming Service and Distribution Feeder Section for Type RL Drawout LV Power Circuit Breakers.
Front View of Incoming Service andDistribution Feeder Section
Rear View of Bus and Cable Compartmentof Feeder System –– Barriers Installed
Rear View of Bus and Cable Compartmentof Feeder System –– Barriers Removed
Rear ViewFront View
Distribution Feeder SectionType SB Encased Systems Breakers
TransformerConnection
Distribution Feeder Section
Drawout low-voltage power circuit break-ers are also individually mounted in theirown compartments as standard. Metalbarriers are provided at the sides and rearof each compartment and a horizontalmetal barrier is located between breakersin the same vertical sections. Access isprovided through a hinged metal door oneach breaker compartment.
Safe Closed-Door Drawout Mechanism
The low voltage power circuit breakercan be moved from “connect” through“test” to “disconnect” position withoutopening the door. In the “connect” posi-tion, both the primary and secondary dis-connects are engaged. In the “test”position, the primary disconnect termi-nals are disengaged; however, the sec-ondary disconnects are maintained topermit operation of the circuit breaker. Inthe “disconnect” position, the primaryand secondary disconnects are disen-gaged and separated a safe distancefrom the corresponding stationary termi-nals. In the “fully withdrawn” position,both primary and secondary contacts aredisconnected and the circuit breaker maybe inspected or removed for more com-plete accessibility. The load side of each breaker has busbars extending from the rear of the primary disconnect through the bus com-partment into the rear cable compart-ment. Additional optional barriers can beprovided between bus and cable com-partments and between vertical sections.
Testing
Testing conducted by Siemens includesboth production testing of switchboardsections for compliance with UL require-ments, and developmental, design verifi-cation, and quality control testing. Production tests check structural integrityand are performed on all switchboard sec-tions in accordance with UL procedures.A test voltage equal to twice the ratedvoltage plus 1000 volts (Vt = 2Vr + 1000)is applied for one minute to each switch-board section to check the integrity of theconductor and insulator materials, and theswitchboard assembly. These tests areperformed routinely to verify properequipment fabrication and assembly.
For more sophisticated design verificationand developmental testing a separate lab-oratory is used. This test lab is fullyinstrumented for advanced, multi-phaseelectrical test work over a wide range ofsystem conditions. Among the tasks performed is the deter-mination of heat rise at busway con-nections, and at protective deviceterminations on both line and load sides. All heat rise tests are conducted in strictaccordance with applicable UL standards.Heat rise data from the tests are care-fully compared to UL allowable levels.
Another important laboratory program isthe systematic verification of short circuitwithstand capabilities for all switchboardconductor materials. Switchboard bushas been thoroughly tested and is ULshort circuit withstand rated (UL File #E-22578). Switchboard sections withdesigns conforming to test specificationswill carry a label noting the short circuitcurrent withstand rating applicable to thatsection. For additional information onSiemens RL breakers, see pages 54-61.
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Type RCIII Cutaway Side View
Type RL Low Voltage Power Circuit Breakers (cont’d)
MeteringUtility Metering
Requirements for power company meter-ing and instrument transformer require-ments vary with serving utility. Typically,utility company current transformersrequire a 30 in. (762 mm) high compart-ment in SB1, SB2, SB3, and RCIII con-struction. Service sections meet mostutility metering standards.
Customer Metering
A full compartment of switchboard instru-ments with appropriate current trans-formers, potential transformers andselector switches are available in allSiemens switchboards. The meters and instrument switches aremounted on hinged panels with potentialtransformers and fuses behind the door.Current transformers are mounted on themain bus or, in the case of branch feedermetering, at the load terminals of thebranch protective device and normally donot require additional unit space.
4300, 4700 and 4720 Power Meters
The 4300 PowerMeter is provided as a standard meteringoption for SB1, SB2, SB3, and RCIIIswitchboards. Alter-nate metering optionsfor SB3 and RCIIIinclude the higher
accuracy 4700 Power Meter or analogmetering equipment if specified. The4300, 4700 and 4720 Power Meters aremicroprocessor-based, three-phasemeters that provide advanced features atan affordable price. These meters aredesigned as an alternative to full-featureddigital instrumentation packages, provid-ing highly accurate, reliable, transientsurge and hipot-withstand capabilities.Voltage and amperage measurementsare true RMS, including harmonics. The 4300, 4700 and 4720 Power Meterscan be configured to operate in Wye(Star), Delta, or single-phase voltagemodes. The meter is equipped to monitor
the measurements shown in Table 7.5.The display module has a high visibility,liquid crystal display (LCD). Functions but-tons display measured data, includingvolts, amperage, power function, all threevoltage and amperage phases. Replacing analog meters and selectorswitches, the two-module design simpli-fies wiring and reduces installation time.This makes the Power Meter ideallysuited for economical metering on three-phase industrial and commercial switch-boards. A communications port allowsthe power meter to be used as a stand-alone power monitoring station or as oneelement in a large energy-managementnetwork.When used as part of a SiemensACCESS installation, the 4300, 4700 and4720 Power Meters can communicatewith up to 128 ACCESS-compatibledevices. Using a direct PC connection ora dial-up modem, the module interfaceswith Siemens SIEServe™ on-line soft-ware that monitors any ACCESS compo-nent on the electrical distribution system.
Ammeters and Voltmeters (Analog)
Ammeters are switchboard type with±1% accuracy, 0 to 6000 amperes maxi-mum. The included instrument switchwill provide positions to read each phaseand will include an OFF position. Paneltype ammeters with ±3% accuracy, 800ampere maximum, can be furnished forbranch feeder metering to conservepanel space.Voltmeters are switchboard type with±1% accuracy, 0 to 600 volts AC. Theincluded instrument switch provides posi-tions to read each phase-to-phase voltageand each phase-to-neutral voltage, andhas an OFF position.
Current Transformers / PotentialTransformers
Potential transformers are recommendedwherever the system voltage exceeds150 volts AC phase-to-neutral to lowervoltage levels for instrument switchesand meters mounted on the switchboardfront panel.
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System Volts C/T P/T Scale C/T C/T P/T C/T C/T C/T C/TP/T P/T P/T P/T P/T P/TP/T
1Ø3W 120/240
240
480
120/240
120/208
277/480
3Ø3W
3Ø4W
222333
——2
——3
0-3000-3000-6000-3000-3000-600
2 ——2
———
———333
—————2
————33
—————3
222333
—222
—2
222333
— 111111
— ——1
——1
—22
——2
22222
222
—2
22
———
Table 7.5—Number of CT's and or PT's required for Typical Meters Applied on Selected System Voltages
Ammeter Voltometer 2 Element 2.5 Element 3 Element Wattmeter VarmeterPower Fac-tory Meter
FrequencyMeter
Synchro-scope
Watthour Meters
4 digit 4 digit 5 digit / 8 characterindicator
Siemens 4300 and 4700 Power Meters
MeteringFeatures
Phase currentsAvg. phase currentAmpere demandPhase voltagesAvg. phase voltageLine voltagesAvg. line voltagekWkVAkVARkW demandkW hourskVAR hoursPower factorFrequency Hz
± 0.5%± 0.5%N/A± 0.5%± 0.5%± 0.5%± 0.5%± 1.0%± 1.0%± 1.0%± 1.0%± 1.0%N/A± 2.0%
0.2Hz
± 0.2%± 0.2%± 0.2%± 0.2%± 0.2%± 0.2%± 0.2%± 0.4%± 0.4%± 0.4%± 0.4%± 0.4%± 0.4%± 1.0%
0.2Hz
Table 7.6—Power Meter Features
Power Meter Accuracy
4300 4700 4720
100:5150:5200:5300:5400:5500:5
600:5800:5
1000:51200:51500:52000:5
2500:53000:54000:55000:56000:5
Table 7.7 Available CT Ratios —Ampere Rating
± 0.2%± 0.2%± 0.2%± 0.2%± 0.2%± 0.2%± 0.2%± 0.4%± 0.4%± 0.4%± 0.4%± 0.4%± 0.4%± 1.0%
0.2Hz
See Section 1
Motor Control
J Standard Control PowerTransformers: 480 / 240 / 120 Volts AC
J Pushbutton: Two-Unit Start-Stop,Open-Close, Etc.
J Selector Switch: 1-Pole, Double-Throw (ON / OFF); 2-Pole, Double-Throw (hand / off / auto)
J Pilot Lights: Red or Amber (neontype); Green (incandescent type,includes auxiliary interlock);Transformer and Push-to-Test typePilot Lights Available
J Auxiliary Interlocks: Sizes 1–4J Control Relays (may increase mount-
ing height)
J Auxiliary Switch A or B Type forMolded Case Breakers (not availableon Vacu-Break units)
Application Note: Mounting Height ofFVNR Motor Starter Increases by 2.5 in.(64 mm) when Control Transformer isFurnishedMaster Control Power Transformersrequire individual starter secondary dis-connecting means (1996 NEC 430-74).
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Static Trip® III Microprocessor-BasedTripping
The Static Trip III tripunit comes in fourmodels for maximumflexibility. Table 7.9shows the functionsof the various models.(See pages 13, 56-57).
The parameters measured by the StaticTrip IIIC / CP trip units are shown inTable 7.11. For protective relay func-tions, Table 7.10 shows how the StaticTrip IIICPX trip unit can be used. Allcommunicating Static Trip III trip unitsinclude a local communication port thatsupports the breaker mounted displayunit or BDU. The BDU features a high-
visibility alphanumeric display. Real-timemetered values, min / max values, eventlog data and setpoint data can be readon the BDU in straightforward engineer-ing units. Alarm and relay setpoint canbe configured using the BDU keypad. For complete information on Type RLbreakers, see pages 54–61.
Type RL Low Voltage Power Circuit Breakers
NEMA Size FVNR
0, 1
Table 7.8
234
50 VA100 VA150 VA250 VA
Functions
Self-Powered Overcurrent ProtectionIIICP IIICPXIIIC
Static Trip III Model
III
Table 7.9—Static Trip III Trip Unit Functions
✓RMS Sensing ✓
——
——
————————————————
Switchable Thermal Memoryopt.
opt.opt.
Ground Fault Protection✓
LCD TargetProtective Microprocessor Watchdog ✓
✓
✓
✓✓
————
opt.
opt.opt.
opt.
opt.
opt.
✓
✓✓
✓✓✓✓✓✓
✓✓✓
✓✓✓
✓
✓
✓✓
——
opt.
opt.opt.
opt.
opt.
opt.
✓
✓✓
✓✓✓✓✓✓
✓✓✓
✓✓✓
✓✓✓
✓
✓✓
opt.
opt.opt.
opt.
opt.
opt.
✓
✓✓
✓✓✓✓✓✓
✓✓✓
✓✓✓
✓✓✓✓✓
✓
Pickup LEDsZone Interlocking a
Retrofit Universal Mounting PackageRS-485 Communications PortBreaker Display Unit Port b
Communications Microprocessor WatchdogComm Watch LEDBackup Shadow ProtectionTrip LogAlarm Relay Output a
Trip Unit Status IndicationBreaker Position IndicationBreaker Operation CounterCommunication Open/Close/Trip a e
Event LogPhase Current MeteringGround Current Metering c
Neutral Current Metering d
Min/Max Current LogPower Metering FunctionsMin/Max Power LogExtended Protective RelayingExtended Trip Log
Protective Function Setting Range
Current UnbalanceMainsGenerators
Typical Applications
Motors
Table 7.10—Static Trip IIICPX Protective Relay Functions
✓Voltage Unbalance ✓Overvoltage
✓Undervoltage—
Reverse PowerOverfrequency —
—
—
✓
✓
—✓
✓✓
✓
✓
—
——
—
—
✓
Underfrequency
5–50%5–50%60–660V60–660V10–2000kW50.0–70.0Hz45.0–60.0Hz
a Requires additional wiring to meet specific application.b Supports optional Breaker Display Unit Accessory.c Included when ground fault protection specified.
d Requires “N” option and neutral current sensor.e Open command uses alarm relay output and restricts
use for other alarm functions. Close command requireselectrically operated breaker.
Pickup(X Sensor Rating)
Delay(Seconds)
2, 4, 6, 8,12, 15
No IntentionalDelay
G: Ground Fault
Pickup(% Ground Sensor)
Delay(Seconds)
20, 30, 40, 50, 60, .10, .25, .40
Pickup(X LT Setting)
Delay(Seconds)
2, 3, 4, 5,6, 7, 8, 12
.08, .15, .22
.30, 40I: Instantaneous
MeasuredParameters IIIC IIICP
Model
Phase Current
Table 7.12—Static Trip III Metering Functions
Avg. Phase CurrentsGround Current a
Neutral Current b
✓✓✓opt.——
✓✓✓
✓✓
— ✓
opt.Phase Voltages c
Avg. Phase Voltage c
Line Voltages— ✓Avg. Line Voltage— ✓kW— ✓kW Demand— ✓kW Hours— ✓kW Hours Reverse— ✓kVA— ✓kVAR— ✓kVAR Hours— ✓Power Factor— ✓Frequency
a Included when ground fault protection specified.b Requires “N” option and neutral current sensor.c Only displayed for four wire systems.
Setting a
(X Sensor Rating)Delay(Seconds @ 6X Setting)
T: Long Time
.5, .55, .6, .65, .7, .75,
.8, .85, .9, .95, 1.03.5, 6, 1017, 30
Table 7.11—Static Trip III Trip UnitSettings
S: Short Time
a Pickup is fixed at 1.1 times long time setting.
J Shunt TripJ Auxiliary Switches, up to 6 N.O. / N.C.J Undervoltage ReleaseJ Electronic “Bell Alarm” ModuleJ Electric Charging Motor Operator with
Electronic ControllerJ Integral Local Electric Close OptionJ Integral Kirk-Key Interlock on SBJ Close Blocking DeviceJ Trip Padlock Device J Position Padlock Device (Drawout)
J Cell Switches, 4 N.O. / N.C. (Mountedon Drawout Stationary Element)
J Automatic Safety ShuttersJ Kirk-Key Provision (Mounted on
Drawout Stationary Element)J Mechanical InterlockJ Capacitor Trip DeviceJ Remote Indication / Relay PanelJ Auxiliary Power Module (for bench-
testing trip unit)J TS 31 Universal Test Set For additional SB breaker information,
see Section 16.
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General
Frame AmpereRating (In)
200, 225, 250, 300, 350, 400400800 400, 450, 500, 600, 700, 800
600, 700, 800, 1000, 1200800, 1000, 1200, 16001000, 1200, 1600, 20001600, 2000, 25001600, 2000, 2500, 3000, 32002000, 2500, 3000, 3200, 40002500, 3000, 3200, 4000, 5000
1200160020002500320040005000
Table 7.13—Available Rating Plugs
Rating Plug Amperes (Ir)
Table 7.14—SB Breaker Trip Unit Ratings (Ir = Rating Plug Value; In = Frame Ampere Rating)
Long Time(T)
Pickup
Delay a (Sec.)
Pick up (xIr)
Delay (I2t) out b
Delay (I2t) in b
Pick up (xIr)
Fixed
400, 800, 1200
1600
2000
2500
3200
4000
5000
Delay (Fixed)
Delay (I2t)
Short Time(S)
Adjustable InstantaneousPick-up (I)
InstantaneousOverride c
GroundFault d
(G)
.5, .6, .65, .7, .75, .8, .85, .9, .95, 1.0
800–2000A
800–2000A
800–1200A
Available Setting (In)
2.5, 5.5, 8, 10, 14, 17, 21, 25, 30
1.5, 2, 2.5, 3, 4, 5, 6, 7, 8, 9
2500–5000A
2500–5000A
1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10
4000–5000A
65kA
1.5, 2, 2.5, 3, 4, 5, 6, 7, 8
3200A
50kA
2000A
35kA
.07, .1, .15, .2, .3 seconds
.07, .1, .15, .2, .3 seconds
25kA
25kA
20, 25, 30, 40, 50, 60, 70, 80, 90, 100
20, 26, 32, 38, 44, 50, 56, 62, 68, 75
20, 23, 27, 30, 35, 40, 45, 50, 55, 60
20, 23, 26, 29, 32, 35, 38, 41, 44, 48
20, 21, 23, 25, 27, 29, 31, 33, 35, 37
20, 21, 22, 23, 24, 25, 26, 27, 28, 30
Setting fixed at 1200A
.1, .2, .3, .4, .5 seconds @ .5 = In
.1, .2, .3, .4, .5 seconds @ .5 = Ina Current equal to 6 times Ir b Current equal to 8 times Ir c .500 seconds maximum d No trip point setting exceeds 1200 amperes
Current Setting (x Current Rating P/US)
Frame Amp Rating In
Frame Amp Rating
Frame Amp Rating
Frame Amp Rating
SB Trip Unit Static Trip III Trip Unit
a Replaceable Rating Plugs AdjustableFrom 50–100% of Frame Rating.
b Continuous Self-Diagnostic “Watchdog”c Integral Test Functions for Phase and
Ground Fault (Trip and No-Trip Tests)d External Power Source Allows Bench
Testing of Stand-Alone Trip Unite Plug-in Display Modules for Current and
Energy Display Capabilitiesf Long Time Continuous Current Settingg Long Time Delay Band Setting
h Short TIme Pickup Settingi Short Time Delay Band Settingj Instantaneous Pickup Settingk Integral LED Trip Indicatorsl Full Communications Capability Via
Siemens ACCESS Networkm LCD Targetn Thermal Memory Switcho Short Time I2t Ramp Switchp Zone Interlock Switch
q Zone Interlocking Input / Output and Future Options
r LCD Displays Key Padt Test Connector
Serial PortSystem Check LedsSystem Status Leds
SB Encased Systems Breakers
SB-EC Trip Unit
1
23
21
22
18
19
20
21
22
23
Molded Case Circuit BreakersJ Alarm Switch for remote indication
and / or pilot device operation whenbreaker is tripped automatically.
J Shunt Trip (electric open-manualclose) for remote tripping of breaker.Includes cut-off switch. Specify con-trol voltage.
J Undervoltage Trip automatically tripsbreaker when voltage is reduced35%–70% of coil rating. SpecifyControl Voltage.
J Auxiliary Switch 1A and 1B, 2A and2B, etc.
J Telemand Motor Operator (electricopen and close). Operating Voltage48V DC; 120, 240V AC.
J Ground Fault Relay (requires shunttrip).
Vacu-Break® FusibleSwitchesAll Vacu-Break fusible switches include:J Voidable Cover InterlockJ Quick-Make, Quick-Break OperationJ Positive ON / OFF ActionJ Padlockable Handle Design (at ON or
OFF)J Vacu-Break Arc Control (i.e., enclosed
arc chamber, double-break magneticarc blowout)
J Clampmatic Pressure Spring ForceOn Closed Contacts
J Spring-Reinforced Fuse Holders For 250V switches (30 to 600A):J Class R Rejection Type Fuse Holders
for all units except the 2.5 in. (64mm) high unit, which is suitable onlyfor NEC Class H, K1 and K5 fuses.
For 600V switches (30 to 600A):J Class R Rejection Type Fuse Holders
or Class J Fuse Holders.
Bolted Pressure SwitchesThese switches are suitable for use onsystems capable of delivering fault cur-rent up to 200,000 amperes symmetri-cal RMS when equipped with Class Lfuses. All bolted pressure switchesinclude:J Fuse Door InterlockJ Quick-Make, Quick-Break OperationJ Bolted Pressure Force on OperationJ Bolted Pressure Force on Closed
ContactJ Padlockable Handle (in the “open”
position only)
Accessories and modifications:J Shunt Trip (electrical open-manual
close)J 120V AC Standard Control VoltageJ Electrical Operator (electrical open
specify system voltage)J Ground Fault Relay (requires shunt
trip)J Blown Fuse Trip (switch opens when
any one fuse blows — requires shunttrip)
J Blown Fuse Indicating LightsJ Phase Failure Relay with Capacitor
Trip (detects failure of any one phaseand opens switch — requires shunttrip, specify system voltage)
J Auxiliary Contacts
HCP Fusible SwitchesRated 200,000 amperes RMS symmetri-cal when equipped with Class L fuses.Standard features include:J High Contact Silver Alloy ContactsJ Heavy Duty Quick-Make, Quick-BreakAccessories include:J Undervoltage Release —
InstantaneousJ Remote Spring Release ClosingJ Remote Trip SignalingJ Bell Alarm with LockoutJ Shunt Trip with Standard Control
Voltages of 120, 240, 480V AC;12, 24, 48 and 125V DC.
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MaximumAmpereRating
Available AmperageRange
Percentageof Max.Cont. Amps
MoreDetails onPage
BreakerFrame
Percentage of Max.
MaximumRange
Time inSeconds
60012001600
SJD, SLDSMD, SNDSPD
200-600600-1200
1200-1600
20-100%20-100%20-100%
40-600120-1200240-1600
20-70%20-70%20-70%
0.10-0.400.10-0.400.10-0.40
329-330
Table 7.15 Sensitrip® Breaker Adjustment Range Overview
Maximum ContinuousCurrent Range Ground Fault Range
Function
Continuous Ampere (Ir)
Long-Time Delay
Short-TimePickup
Short-TimeDelay
InstantaneousPickup
Ground FaultPickup
Ground Fault Delay
Performance
Table 7.16 Breaker Functions (In = Nominal Rating of Circuit Breaker)
Varies the level of current the circuit breaker will carry without tripping.Completely adjustable from 20 to 100% of breaker's continuous ampererating. (Ir = % of In) Referred to as the “overload” position, this function controls the breaker's“pause-in-tripping” time to allow low level, temporary inrush currents suchas those encountered when starting a motor to pass without tripping.Adjustable settings from 3 or 25 seconds at 6 x Ir are possible.Controls the amount of high current the breaker will remain closed againstfor short periods of time, allowing better coordination. Adjustable between1.5 to 10 times the continuous ampere setting of the circuit breaker (i.e.,adjustable from 1.5 to 10 times Ir).Controls the amount of time (from .05 to .2 seconds in fixed time, or .2 seconds at 6 x lr in the l2t ramp mode) a breaker will remain closed againsthigh fault current. This function is used in concert with the Short-Time Pickup function to achieve selectivity and coordination. (A pre-determinedoverride automatically preempts the setting at 10.5 times the maximumcontinuous ampere setting In.)Determines the level at which the circuit breaker trips without anintentional time delay. The instantaneous pickup function is adjustablefrom 2 to 40 times the continuous ampere setting (lr) of the breaker.(Anytime an overlap exists between the instantaneous and short-timepickup settings the instantaneous automatically takes precedence.)Controls level of ground fault current which will cause circuit interruptionto ocurr. Complies with National Electric Code, Article 230, Section 95(a)for maximum trip point settings. Adjustable from 20 to 70 percent of thebreaker's maximum continuous ampere setting (In).Adds a predetermined time delay to the trip point once ground fault pickuplevel is reached. Inverse l2t ramp is standard which provides better trippingselectivity between the main and feeder or other downstream breakers.
Molded Case CircuitBreakersNormal and Heavy Duty
Normal duty breakers are designed forcommercial, industrial, institutional andother heavy duty applications and ratedto 600 volts AC; 250 volts DC. HeavyDuty breakers have higher interruptingratings than normal duty.
Extra Heavy Duty
These are designed for heavy duty appli-cations where the interrupting require-ments exceed the ratings of heavy dutybreakers. They are rated up to 600 voltsAC and 250 volts DC.
Solid State Trip
Equipped with solid state tripping, andavailable in heavy duty and extra heavyduty interrupting ratings at 600V AC.
Current-Limiting
These breakers incorporate the exclusiveSiemens blow-apart interruption principleand meet the NEC requirements for cur-rent-limiting breakers. Current-limitingcircuit breakers can limit the let-throughl2t to a value less than the l2t of one-half cycle wave of the symmetricalprospective current without any fusibleelements when operating within theircurrent-limiting range.
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240V 480V 600V 250V a 500V a
100
125
225
400
100
125
225
250
400
600
800
1200
1600
2000
400
600
800
1200
1600
100
125
250
400
600
800
1200
400
600
800
1200
1600
125
250
400
600
800
1200
1600
400
600
800
1200
15-100
15-12560-225
200-400
15-100
15-125
60-22570-250
200-400250-600
500-800
800-12001200-16001600-2000
200-400200-400200-400
200-400
15-10015-12515-12560-22570-25070-250
200-400200-400200-600400-600500-800500-800
800-1200
— — — —
14,000 — — —
— — — —
—
—18,00025,000
—
35,000
50,000
35,000
—42,00065,000
— 65,000 100,000 65,000100,000
100,00065,000
65,000
65,000
65,000100,000
50,000
65,000
—
——
18,000—
22,000
25,000
25,000
50,000
—
30,000
5,000
30,000
—
30,000
—
—
—
——
18,000—
18,000
25,000
—
—— 30,000 —
25,000 — —— — —
25,000 30,000 25,000— —25,000
25,000
35,00050,000
50,000
— —
— —
30,000 25,000
50,000
35,000
50,000
30,000 35,000
30,000
—
50,000
—
BQHBLHBQDBLQJ2JXD2
ED2ED4ED6QJH2FXD6/FD6JXD6/JD6LXD6/LD6LMXD6/LMD6/MXD6/MD6NXD6/ND6PXD6/PD6RXD6/RD6
SJD6SLD6SMD6SND6SPD6
3200 2000-3200 STD6
HBLHED4HHED6QJ2-HHFD6HHFD6HJD6/HJXD6HHJD6/HHJXD6HLD6/HLXD6HHLD6/HHLXD6HLMD6/HLMXD6HMD6/HMXD6HND6/HNXD6
40-400 SHJD660-600 SHLD6
120-800 SHMD6160-1200 SHND6240-1600 SHPD6
3200 2000-3200 SHTD6SHHTD6
15-125 CED670-250 CFD6
200-400 CJD6400-600 CLD6500-800 CMD6
800-1200 CND61200-1600 CPD6
1600
800-1200
1200-1600 HPD6/HPXD62000 1600-2000 HRD6/HRXD6
40-400 SCJD660-600 SCLD6
120-800 SCMD6160-1200 SCND6
22,000
—
10,000
65,000
10,000
65,000
22,000
65,000
65,000
85,000
65,000
100,000
42,000100,000200,000100,000200,000100,000200,000
100,000
100,000
100,000200,000
100,000150,000
200,000
150,000
100,000
100,000
65,000
30,000 50,000
150,000 100,000
100,000 65,000— —
200,000
150,000
100,000
200,000
Table 7.17 Interrupting Ratings of Molded Case Circuit Breakers
MaximumAmpereRating
Available AmperageRange
BreakerType
Maximum Interrupting Capacity
Symmetrical RMS Amperes VAC In DC Amperes (VDC)
Normal Duty — Thermal-Magnetic
Heavy Duty — Thermal-Magnetic
Heavy Duty — Solid-State Trip
Extra Heavy Duty — Thermal-Magnetic b
Extra Heavy Duty — Solid-State Trip
Current-Limiting — Thermal-Magnetic
Current-Limiting — Solid-State Trip
35,000
Type JD / LD Extra Heavy DutySolid-State Trip
Type FD6, FXD6 Heavy DutyThermal-Magnetic Breaker
a All breakers are 2-pole for DC rating.b Extra heavy duty breakers are inherently fungus-proof
an do not require special fungus treatment.
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601, 700, 8001000, 12001500, 16001800, 2000 200,000250030003500, 40005000
800
1600
1200
2000
3000
2500
5000e
4000
1000, 1200
601,800
400
800
600
1200
AmpereRating
Fuse Class (Amperes)
Fuse InterruptingRating(Sym. RMS Amps)
1000, 1200
600,800—
—
400600
——
——
200,000
J Tf L
Table 7.22 HCP Fusible Switches
RL-800 30,000 30,000 30,000 75-800
NECStandardH, K1, K5
Class RRejectionType
RLE-800 42,000 65,000 42,000 75-800RLI-800 22,000 42,000 22,000 75-800RL-1600 50,000 65,000 50,000 75-1600RL-2000 65,000 65,000 65,000 75-2000RLE-2000 85,000 85,000 85,000 75-2000RLE-3200 65,000 85,000 65,000 600-3200
800-4000a
RK1, RK5
J
L
10,000
200,000
200,000
100,000 d
RL-4000 85,000 100,000 85,000
800-4000*a
RLE-4000 100,000 100,000 100,000 800-4000a
RL-5000 85,000 100,000 85,000 2500-5000
Voltage Rating Short Circuit RatingSymmetrical Current
Table 7.18 Type RL Low Voltage Power Circuit Breakers b Table 7.20 Vacu-Break® FusibleSwitches c
FrameSizeAmperes
800
1600
2000
3200
4000
5000
RL-800 30,000 30,000 30,000 75-800RLE-800 42,000 65,000 42,000 75-800RLI-800 22,000 100,000 22,000 75-800RL-1600 50,000 65,000 50,000 75-1600RL-2000 65,000 65,000 65,000 75-2000RLE-2000 85,000 100,000 85,000 75-2000RLE-3200 65,000 85,000 65,000 600-3200RL-4000 85,000 100,000 85,000 800-4000a
RLE-4000 100,000 100,000 100,000 800-4000a
RL-5000 85,000 100,000 85,000 2500-5000
800
1600
2000
3200
4000
5000
RL-800 30,000 42,000 30,000 75-800RLE-800 42,000 65,000 42,000 75-800RLI-800 22,000 100,000 22,000 75-800RL-1600 50,000 65,000 50,000 75-1600RL-2000
600
480
240and208
635
508
254
2200
2200
2200 65,000 65,000 65,000 75-2000
RLE-2000 85,000 100,000 85,000 75-2000RLE-3200 65,000 85,000 65,000 600-3200RL-4000 85,000 130,000 85,000 800-4000a
RLE-4000
RLF-3200 &RFC-3200Fuse Carriage
208to600
600RLF-4000 &RFC-4000Fuse Carriage
100,000 130,000 100,000 800-4000a
RL-5000 85,000 130,000 85,000 2500-5000
800
1600
2000
3200
4000
RLF-800RLF-1600 2200
2200
2200
2200
200,000
200,000
200,000
200,000
RLF-2000
2000- 5000
4000- 6000
6000
250-1600800-3000
4000
600- 3200
800- 3200
2500- 5000
75- 80075-160075-2000
800
2000
3200
4000
RLF-5000 &RFC-5000Fuse Carriage
5000
1600
5000
BreakerType
RatedVoltage
RatedMax.Voltage
Short TimeRatingSymmet-ricalAmperes
With Instant-aneousTripAmperes
WithoutInstant-aneousTripAmperes
Contin-uousCurrentRatingAmperes
MaximumInterruptingCapacity InSymmetricalRMSAmperes,240 to 600VAC
Max.AmpereRating
30to600
8001200
FuseClass
FuseHolder
Insul-ationLevelDielectricWith-standVolts
Voltage Rating ShortCircuitRatingsSymmetricalAmps
Table 7.19 Type RLF Fused Low Voltage Power Circuit Breakers b
TypeRatedVolts
RatedMax.Volts
FrameSizeAmperes
RangeOf FuseRatingsAmperes
ContinuousCurrentRatingAmperes
InsulationLevelDielectricWithstandVolts
RejectionType
Table 7.21 Bolted PressureSwitches. All 600V AC Maximum2 or 3 Poles
—
AmpereRating
Class LFuse Rating(Amperes)
Fuse InterruptingRating(Sym. RMS Amps)
a With the addition of fan cooling and 5000A coppermain bus, a 4200A continuous rating is available.
b For complete details on Siemens RL Power Breakers,see pages 54 to 62.All circuit breakers (and drawout fuses and carriage,if applicable) are UL listed.
c For further information on Vacu-Breaker switches,see pages 355 to 370.
d 200,000A max. on 800A switch with “L” or “T” fusesand 1200A switch at 240V with “L” fuses.
e 5000A bolted pressure switch not UL listed.f For use at 240V maximum system.
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200–400400–800
200–400
SBA
SBH
65,000
200,000
65,000
150,000
42,000
50,000
100,000
65,000
25,000
25,000
35,000
35,000
25,000
35,000
50,000
65,000
400
400
400–800800
600–12001200
800–16001600
1000–20002000
1600–25002500
1600–32003200
2000–40004000
2500–50005000
400–800800
600–12001200
800–16001600
1000–20002000
1600–25002500
1600–32003200
2000–40004000
2500–50005000
600–1200800
800–16001200
1000–200016002000
Maximum Interrupting CapacityIn Symmetrical RMS AmperesFor Voltage AC
Table 7.23 Type SB Encased Systems Breakersa
AvailableAmperageRange
BreakerType 240V 480V 600V
MaximumAmpereRating
Short TimeRatings InSymmetricalRMS Amperes(30 Cycles)
SBS 100,000 100,00065,000
85,000
a For complete details on Siemens SB Encased Systems Breakers, see pages 313 to 325.
114 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
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Sentron™ SwitchboardsPressure Wire Connectors
Technical
Table 7.24 Pressure Wire Connectors Table 7.24 Pressure Wire Connectors (cont’d)
BreakerType
ConnectorApplied toAmperageRange
Terminals are UL listed for 60/75°C conductors; CSA listed for copper wire only.a
Optional — use only in cases allowed by local codes.b
Use on load side only.c
This connector is of aluminum construction, but rated for copper cable only.d
200A — Apply this connector when continuous current setting is adjusted for lowerampacities.
e
CablesperConnector
Connectora
Wire RangesAvailable
Normal Duty — Thermal-Magnetic
Heavy/Extra Heavy Duty, Current-Limiting — Thermal-Magnetic
BQHBLHHBLBQD
BL
QJ2QJH2QJ2-H
JXD2
ED2ED4ED6HED4HHED6CED6
FXD6/FD6HFD6, CFD6HHFD6
JXD6/JD6HJD6/HJXD6HHJD6/HHJXD6CJD6
LXD6/LD6HLD6/HLXD6HHLD6CLD6
MXD6/MD6NXD6/ND6HND6/HNXD6CMD6, CND6LMD6, LMXD6HLMXD6
PXD6/PD6HPD6/HPXD6CPD6PXD6/PD6HPD6/HPXD6RXD6/RD6HRD6/HRXD6
15–30 1
1
1
1
1
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1-2 pcs.
1-2 pcs.
1-2 pcs.
1-2 pcs.
1-3 pcs.
1-3 pcs.
1-4 pcs.
1-5 pcs.
1-4 pcs.
1-6 pcs.
35–50
55–70
80–100
110–125
60–225
15–20
25
30–60c
1 Pole, CED6
30–60 c1 Pole, CED6
30–1252–3 Pole
30–100
70–250
110–125
200–400
200–400
250–600
500–600
700–800
800–1200
1200–1600
1600–2000
#14 - #6 AWG Cu#12 - #8 AWG Al#8 - #6 AWG Cu#8 - #4 AWG Al#8 - #4 AWG Cu#8 - #2 AWG Al#4 - #1/0 AWG Cu#2 - #1/0 AWG Al#2 - #1/0 AWG Cu#1/0 - #2/0 AWG Al#6 AWG - 250 kcmil Cub
3/0 - 500 kcmil Cu
4/0 - 500 kcmil Al
3/0 – 600 kcmil Cub
500 – 600 kcmil Cub
600 – 750 kcmil Cub
600 – 750 kcmil Alb
#1 AWG- 350 kcmilb
#1/0 AWG-500 kcmilCu or Al
250 – 400 kcmil Cub
500 – 750 kcmil Cub
250 – 400 kcmil Alb
500 – 750 kcmil Alb
300 – 600 kcmil Cu or Al b
300 – 600 kcmil Cu or Al
750 kcmil Alb d
250 – 500 kcmil Cu or Al
300 – 600 kcmil Cu or Al
500 – 750 kcmil Alb
3/0 - 500 kcmil Cub
4/0 - 500 kcmil Al
#6 AWG - 250 kcmil Cu#6 AWG - 350 kcmil Cu b
#4 AWG - 350 kcmil Al
#1 AWG - 500 kcmil Cu or Al
#6 AWG - 300 kcmil Cu#4 AWG - 300 kcmil Al#6 AWG - 300 kcmil Cu#4 AWG - 300 kcmil Al
#14 - #10 AWG Cu#12 - #10 AWG Al#10 AWG Cu. or Al
#10 - #4 Cu. or Al
#10- #1/0 AWG Cu. or Al
#4- #1/0 Cu. or Al
#3/0 - 3 Cu#2/0- 1 Al
#10 - #3/0 Cu. Only
BreakerType
ConnectorApplied toAmperageRange
CablesperConnector
Connectora
Wire RangesAvailable
Heavy / Extra Heavy Duty, Current-Limiting — Solid-State Trip
SJD6, SHJD6SCJD6
SLD6, SHLD6SCLD6
SMD6, SHMD6SCMD6SND6, SHND6SCND6
SPD6 / SHPD6
STD6 / SHTD6 /SHHTD6
200–400e 1-2 pcs.
1-2 pcs.
1-2 pcs.
1-3 pcs.
1-4 pcs.
1-4 pcs.
1-5 pcs.1-4 pcs.d
250–600e
500–600
700–800
800–1200
1200–1600
2000
3/0 - 500 kcmil Cu4/0 - 500 kcmil Al3/0 - 500 kcmil Cu
250 – 500 kcmil Cu or Al300 – 600 kcmil Cu or Al750 kcmil Cu or Al b
1-6 pcs. 250 – 600 kcmil Cu or Al
4/0 - 500 kcmil Al
4/0 - 750 kcmil Al or Cu f
#1 AWG - 500 kcmil Cu or Al
#1/0 AWG - 500 kcmil Cu or Al
30 60
100 200 400 600 800
1200
#14 - #4 AWG#14 - #4 AWG#1/0 AWG#6 AWG - 350 kcmil#4/0 AWG - 500 kcmil#4/0 AWG - 500 kcmil#4/0 AWG - 500 kcmil#4/0 AWG - 500 kcmil
Cu or AlCu or AlCu or AlCu or AlCu or AlCu or AlCu or AlCu or Al
Table 7.25 Vacu-Break Fusible Switches
AmpereRating
Cables per Connector
Cables per Connector
WireRange Type
30 (2.5 in.)(64 mm)
(Branch Connectors)
#14 - #8 AWG Cu1
11112234
400 – 600 2 #1 AWG-500 kcmil Cu or Al400 – 600 2 #1 AWG-500 kcmil Cu only400 – 800 3 #1 AWG-500 kcmil Cu or Al400 – 800 3 #1 AWG-350 kcmil Cu only800 – 1200 4 #1 AWG-500 kcmil Cu or Al800 – 1200 3 #250-500 kcmil Cu only
Table 7.26 HCP Fusible Switches
AmpereRating
Cables per Connector
WireRange Type
(Branch Connectors)
Table 7.27 Fusible Bolted Pressure Switchesf
AmpereRating
WireRange Type
(Branch Connectors)
#4/0 AWG - 750 kcmil#4/0 AWG - 750 kcmil#4/0 AWG - 750 kcmil#4/0 AWG - 750 kcmil
800120016002000
Cu or AlCu or AlCu or AlCu or Al
2466
Table 7.28 Starters and Contactors (Lug Data)
NEMA Size Lugs per Pole Wire Range Type
#14 - #8 AWG#14 - #4 AWG#14 - #1/0 AWG
00-123
Cu OnlyCu OnlyCu/Al
111
3200
Not available with breaker or switch. Requires bussing to install.f
Service entrance switchboards oftenrequire that a utility current transformercompartment be included. The NationalElectrical Manufacturer’s Association(NEMA) has created a section coveringutility C.T. compartments for inclusion inPB-2, the existing standard for switch-boards. Siemens C.T. compartments have beendesigned to conform to this standard.All specific utility requirements takeprecedence but in the absence of anyspecial requirements, the standard willbe used.
PB-2 5.06 Utility TransformerCompartment
Switchboard assemblies containing cur-rent transformer compartments for utili-ty metering shall be arranged as shownin Figures 1 through 4. All indicateddimensions are minimum except themounting for the current transformer.Mounting shall be for either bar or win-dow type transformers. The front of the compartment shall beaccessible through a sealable hinged,single or double door or removablecover.Barriers shall be installed as required toprevent access through other than seal-able doors or covers.
EUSERC Member Utilities
For all cases where incoming service isfrom below, underground pull sectionsare required. For EUSERC member utilities, under-ground pull sections require nonbussedsections for 400 ampere, lug landingsfor 600 and 800 ampere and bussedpull sections above 800 ampere.
Other Utilities
For all other utilities, non-bussed orbussed pull sections are required perlocal utility and code requirements.
Notes:
The utility C.T. compartments may be in theupper or lower portion of the Service Section.
Neutral may be located to the rear alongside ØAor ØC; — alternate rear location between ØAand ØB, or ØB and ØC.
All dimensions are shown in inches and mm.
The neutral need not be located in the C.T. com-partment, provided its location complies with1993 NEC. article 300-20, and with UL as theyrelate to induced currents.
Quantity and size of aluminum and copper busper UL 891, or manufacturers’ UL Listed sizes,based on temperature rise.
Barrier material and thickness per UL 891.
This standard is intended for C.T.’s built to ANSIC12.11-1978.
Sentron™ SwitchboardsStandard C.T. Compartments
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Dimensions
AmpereRating
400–800
400–800
1
2
2
3 10.00(254)
30(762)
30(762)
30(762)
38(965)
38(965)
38(965)
20(508)
28(711)
28(711)
A
9.00(229)
B
6.44(164)
7.50(191)
10.50(267)
C F G
10.00(254)
9.00(229)
10.88(276)
7.50(191)
17.50(445)
7.50(191)4 11.50
(292)6.02(153)
9.00(229)
17.50(445)
3
1200–2000
2 30(762)
38(965)
38(965)
7.50(191)4 11.50
(292)6.82(173)
9.00(229)
19.00(483)1200–2000
2 30(762)
38(965)
38(965)
7.50(191)4 11.50
(292)7.07(180)
9.00(229)
19.00(483)2500
2 30(762)
38(965)
38(965)
7.50(191)4 11.50
(292)7.07(180)
9.00(229)
19.00(483)3000–4000
H W D
Dimensions In Inches (mm)CompartmentDimensions In Inches (mm)
Table 7.29 NEMA Standard Only
BusDrillingFigureFig.
Figure 2
Figure 1
Figure 3 Figure 4
Sentron™ SwitchboardsUtility Metering — Types SB1, SB2, and SB3
General
116 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
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480V 240V Utility
Electric Utility Company Code Hot Cold Hot Cold SB1 SB2 SB3
Alameda City of Bureau of Electricity EUSERC X X X X X
Anaheim City of Public Utilities Department EUSERC X X X X X
Anderson Municipal, IN AM X X X
Anoka Electric Co., MN AN X X X
Appalachian Power Co., VA (NEMA) AP X X X X X
Arizona Public Service Company EUSERC X X X X X
Atlantic Electric, NJ AE X X X X X
Austin Electric Dept., TX AU X X X
Azusa City of Light and Water Department EUSERC X X X X X
Baltimore Gas & Electric, MD BG X X X X X
Bangor Hydro-Electric Co., ME BH X X X
Banning City of Electric Department EUSERC X X X X X
Belmont Municipal, MA BM X X X
Benton County Public Utility District No. 1 EUSERC X X X X X
Benton Rural Electric Association EUSERC X X X X X
Blackstone Valley Elect. Co., RI BV X X X
Boston Edison Co., MA BE X X X
Braintree Elect., Light Co., MA BL X X X
Burbank City of Public Service Department EUSERC X X X
Burlington Elect., Lighting Dept., VT BD X X X
Callum County Public Utility District CP X X X X X
Cambridge Electric Co., MA CA X X X
Central Colorado Pwr./Centel Corp., CO CX X X X
Central Hudson Gas & Electric, NY CH X X X X X
Central Illinois Light Co., IL CT X X X
Central Illinois Public Service, IL CV X X X
Central Maine Power Co., ME CM X X X X X
Central Vermont Public Service Corp., VT CR X X X
Chelan County Public Utility District EUSERC X X X X X
Chicopee Light & Power, MA CL X X X
Cincinnati Gas & Electric, OH CG X X X X X
Citizens Utility Company Kauat Electric Division EUSERC X X X X X
City of Colorado Springs X X X X X
City of Dover, DE CD X X X
City of Vineland, NJ CI X X X
Clark County Public Utility District EUSERC X X X X X
Cleveland Electric Illuminating Co., OH CC X X X
Colorado Springs Dept. of Utilities, CO EUSERC X X X X X
Columbus Div. of Electric, OH CY X X X
Columbus Southern Power, OH CU X X X
Commonwealth Edison Co., IL CE X X X X X
Commonwealth Electric, MA CW X X X
Concord Electric Co., NH CO X X X
Connecticut Light & Power Co., CT CN X X X X X
Consolidated Edison Co., NY (298-377) CS X X X
Consumers Power of Michigan, MI CF X X X
Coos-Curry Electric Cooperative EUSERC X X X X X
CP National Corporation EUSERC X X X X X
Cornbelt Electric Co-Op., IL CB X X X
Danvers Elect., Div., MA DC X X X
Dayton Power & Light Co., OH DP X X X
Delaware Power & Light Co., DE DL X X X
Delmarva Power & Light, DE DM X X X
Des Moines District X X X
Detroit Edison Co., MI DE X X X X X
Table 7.30 Utility Reference
Sentron™ SwitchboardsUtility Metering — Types SB1, SB2, and SB3
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GeneralTable 7.30 Utility Reference (cont’d)
480V 240V Utility
Electric Utility Company Code Hot Cold Hot Cold SB1 SB2 SB3
Duquesne Light Co., PA DU X X X
East Central Electric, MN EC X X X
Eastern Edison Co., MA EE X X X
Eugene Water and Electric Board X X X X X
Exeter & Hampton Electric Co., NH EH X X X
Florida Power and Light (NEMA) X X X
Franklin County Public Utility District EUSERC X X X X X
Freeport Electric Dept., NY FE X X X
Georgia Power Co., GA (NEMA) GP X X X X X
Glendale City of Public Service Department EUSERC X X X X X
Granite State, NH (NEMA) GS X X X X X
Grant County Public Utilities District EUSERC X X X X X
Gray’s Harbor County District No. 1 EUSERC X X X X X
Green Mountain Power Co., VT (NEMA) GM X X X X X
Greenport Electric Dept., NY GL X X X
Gulf State Utilities Co., TX GE X X X X X
Hampton Power and Light (NEMA) X X X X X
Hancock Co., Rural Electric Corp., IA HC X X X
Hawaii Electric Company EUSERC X X X X X
Hawaii Electric Light Company EUSERC X X X X X
Heraldsburg EUSERC X X X X X
Idaho Power EUSERC X X X X X
Idaho Power Company EUSERC X X X X X
Illinois Power Co., IL IC X X X X X
Imperial Irrigation District EUSERC X X X X X
Indiana & Michigan Electric Co., IN IM X X X
Indianapolis Power & Light, IN IP X X X X X
Interstate Power Co., IA IN X X X
Iowa Illinois Gas & Electric, IA IL X X X
Iowa Public Service, IA IS X X X X X
Iowa Southern Utilities Co., IA IU X X X
Jacksonville Electric Authority, FL (NEMA) JE X X X X X
Jersey Central Power & Light, NJ JC X X X
Kansas City Power & Light Co., MO KC X X X X X
Kansas Gas & Electric Co., KS KG X X X
Kansas Power & Light, KS KL X X X
Kentucky Power, KY (NEMA) KP X X X
Kentucky Utilities, KY (NEMA) KU X X X
Klickitat Company Public Utility District EUSERC X X X X X
Lake Superior District Power Co., MN LS X X X
Lassen Municipal Utility District EUSERC X X X X X
Laverne Municipal Electric Plant, OK LM X X X
Lincoln Electric System, NE LC X X X
Lodi EUSERC X X X X X
Lompoc EUSERC X X X X X
Long Island Lighting Co., NY LI X X X
Los Angeles Department of Water and Power EUSERC X X X X X
Louisville Gas & Electric Co., KY LG X X X X X
Lubec Water & Electric District, ME LL X X X
Madison Gas & Electric Co., WI MG X X X
Maine Public Service Co., ME MP X X X
Mason County Public Utility District EUSERC X X X X X
Massachusetts Electric Co., MA (NEMA) MC X X X X X
Maui Electric Company EUSERC X X X X X
McMinnvile Water and Light EUSERC X X X X X
Sentron™ SwitchboardsUtility Metering — Types SB1, SB2, and SB3
General
118 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
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480V 240V Utility
Electric Utility Company Code Hot Cold Hot Cold SB1 SB2 SB3
Messa EUSERC X X X X X
Metropolitan Edison Co., PA ME X X X X X
MidAmerica Energy X X X X X
Midwest Power Co., IA MI X X X
Minnesota Power & Light Co., MN ML X X X
Mississippi Power & Light, MS MS X X X
Modesto Irrigation Distict EUSERC X X X X X
Monongahela Power Co., WV MO X X X
Montana Dakota Utilities, MT/ND/SD MD X X X
Montana Power and Light EUSERC X X X X X
Montana Power Company EUSERC X X X X X
Muscatine Power & Water, IA MW X X X
Narragansett Electrical Co., RI NE X X X X X
Navopacheelectriec Cooperative Incorporated EUSERC X X X X X
Nema X X X X X
Nevada Electric X X X X X
Nevada Power Company Incorporated X X X X X
New England Power X X X
New Orleans Public Service, LA NO X X X X X
Newport Electric Corp., RI NC X X X
New York State Electric & Gas Corp., NY NY X X X X X
Niagara Mohawk Corp., NY NM X X X
Northern Indiana Public Service, IN NI X X X
Northern States Power Co., MN/WI/ND/SD NS X X X X X
NorthEast Utility X X X
Northwestern Public Service, SD NP X X X
Norwich Dept. of Public Utilities, CT ND X X X
Norwood Municipal Light Co., MA NL X X X
Ohio Edison Co., OH OE X X X
Ohio Power Co., OH OP X X X
Omaha Public Power District, NE OM X X X X X
Orange & Rockland Utilities, NY OR X X X X X
Otter Tail Power Co., MN OT X X X
Pacific Gas and Electric EUSERC X X X X X
Pacific Power and Light Company EUSERC X X X X X
Palo Alto City of Water and Power Department EUSERC X X X X X
Parker Municipal Light Dept., SD PM X X X
Pasadena City of Water and Power Department EUSERC X X X X X
Penn Electric X X X X X
Peninsular Light Company EUSERC X X X X X
Pennsylvania Electric Co., PA PE X X X
Pennsylvania Power Co., PA PY X X X
Pennsylvania Power & Light Co., PA PL X X X
Philadelphia Electric Co., PA PH X X X X X
Plumas-Sierra Rural Electric Company EUSERC X X X X X
Port Angles City Light EUSERC X X X X X
Portland General Electric EUSERC X X X X X
Potomac Edison Co., MD PT X X X X X
Potomac Electric Power Co., DC PP X X X
Public Service Electric & Gas Co., NJ PS X X X X X
Public Service of Colorado, CO PC X X X X X
Public Service of Indiana, IN PI X X X
Public Service of New Hempshire, NH PU X X X
Puget Sound Power and Light EUSERC X X X X X
Redding City of Electric Utility EUSERC X X X X X
Table 7.30 Utility Reference (cont’d)
Sentron™ SwitchboardsUtility Metering — Types SB1, SB2, and SB3
119CSI Section 16470 Siemens Electrical Products and SystemsSpecification Guide
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7
General
480V 240V Utility Electric Utility Company Code Hot Cold Hot Cold SB1 SB2 SB3
Richland EUSERC X X X X XRiverside City of Riverside Public Utility EUSERC X X X X XRochester Gas & Electric Co., NY RG X X XRockland Electric X X XRockville Centre Electric Dept., NY RE X X XRoseville City of Electric Department EUSERC X X X X XSacramento Municipal Utility District EUSERC X X X X XSalem Electric EUSERC X X X X XSalt River Project EUSERC X X X X XSan Diego Gas and Electric EUSERC X X X X XSanta Clara City of Electric Department EUSERC X X X X XSeatle City of Washington EUSERC X X X X XSierra Pacific Power Company EUSERC X X X X XSnohomish County Public Utility District No. 1 EUSERC X X X X XSouthern California Edison Company EUSERC X X X X X Southern California Water Company EUSERC X X X X X South Central Elec. Association, MN SC X X X South Hadley Electric Light Dept., MA SH X X XSouth Norwalk Electric, CT SN X X XSouthern Indiana Gas & Electric, IN SI X X XSouthern Maryland Co-Op, MD SM X X XSpringField Utility Board EUSERC X X X X X St. Louis Municipal Electric, MI SL X X XSulpher Springs Valley Electric Corporation EUSERC X X X X XSuperior Water Light & Power, MN SW X X X Tacoma EUSERC X X X X XTallahassee Electric (NEMA) X X X X XTrico Electric Cooperative EUSERC X X X X XTruckee Donner Public Utility District EUSERC X X X X XTucson Electric Power Company EUSERC X X X X XTurlock Irrigation District EUSERC X X X X XToledo Edison, OH TE X X X Ukia EUSERC X X X X XUnion Electric of St. Louis, MO UE X X X X XUnion Light Heat & Power Co., KY UL X X XUnited Illuminating Co., CT UI X X X X XUtah Power and Light X X X X XVermont Public Service, VT VP X X XVernon EUSERC X X X X XVillage of Hamilton, NY VH X X XVirginia Electric Power Co., VA VE X X XWakefield Municipal, MA WM X X XWashing Water and Power EUSERC X X X X XWatertown Municipal, NY WA X X XWatertown Municipal Utilities, SD WU X X XWellesley Dept. of Public Works, MA WY X X XWestField Gas and Electric X X XWest Penn Power Co., PA WP X X XWestern Area Power Administration EUSERC X X X X XWestern Gas and Electric X X XWestern Massachusetts Electric Co., MA WT X X XWesterville Electric Co., OH WR X X XWheatland Electric Co-Op., KS WC X X XWisconsin Electric Power Co., WI WE X X XWisconsin Power & Light Co., WI WL X X XWisconsin Public Service, WI WS X X X
Table 7.30 Utility Reference (cont’d)
Dimensions
120 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
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AmpereRating(MLO)
400
600
800
1000
1200
1600
2000
AllTypesH1
PullBoxH2
MinimumAll TypesW1
AllTypesW2
D1 Bussed Pull Section
D2
SB1 SB2 SB3SB1 SB2 SB3
Distribution Section
SB1 SB2 SB3H3c H4c
Unit Space
E
E
E
E
E
E
E
C
C
C
C
C
C
C
A
A
A
A
A
A
A
E
E
E
F
F
F
F
C
C
C
D
D
D
D
A
A
A
B
B
B
B
E
E
E
F
F
F
F
C
C
C
D
D
D
D
A
A
A
B
B
B
B
32 or 38(813 or965)
90(2286)
15(381)
30(762)
65(1651)
38(965)
Standard Utility Metering
Table 7.31 Standard Utility Dimensions
Dimensions in Inches (mm)
Height Width Depth - Minimum — Letters Reference Chart Below
AmpereRating(MLO)
400
600
800
1000
1200
1600
2000
AllTypesH1
PullBoxH2
MinimumAll TypesW1
AllTypesW2
D1 Bussed Pull Section
D2
SB1 SB2 SB3SB1
A
B
C
D
E
F
SB2 SB3
Distribution Section
SB1 SB2 SB3H3c H4c
Unit Space
30 (762)c
30 (762)c
30 (762)c
30 (762)c
—
—
—
—
—
—
h
h
h
h
—
—
—
65 (1651)c
65 (1651)c
65 (1651)c
65 (1651)c
65 (1651)c
65 (1651)c
65 (1651)c
E
E
E
E
E
E
E
C
C
C
C
C
C
C
A
A
A
A
A
A
A
E
E
E
E
F
F
F
C
C
C
C
D
D
D
A
A
A
A
B
B
B
E
E
E
E
—
—
—
C
C
C
C
—
—
—
A
20 in.(508 mm)
28, 38 in.(711, 965 mm)
28 in.(711 mm)
20, 28, 38, 48, 58 in.(508, 711, 965, 1219, 1473 mm)
20, 28, 38 in.(508, 711, 965 mm)
28, 38, 48, 58 in.( 711, 965, 1219, 1473 mm)
A
A
A
—
—
—
32 or 38(813 or965)
32 or 38(813 or965)
90(2286)
EUSERC Utility Meteringg
Table 7.32 EUSERC Utility Dimensions
Depth Reference Chart
a Verify dimensions with local utility requirements.b See page 129 for dimensions.c See page 129 for unit space of disconnect devices.
EUSERC Utility Notes:d Not applicable for EUSERC.e Busway available for SB3 only.f Not allowed by Los Angeles Department of Water and
Power or San Diego Gas & Electric.g Some jurisdictions do not allow multi-main service
equipment.h 400 / 1000A fed by 500 KCMIL — No pull box required.
400 / 1000A fed by 750 KCMIL — 10.0" pull box required.
Dimensions in Inches (mm)
Height Width Depth - Minimum — Letters Reference Chart Below
Top Entrance Cables 4
or Busway 5Bottom Entrance Cables Only 4
Non-Bussed Pull Section 6Bottom Entrance Cables
Invert For Top Feed
Sentron™ SwitchboardsService Sections — Utility Metering and Multi-Main Disconnects
Hot Sequence Only
121CSI Section 16470 Siemens Electrical Products and SystemsSpecification Guide
Dimensions
Max.Amp.Rating
DeviceType SB1 SB2 SB3 RCIIISB1 SB2 SB3 RCIII H1
PullBoxH2 W1 W2 W3
Non-Bussed
Device AppliesTo Switchboard
BussedUG
Depth Available
Dimensions in Inches (mm)
Height Width
Letters ReferenceChart BelowD
Molded Case Circuit Breakers
400
600
800
Pull Sectiona
JXD2, JXD6,JD6, HJD6 A C E J
— C E J— — E JA C E J
JC E J— — E JA C E J
— C E J— — E JB D F J
— D F J— — F JB D F J
— D F J— — F JB D F J
— D F J— — F JB D F J
— D F J— G H J— G H J
— D F J— D F J— D F J— G H J— G H J— G H J
— — J J— — J J— — J J— — J J— — J J— — J J
B D F JB D F JB D F JB D F JB D F J
— D F J— D F J— G G J— G G J— G G J
B D F J
• • • •
• • •• •
• • • •• • • •
• •• • • •
• • •• •
• • • •
• • •• •
• • • •
• • •• •
• • • •
• • •• •
• • • •
• • •• • •
—
——• • •
• • •• • •• • •• • •• • •• • •
• •• •• •• •• •• •
• • • •• • • •• • • •• • • •• • • •
• • •• • •• • •• • •• • •
•••
• • •
SJD6CJD6, SCJD6
1000
NXD6, ND6,HND6SND6CND6, SCND6
1200
NXD6, ND6,HND6SND6
1600
PXD6, PD6,HPD6SPD6
CND6, SCND6
CPD6, SCPD6
2000
2500c
RXD6, RD6,HRD6SB2000SSB2500S
800
1600 Type SBEncasedSystemsBreaker
Type RL,RLF LowVoltagePowerCircuitBreaker
2000
2500c
3000c
4000c
3000c SB3000S
LXD6, LD6, HLD6SLD6CLD6, SCLD6
SMD6CMD6, SCMD6
LMXD6, LMD,HLMXD6, HLMD6,MXD6, MD6, HMD6
20 (508)
20 (508)
32 (813)
32 (813)
32 (813)
32 (813)
14 (356)
20 (508)
32 (813)
—
—
15 (381)
b
20 (508)
— G H J—• • •3200 STD6, SHTD6, SHHTD6 25 (635)
10 (254)
20 (508)
20 (508)
20 (508)
32 (813)
32 (813)
10 (254)
15 (381)
—
—
15 (381)
15 (381)
15H (381)
2
20 (508)
—20 (508)
20 (508)
90 (2286)
38 (965)
90 (2286)
90 (2286)
90 (2286)
14 (356)
38(965)
38(965)
38(965)
46(1168)
46(1168)
Table 7.33 Standard Utility — Hot Sequence (C.T.’s on Line Side of Main)
Insulated Case Circuit Breakers — Stationary Mountedd
800
1600
2000
2500e
3000e
4000e
Vacu-Break
BoltedPressure
800
1000
1200 800
AA
C E JC E J
A C E JA C E J
• • • •• • • •• • • •• • • •
HCP
400
600
800
1200
1000
1200
1600
2000
2500
3000
4000
Low Voltage Power Circuit Breakers — Draw-Out Fusible and Non-Fusible
Switches
32 (813)
A
B
C
E
F
G
20 in. (508 mm) 20, 28, 38, 48, 58 in. (508, 711, 965, 1219, 1473 mm)28 in. (711 mm) 28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)20, 28, 38 in. (508, 711, 965 mm) 38 in. (965 mm)
D H28, 38 in. (711, 965 mm) 38, 48, 58 in. (965, 1219, 1473 mm)J 48, 58 in. (1219, 1473 mm)
Depth Reference Chart a Minimum widths shown. Refer to page 129 for optionawidths.
b Not required.c C.T. compartment must be mounted in a bussed pull
section.d For Types SB3 and RCIII, drawout SB breakers are
available as an option. Minimum depth SB3 – 38 in. (965 mm), RCIII – 48 in. (1219 mm).
e For fusible RLF breaker, utility compartment must bemounted in a bussed pull section.
f Busway available for Type SB3 only.
Top Entrance Cablesor Busway 6
Bottom Entrance withNon-Bussed Pull Section
Cables Only
Bottom Entrance withBussed Pull Section
Cables Only
Sentron™Sw
itchboards
7
Sentron™ SwitchboardsService Sections — Utility Metering & Single Main Disconnects (Standard Utilities)
Dimensions
122 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
Sent
ron™
Switc
hboa
rds
7
Max.Amp.Rating
DeviceType SB1 SB2 SB3 RCIII1 2 3SB2SB1 SB3 RCIII H1
PullBoxH2
Fig.1-3a
W1
Fig.2a
W2Fig. 3W3
Device AppliesTo Switchboard
DeviceAppliesTo Figure
Depth Available
Dimensions in Inches (mm)
Height Width - Minimum Letters Reference
Chart BelowD
Molded Case Circuit Breakers
400
600
800
JXD2, JXD6,JD6, HJD6 A C E J
— C E J— — E JA C E J— C E J— — E JA C E J
— C E J— — E JB C E J
— C E J— — E JB D B J
— B B J— — B JB D B J
— B B J— — B JB D B J
— B B J— G H J— G H J
— D F J— D F J— D F J— G H J— G H J— G H J
— — J J
— — J J— — J J— — J J— — J J— — J J
B D F J
B D F JB D F JB D F J
B D F J
B D F JB D F J— G H J— G H J— G H J
B D F J
• • • •
• • •• •
• • • •• • •
• •• • • •
• • •• •
• • • •
• • •• •
• • • •
• • •• •
• • • •
• • •• •
• • • •
• • •• • •
—
———
• • •
• • •
• • •• • •• • •• • •• • •
• •
• •• •• •• •• •
• • • •
• • • •• • • •• • • •
• • • •
• • • •• • • •
• • •• • •• • •
• • • •
✓
✓
✓
✓
✓
✓✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓✓✓✓✓
✓
✓✓✓✓✓
✓
✓✓✓
✓
✓✓✓✓✓
✓
✓
✓
✓
✓
✓
✓✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓✓✓✓✓
✓
✓✓✓✓✓
✓
✓✓✓
✓
✓✓✓✓✓
✓
✓
✓
✓
✓
✓
✓✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓✓✓✓✓
✓
✓✓✓✓✓
✓
✓✓✓
✓
✓✓✓✓✓
✓
SJD6CJD6, SCJD6
1000NXD6, ND6,HND6SND6CND6, SCND6
1200NXD6, ND6,HND6SND6
1600PXD6, PD6,HPD6SPD6
CND6, SCND6
CPD6, SCPD6
2000
2500 c
RXD6, RD6,HRD6SB2000SSB2500S
800
1600 Type SBEncasedSystemsBreaker
Type RL,RLF LowVoltagePowerCircuitBreaker
20002500 c3000 c4000 c
3000 c SB3000S—52
(1321)32(813)
G H J—• • • ✓ ✓ ✓3200 c STD6, SHTD6, SHHTD6
LXD6, LD6, HLD6SLD6CLD6, SCLD6
SMD6CMD6, SCMD6
MXD6, MD6,HMD6
38 (965)
32 (813)
32 (813)
32 (813)
46 (1168)
52 (1321)
52 (1321)
46 (1168)
52 (1321)
46 (1168)
14 (356)
20 (508)
32(813)
—
—
b
20 (508)
38 (965)
10 (254)
32 (813)
46 (1168)
32 (813)
38 (965)32 (813)
32 (813)
32 (813)
32 (813)
10 (254)
15 (381)
—————— —
—
—
—
——
——
———
10(254)
20 (508)
—
38 (965)
90 (2286)
90 (2286)
90 (2286)
90 (2286)
32(813)
38(965)
38(965)
38(965)
46(1168)
46(1168)
Table 7.34 EUSERC Utility — Hot Sequence (C.T.’s on Line Side of Main)
Insulated Case Circuit Breakers — Stationary Mounted d
800
160020002500 e3000 e
A C E JA C E JA C E JA C E J
• •• •• •• •• •
• •• •• •
✓✓✓✓
✓✓✓✓
✓✓✓✓
HCP
—10 (254)
400 600 8001200
4000 e
Vacu-Break
BoltedPressure
800
10001200 800
1000120016002000250030004000
Low Voltage Power Circuit Breakers — Draw-Out Fusible and Non-Fusible
Switches
A
B
C
E
F
G
20 in. (508 mm) 20, 28, 38, 48, 58 in. (508, 711, 965, 1219, 1473 mm)28 in. (711 mm) 28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)20, 28, 38 in. (508, 711, 965 mm) 38 in. (965, mm)
D H28, 38 in. (711, 965 mm) 38, 48, 58 in. (965, 1219, 1473 mm)J 48, 58 in. (1219, 1473 mm)
Depth Reference Chart
a Minimum widths shown. Refer to page 129 for optionalwidths.
b Not required.c C.T. compartment must be mounted in a bussed pull
section.d For Types SB3 and RCIII drawout SB breakers are
available as an option. Minimum depth SB3 – 38 in. (965 mm), RCIII – 48 in. (1219 mm).
e For fusible RLF breaker, utility compartment must bemounted in a bussed pull section.
f Busway available for Type SB3 only.
20 (508)
20 (508)
Top Entrance Cablesor Busway 6
Bottom Entrance withNon-Bussed Pull Section
Cables Only
Bottom Entrance withBussed Pull Section
Cables Only
Sentron™ SwitchboardsService Sections — Utility & Metering Single Main Disconnects (EUSERC Utilities)
123CSI Section 16470 Siemens Electrical Products and SystemsSpecification Guide
Sentron™Sw
itchboards
7
Dimensions
Max.Amp.Rating
DeviceType SB1 SB2 SB3 RCIIISB1 SB2 SB3 RCIII H1 W1 W2 W3
Non-Bussed
Device AppliesTo Switchboard
BussedUG
Depth Available
Dimensions in Inches (mm)
Height Width
Letters ReferenceChart BelowD
Molded Case Circuit Breakers
400
600
800
Pull Box
JXD2, JXD6,JD6, HJD6 A C E J
— C E J— — E JA C E J— C E J— — E J
A C E J
— C E J— — E JA C E J— C E J— — E JA C E J
— C E J— — E JB D F J
— D F J— — F JB D F J— D F J— B H J
— G H J
— D F J— D F J— D F J— G H J— G H J— G H J
— — J J— — J J— — J J— — J J— — J J— — J J
B D F JB D F JB D F JB D F JB D F J
B D F JB D F J— G H J— G H J— G H J
B D F J
• • • •
• • •• •
• • • ••• •
• •
• • • •
• • •• •
• • • •• • •
• •• • • •
• • •• •
• • • •
• • •• •
• • • •• • •• • •
—
—
—• • •
• • •• • •• • •• • •• • •• • •
• •• •• •• •• •• •
• • • •• • • •• • • •• • • •• • • •
• • • •• • • •
• • •• • •• • •
• • • •
SJD6CJD6, SCJD6
1000 NXD6, ND6, HND6SND6CND6, SCND6
1200
NXD6, ND6,HND6SND6
1600
PXD6, PD6,HPD6SPD6
CND6, SCND6
CPD6, SCPD62000
2500
RXD6, RD6, HRD6SB2000SSB2500S
800
1600 Type SBEncasedSystemsBreaker
Type RL,RLF LowVoltagePowerCircuitBreaker
20002500
30004000
3000 SB3000S
• • •3200 STD6, SHTD6,SHHTD6
LXD6, LD6, HLD6SLD6CLD6, SCLD6
SMD6CMD6, SCMD6
MXD6, MD6, HMD6,LMXD6, LMD6,HLMD6, HLMXD6
20 (508)
20 (508)
32 (813)
38 (965)
32 (813)
38 (965)
32 (813)
38 (965)
32 (813)
32 (813)38 (965)
14 (356)
32 (813)
32 (813)
20 (508)
—
38 (965)
20 (508)
20 (508)
20 (508)
32 (813)
14 (356)
38 (965) —
—
38 (965)
38 (965)
—46 (1168)
46 (1168)
90 (2286)
90 (2286)
90 (2286)
90 (2286)
Table 7.35
Insulated Case Circuit Breakers — Stationary Mounted a
800
160020002500b
3000b
4000b
Vacu-Break
HCP
BoltedPressure
800
A C E JA C E JA C E JA C E J
• • • •1200
• • • •800
• • • •600
• • • •400
10001200
800
1000
1200
1600
2000
2500
30004000
Low Voltage Power Circuit Breakers — Draw-Out Fusible and Non-Fusible
Switches
Depth Reference Chart
a For Types SB3 and RCIII, drawout SB breakers areavailable as an option. Minimum depth SB3 38 in.(965 mm), and RCIII 48 in. (1219 mm).
b For fusible RLF breaker, utility compartment must bemounted in a bussed pull section.
A
B
C
E
F
G
20 in. (508 mm) 20, 28, 38, 48, 58 in. (508, 711, 965, 1219, 1473 mm)28 in. (711 mm) 28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)20, 28, 38 in. (508, 711, 965 mm) 38 in. (965, mm)
D H28, 38 in. (711, 965 mm) 38, 48, 58 in. (965, 1219, 1473 mm)J 48, 58 in. (1219, 1473 mm)
Top Entrance Cables Pull Box
Bottom Entrance withNon-Bussed Pull Section
Bottom Entrance withBussed Pull Section
Bottom Entrance
Sentron™ SwitchboardsService Sections — Non-Utility Type with/wo Customer Metering & Main Disconnect
SB1 and SB2 combination service / distri-bution sections house both a main ser-vice disconnect device and branch distrib-ution disconnects. Switchboards can befurnished with “Suitable for Use as
Service Equipment” labels, but includeno provisions for utility metering or cus-tomer metering.Branch circuit device unit space varies,depending on the rating and consequent
physical size of the main disconnectdevice. If more unit space is requiredthan is shown in the tables below, one ormore additional distribution sectionsmust be added.
Sentron™ SwitchboardsCombination Sections — Types SB1, SB2, and SB3
Dimensions
124 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
Sent
ron™
Switc
hboa
rds
7
Combination Service Disconnect and Distribution Sections — MCCB Main
PullBoxH2
Max.Amp.Rtg.
BreakerType
Svc.Ent.Lbl.
Mtg.Posi-tion
MainLoca-tionLSB1 SB2 SB3H1 With W4
Fig.4 &5
Device Applies To Switchboard
Letters ReferenceChart Below
Unit Space U1 e f
Depth Available ConduitArea
Dimensions in Inches (mm)
Height Width
D2
SB1 SB2 SB3SB1 SB2 SB3
D1
400
e fUnitSpace U2
JXD2, JXD6,JD6, HJD6
Horiz. k
Yes
Yesh
Vert.Top
K
3.00(76)
ToporBot-tom
2.50(64)
A C E B D F
A C E B D FA C E A C E
— C E B D F— — E B D FA C E B D F
— C E B D F— — E B D FA D E B D F
— D E B D F— — F B D FB D F B D F— D F B D F— — F B D FB D F B D F
— C E B D F— — E B D FA C E B D F— C E B D F—
—
— E B D F
• • •
• • •• • •
• • •
• • •
• • •
• • •
• • •
• •
• •
• •
• •
• •
• •
•
•
•
•
•
•
SJD6
600
800
LXD2, LXD6,HLD6, SLD6
CJD6, SCJD6
CLD6, SCLD6
MXD6, MD6, HMD6SMD6CMD6,SCMD6
1000
NXD6, ND6, HND6
1600
PXD6, PD6, HPD6SPD6CPD6, SCPD6
2000 RXD6, RD6, HRD6
SND6CND6, SCND6
1200
NXD6, ND6, HND6
SND6CND6, SCND6
32(813)or38(965)
38(965)
—
—
38(965)
38(965)
W3
Fig.3
W2
Fig.2
W1
Fig.1
Without
Load Through-Bus
38(965)g
38(965)g
—
45.00(1143)
52.50 (1334)52.50 (1334)40.00 (1016)42.50 (1080)
53.75 (1365)53.75 (1365)
52.50 (1334)52.50 (1334)52.50 (1334)52.50 (1334)
40.00 (1016)42.50 (1080)52.50 (1334)52.50 (1334)52.50 (1334)52.50 (1334)
40.00 (1016)42.50 (1080)52.50 (1334)52.50 (1334)
—
32(813)
32(813)
46.25j
(1175)53.75 (1365)56.25 (1429)
——30.00(762)——
90(2286)
i
Table 7.36 Main Breaker with or without Ground Fault Protection
A
B
C
D
E
F
20 in.(508 mm)
28, 38in.(711, 965 mm)
28 in.(711 mm)
20, 28, 38, 48, 58 in.( 508, 711, 965, 1219, 1437 mm)
20, 28, 38 in.(508, 711, 965 mm)
28, 38, 48, 58 in.( 711, 965, 1219, 1437 mm)
Depth Reference Chart a Unit may be inverted.b Load cables must exit bottom.c Refer to Table 7.41 for dimensions.d Not available with load through bus.e Ground fault, if applied, uses 10 in. (254 mm) of unit space.f See page 128 for unit space of disconnect devices.g 46 in. (1168 mm) wide if 750 kcmil lugs required.h Service entrance label at 480V requires ground fault.i Pull box height: Standard 500 kcmil lugs = 10 in. (254 mm)
Alternate 750 kcmil lugs = 15 in. (381 mm)j For use with 100% rated breakers.k Vertical mounted when using 100% rated devices.
45.00j
(1143)
—
38(965)
LMD, HLMD
400-1200AMain Breaker Without GFP
400-1200AMain Breaker
With GFP
1600-2000A Main BreakerWith or Without GFP
400-1200A MCCB With Line Through Bus
1600-2000A MCCB With Line Through Bus
Fig. 1 Top Entrancea Fig. 3Fig. 2 Bottom Entrancea Fig. 4 Fig. 5
Sentron™ SwitchboardsCombination Sections — Types SB1, SB2, and SB3
125CSI Section 16470 Siemens Electrical Products and SystemsSpecification Guide
Sentron™Sw
itchboards
7
DimensionsCombination Service Disconnect and Distribution Sections Main Vacu-Break®
H3
Top Entrance and Invert for Bottom Entrance
Top Entrance and Invert for Bottom Entrancef
Bottom EntranceInvert for Top Entrance
Bottom Entrance Invert for Top Entrance
400 and 600A Vacu-Break 800 and 1200A Vacu-Break 400 and 600A Vacu-Breakg 800 and 1200A Vacu-Break
TopPullBoxH2
MaximumAmpereRating
ServiceEntranceLabel
MainLocationLSB1 SB2 SB3H1
WithLoadThroughBus
Applies To Switchboard
Letters ReferenceChart Below
Unit Space - H3 eDepth Available
ConduitArea
Dimensions in Inches (mm)
Height Width
D2
SB1 SB2 SB3SB1 SB2 SB3
D1
400
UnitSpaceH4 e
Yes
Yes c
K
A ToporBottom
ToporBottom
C E B D F
A C E B D F
B D F B D F
B D F B D F
• • •
• • •
• • •
• • •
600
800
1200
W
WithoutLoadThroughBus
2.50(64)
3.00(76)
30.00 (762) 30.00 (762)30.00 (762)
36.25 (921)43.75 (1111)43.75 (1111) 38.00 d
(965)
38.00 (965)
33.75 (857)41.25 (1048)—
90.00(2286)
Table 7.37—400–1200A Vacu-Break Switch Main
10.00 f(2.54)
400 & 600AVacu-Break
MainSwitch
A
B
C
D
E
F
20 in. (508 mm)
28, 38 in. (711, 965 mm)
28 in. (711 mm)
20, 28, 38, 48, 58 in. ( 508, 711, 965, 1219, 1473 mm)
20, 28, 38 in. (508, 711, 965 mm)
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
Depth Reference Charta Load cables must exit bottom.b Refer to page 129 for dimensions.c Service entrance label at 240V only.
d 38 in. (965 mm) wide standard, 32 in. (813 mm) wideavailable as an option.
e See page 130 for unit space of disconnect devices.f 15 in. (381 mm) pull box when alternate 750 kcmil lugs.
Sentron™ SwitchboardsCombination Sections — Types SB1, SB2, and SB3
Dimensions
126 CSI Section 16470Siemens Electrical Products and SystemsSpecification Guide
Sent
ron™
Switc
hboa
rds
7
Conduit AreaTop or Bottom
38(711 mm)
Conduit AreaTop or Bottom
38(711 mm)
MaximumAmpereRating
ServiceEntranceLabel
MainLocationLSB1 SB2 SB3H1
750kcmilLugs
Applies To Switchboard
Letters ReferenceChart Below
Top Pull Box — H2
Depth Available
ConduitAreaf
Dimensions in Inches (mm)
Height
SB1 SB2 SB3
D
800
UnitSpaceH3 c
Yes
Yes d
K
Top
B D F
B D F
B D F
B D F
• • •
• • •
• • •
• • •
1200
1600
2000
500kcmilLugs
2.50(64)
3.00(76)
30(762)
20(508)
90.00(2286)
10(254)
Table 7.39—800–2000A Bolted Pressure Switch Main, with or without Ground Fault
A
B
C
D
E
F
20 in. (508 mm)
28, 38 in. (711, 965 mm)
28 in. (711 mm)
20, 28, 38, 48, 58 in. ( 508, 711, 965, 1219, 1473 mm)
20, 28, 38 in. (508, 711, 965 mm)
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
Depth Reference Chart
a Load cables must exit bottom.b See page 129 for dimensions.c See page 130 for unit space of disconnect devices.d On bolted pressure switch rated 1000A or greater without ground fault, service entrance label for 240V only.e Not available with load thru bus.f Conduit restricted to rear 10 in. (254 mm) for inverted
bottom entrance.
Bottom EntranceTop Entrance
Combination Service Disconnect and Distribution Sections HCP Switch and Bolted Pressure Switch
MaximumAmpereRating
ServiceEntranceLabel
MainLocationLSB1 SB2 SB3H1
Applies To Switchboard
Letters Reference Chart Below
H3 c
Depth Available
Conduit Area
Dimensions in Inches (mm)
Height Width D2
SB1 SB2 SB3SB1 SB2 SB3
D1
400
Yes
K
ATop or Bottom
C E B D FA C E B D FB D F B D FB D F B D F
• • •• • •• • •• • •
600 800
1200
W
2.50(64)
3.00(76)
38.00 (965)
90.00(2286)
Table 7.38 400–1200A HCP Switch Main
46.25(1175)
Unit Space
H3
400-1200AHCP
Main Switch
Top Entrance and Invert for Bottom Entrance
Bottom EntranceInvert for Top Entrance
400A – 1200A HCP 400 – 1200A HCPe
400-1200AHCP
Main Switch
Sentron™ SwitchboardsDistribution Sections — Types SB1, SB2, and SB3
127CSI Section 16470 Siemens Electrical Products and SystemsSpecification Guide
Sentron™Sw
itchboards
7
Dimensions
a
Main Lug Only –– 400A through 2000A
MaximumAmpereRating
ServiceEntranceEquipmentc d
Suitable for Use As
400
SB1
Depth Available
Letters refer ToChart BelowD
Width
W aCrimp600 kcmil Max.
Alternate750 kcmil
Standard500 kcmil
AICRating
Section Configuration H1
Lugs
Distribution Unit Space a
SB2 KSB3 L
A
C
E
ECA
20 in.(508 mm)
90.00(2286)
62.50(1588)
200,000
200,000
200,000
200,000
42,000
100,000
42,000
100,000
42,000
100,000
42,000
100,000
60.00(1524)
55.00(1397)
32 or 38(813 or965)
32 or 38(813 or965)
38(965)
38(965)
38(965)
2.50(64)
3.00(76)
20, 28, 38, 48, 58 in.(508, 711, 965, 1219, 1473 mm)
Single without Through-Bus Only
600 ECA60.00(1524)
56.25(1429)
55.00(1397)
Single without Through-Bus Only Yes
Yes
800
ECA58.75(1492)
52.50(1334)
53.75(1365)
Single without Through-Bus Only Yes
ECA
ECA
ECA
ECA
ECA
ECA
51.25(1302)
45.00(1143)
46.25(1175)Multi With
Through-BusYes ECA
45.00(1143)
38.75(984)
45.00(1143)
1200
57.50(1461)
50.00(1270)
53.75(1365)
Single without Through-Bus Only Yes
50.00(1270)
42.50(1080)
46.25(1175)Multi With
Through-Bus Yes
1600
Single without Through-Bus Only Yes
Multi With Through-Bus Yes
45.00(1143)
38.75(984)
45.00(1143)
2000
Single without Through-Bus Only Yes
Multi With Through-Bus Yes
20, 28, 38 in.(508, 711, 965 mm)
Table 7.40—Main Lug Only Unit Space
Depth Reference Charta 46 in. (1168) width available as an option.b See page 130 for unit space of disconnect devices.c Maximum of 6 disconnect devices only.d SUSE service disconnects 1000A or higher on sodily
grounded wye systems of more than150V to groundrequired ground fault protection.Ground fault uses 10 in. (254 mm) of unit space. SeeNEC 230-95 for additional details. This applies to branchdevices 1000A or larger on non-service equipmentunless ground fault protection is provided upstream atthe service. See NEC 240-13 for further information.
Dimensions in Inches (mm)
Height
a
Top Feed Bottom Feed
Bottom Entrance
Sentron™ SwitchboardsDistribution Sections — Types SB1, SB2, and SB3
Dimensions
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Max.
Amp.
Rating
Device
Type SB1 SB2 SB3 1P 2P 3P
Device
Applies To
Switchboard
Total Poles
Available
Unit Space H2
Dimensions in Inches (mm)
Height
Twin
Mounted
Single
Mounted
Width
Enclosure
Minimum
W
Branch Breakers
Main Breakers
8
2
6
2 2
2 2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
—
—
—
—
—
—
—
—
—
—
——
—1
—
—
—
—
—
2 2—
2
—
2
2
2 2
• • •• • •• • •
• • •
• • •• • •
• • •
• • •
•
• • •
• •••
• •
••
•
•
•
• • •
• • •
• ••
• • •• •
•
• • ••
• •
••
• •
• • •
••
• • •
• ••
• • •
• • •• • •• • •• • •• • •• • •• • •• • •• • •• • •• • •• • •
• ••
• • •
ED2, ED4, HHED6 100
BL, BLH, HBL, BQD
ED2, ED4, ED6, HED4, HHED6
125
QJ2, QJH2, QJ2-H, HQJ2-H 225
CFD6 250
400
FXD6, FD6, HFD6, HFXD6,HHFD6, HHFXD6
CFD6 250FXD6, FD6, HFD6, HFXD6
LXD6, LD6, HLD6, HLXD6,HHLD6, HHLXD6
600
CLD6SCLD6
SLD6, SHLD6
MXD6, MD6, HMD6, HMXD6 800
CMD6SMD6, SHMD6
NXD6, ND6, HND6, HNXD61200
CND6, SCND6SND6, SHND6
MXD6, MD6, HMD6, HMXD6
800
CMD6SMD6, SHMD6
NXD6, ND6, HND6, HMXD61200
CND6, SCND6SND6, SHND6
HED4, HHED6, ED2, ED4,ED6 With AccessoriesCED6CED6 With Accessories
SJD6, SHJD6
SCJD6CJD6
JXD2, JXD6, JD6, HJD6,HJXD6, HHJD6, HHJXD6
400 SJD6, SHJD6
JXD2, JXD6, JD6, HJD6,HJXD6, HHJD6, HHJXD6
600
LXD6, LD6, HLD6, HLXD6,HHLD6, HHLXD6SLD6, SHLD6CJD6,SCJD6
CJD6,SCJD6
3.75 (95)
10.00 (254)
6.25 (159)
3.75 (95)32.00 (813)
6.25 (159) 5.00 (127)
5.00 (127)
— —
5.00 (127)8.75 (222)
32.00 (813)
8.75 (222)
8.75 (222)
32.00 (813)
32.00 (813)
38.00 (965)
Vacu-Break
10.00 (254)
10.00 (254)
2.50 (64)a
5.00 (127) —
10.00 (254)7.50 (191)
15.00 (381)
16.25 (413) 16.25 (413)
7.50 (191)
10.00 (254)b
—
—
7.50 (191) —
7.50 (191)10.00 (254)
15.00 (381)
10.00 (254)c——
—
38.00 (965)
38.00 (965)
32.00 (813)2 2 8.75 (222) — 38.00 (965)
Table 7.41 Unit Space Requirements — Molded Case Circuit Breakers
Max.Amp.Rating
30-30
30-30
30-60
60-60
60-100
100-100
200-200
400-1200
100
200
400
600
SwitchType SB1 SB2 SB3
DeviceApplies ToSwitchboard 240V 600V
Dimensions in Inches (mm)
Mounting Height
Twin Twin SingleSingle
EnclosureMinimumW
Table 7.42 Unit Space Requirements — Branch SwitchesWidth
a The 2.5 in. (64) high unit is suitable for NEC Class H, K1, and K5 fuses only. Class R rejection type fuse holdersare not available.
b Unit rated 600V, factory configured to accept 250V class H, K or R Fuses. Field convertible to accept class J Fuses.
5.00 (127)
32.00 (813)
c Factory configure to accept Class J Fuses only.
186
LMD6, LMXD6, HLMD6, HLMXD6
1• • •
LMD6, LMXD6, HLMD6, HLMXD6
HCP
Conduit Area Top or Bottom
Conduit Area Top or Bottom
Unit Space for Disconnect Devices
b D for Type SB2 = 28, 38 in. (711, 965 mm)D for Type SB3 = 28, 38, 48, 58 in. (711, 965, 1219, 1473 mm)
b D for Type SB2 = 28, 38 in. (711, 965 mm)D for Type SB3 = 28, 38, 48, 58 in. (711, 965, 1219, 1473 mm)
SB3 only
2 High Vacu-Break Distribution Section
2 High Bolted Pressure SwitchDistribution Section
Conduit Area Top or Bottom
b
Vacu-Break Combination Distribution Section
Sentron™ SwitchboardsDistribution Sections — Types SB1, SB2, and SB3
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Dimensions
Amp.Rtg.
400
600
800
1000
1200
1600
2000
2500
3000
4000
5000
6000
SB1 SB2 SB3 RCIII SB1
Depth AvailableWidthWidth
Std. cStd. withCustomer Metering c
With UtilityMetering c
EUSERC Pull Section Dimensions in Inches (mm)
Letter ReferenceChart Above
Depth Available
Letter ReferenceChart Above
Std.
Bussed with UtilityMetering
Std.
Hgt.
H Opt.
Standard Pull Section Dimensions in Inches (mm)
Non-Bussed Bussed
Hgt.
H Opt. cBussed
SB2 SB3 RCIII
14(356)
90(2286)
20(508)
20(508)
32(813)
38(965)
32(813)
38(965)
46(1168)
32(813)
46(1168)
52(1321) —46
(1168)
20(508)
38(965) or46d
(1168)
46(1168)
32(813)
——
32(813)
38(965)
46(1168)
38(965)
38(965)
46(1168)
38(965)
A,B C E J A,B C E J
A,B C E J A,B C E J
A,B C E J A,B C E J
A,B C E J A,B C E J
A,B C E J B B,G B, H J
A,B C E J B B,G H J
A,B C E J B B,G H J
— G d H d J G H J— G d H d J G H J
— G H J ——— G H J
— — H J— —
J— — H J J
90(2286)
Table 7.44 Non-Bussed & Bussed Pull Sections — Standard Utilities and EUSERC Utilities
c Top or bottom feed.d Pull sections without utility meters can be 28 in. (711 mm) deep minimum.e Determined by specific utility used.
52(1321)
D D
• • •• •• •
• •
2.5(64)
90.0(2286)
65.0(1651)
32.0 or(813)
38.0b
(965)
A C E— C E— G H
— G H62.5(1588)
38.0 or(965)
46.0(1168)
3.0(76)
MaximumRiserAmperage
WithMaximumThrough-BusAmperage
2000
3000
2000
3000
4000
4000
SB1 SB2 SB3
As Applied toSwitchboard
SB1H1 W
UnitSpaceH2 a SB2 SB3 K L
Letters ReferenceChart Below Conduit
Area
Dimensions in Inches (mm)
Height Width
Table 7.43 Through-Bus Fed Dimensions
a See page 128 for unit space of disconnect devices.b 46.00 (1168) width optional
A
B
C
E
G
20 in.(508 mm)
20, 28, 38, 48, 58 in.(508, 711, 965, 1219, 1473 mm)
28 in.(711 mm)
J 48, 58 in.( 1219, 1473 mm)
20, 28, 38 in.(508, 711, 965 mm)
38 in.(965, mm)
H 38, 48, 58 in.(965, 1219, 1473 mm)
Depth Reference Chart
D
Depth Available
H
Width
H
Width
H
Width
Non-BussedPull Section
BussedPull Section
Bussed Pull Sectionwith Utility Compartment
Through-Bus Fed
Non-Bussed and Bussed Pull Sections
Through-Bus FedDistribution Sections
Molded Case Circuit Breakers forCombination Motor StarterApplications
Application Note: ETI instantaneous- trip circuit breakersare recommended for use in combinationmotor starters to provide selective shortcircuit protection for the motor branch cir-cuit. The adjustable instantaneous-trip
feature provides for a trip setting slightlyabove the peak motor inrush current.With this setting, no delay is introducedin opening the circuit when the faultoccurs. Since these circuit breakers haveno time-delay trip element, they must beused in conjunction with, and immedi-ately ahead of, the motor-running over-current protective device.
The voltage and interrupting rating of thecircuit breaker should be checked toassure that they are adequate for theelectrical system. ETI circuit breakers areUL recognized components and must beused if the switchboard section is also tobe UL Listed.
Sentron™ SwitchboardsDistribution Sections — Type SB3 Only
Dimensions
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3
5
10
25
50
100
150
225
SingleSingleTwinBreakerType 480V bc240V220(208)V
1 32 (813)——— 5 (127) 0.5 0.5 2 32 (813)—5 (127)
2 2 3 32 (813)—5 (127)5 5 10 32 (813)—5 (127)
15 15 30 32 (813)—5 (127)30 30 60 32 (813)—5 (127)40 40 75 32 (813)—5 (127)50 50 100 32 (813)—5 (127)
ED b
FJ6, CFD
Min. SectionWidth inches (mm)
Mounting Height in Inches (mm)Maximum 3Ø Ratings
Table 7.45 ETI Circuit Breakers (Instantaneous Trip Only)For Branch-Circuit Use with AC Full Voltage Motor Starters
AmpereRating
30-30
SingleTwin SingleTwinWith NECFuse
With Dual-Element Fuse
With NECFuse
With Dual-Element Fuse
32— ——— — 2.50(64)3 7.5
Min.Sec.Width
Mounting Height in Inches (mm)Horsepower Ratings
240V AC 480V AC 240V AC 480V AC
Table 7.46 Vacu-Break Fusible SwitchesFor Branch Circuit Use with AC Combination Full Voltage Starters d
aThe 2.50 in. (64 mm) high unit is suitable for NEC Class H and K5 fuses only. Class R rejection type fuse holders are notavailable.
a
30-30 32——5.00(127)3 7.5
30-60 32——5.00(127)3–7.5 7.5–15
60-60 32——5.00(127)7.5 15
60-100 32——7.50(191)7.5–15 15–30
100-100 32——7.50(191)
7.50(191)
7.50(191)
7.50(191)
7.50(191)
7.50(191)
10.00(254)
15 30
100 32———
200 32——50 100
100
100
100
100
5 10
5–15 25
15 25
15–25 25–50
25 50
25 50
10.00(254)
10.00(254)
7.50(191)
25 50
200-200
400
600
32———
—
—
—
—
— —
—
—
— —
10.00(254)50
FJ6 c
b100,000 kA at 480V with E–Frame and CFD–Frame breakers.c65,000 kA at 480V with F–Frame Breakers.d100,000 kA at 480V with Class J or Class RK5 fuses.
50
75
15.00(381)15.00(381)
15.00(381)15.00(381)
38
38
NEMAStarter Size
0 — 5 b(127)
32(813)
10(254)
32(813)
15(381)
32(813)
15(381)
32(813)
5 b(127)
32(813)
Left Right
0 0
1 —
1 0
1 1
2 —
2 0
2 1
2 2
3 —
3 0
3 1
3 2
3 3
4 —
Min. Encl.WidthIn. (mm)
Unit spaceMtg. Ht.In. (mm)
Table 7.47 Full Voltage Non–Reversing Starters Class A20
NEMAStarterSize
0
220(208)V
Voltage AC
240V 480V
1
2
3
4
37.5
102540
37.5
153050
5102550
100
Table 7.48 Maximum 3 PhaseHorsepower Rating
a Increase to 7.50 in. (191 mm) when pilot light or controltransformer is required.
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Dimensions
ED2, ED4, ED6,HED4, HHED6
7.50(191)
1 to 6 1 to 8✔ ✔
Max.AmpereRating
100
BreakerType
Mounting
Number ofBreakersFor Width
38 Inches(965 mm)Plug-InFixed
32 Inches(813 mm)
Unit Space in Inches(mm)
Table 7.49 Individually Mounted Molded CircuitBreakers
CED6 12.50(318)
1 to 6 1 to 8✔ ✔
FXD2, FD6, HFD6,HHFD6
10.00(254)
1 to 4 1 to 6✔ ✔
250CFD6 15.00
(381)1 to 4 1 to 6✔ ✔
RXD6, RD6, HRD6, HHRXD6
27.50(699)
1 or 2 1 or 2✔ —2000
JXD2, JXD6, JD6, HJD6, SJD6, HHJXD6,HHJD6, SHJD6
12.50(318)
1 or 2 1 or 2✔ ✔
400
CJD6, SCJD6 20.00(508)
1 or 2 1 or 2✔ ✔
LXD6, LD6, HLD6,SLD6, HHLXD6,HHLD6, SHLD6
12.50(318)
1 or 2 1 or 2✔ ✔
600
CLD6, SCLD6 20.00(508)
1 or 2 1 or 2✔ ✔
✔ ✔
NXD6, ND6, HND6,SND6, HHNXD6,HHND6, SHND6
22.50(572)
1 or 2 1 or 2✔ ✔
1200
CND6, SCND6 22.50(572)
1 or 2 1 or 2✔ ✔
MXD6, MD6, HMD6,SMD6, HHMXD6,HHMD6, SHMD6
22.50(572)
1 or 2 1 or 2
800
CMD6, SCMD6 22.50(572)
1 or 2 1 or 2✔ ✔
PXD6, PD6, HPD6,SPD6, HHPXD6,HHPD6, SHNPD6
27.50(699)
1 or 2 1 or 2✔ —
1600
CPD6 27.50(699)
1 or 2 1 or 2✔ —
1-10 — #14 Cu. or1-10 — #15AI.
1
AmpereRating
Number of BarrelsPer Phase
100
1-750 — 250 kcmil or2-250 kcmil — 3/0 Cu.-AI.
1 400
1-750 — 250 kcmil or2-250 kcmil — 3/0 Cu.-AI.
2 600
1-750 kcmil — 4/0 Cu.-AI. or2-3/0 — 400 kcmil AI.or2-3/0 — 300 kcmil Cu.
3 800
1-750 kcmil — 4/0 Cu.-AI. or2-3/0 — 400 kcmil AI.or2-3/0 — 300 kcmil Cu.
41200
1-350 kcmil — #16 Cu.-AI 1 225
1-750 kcmil — 3/0 Cu.-AI. 61600
1-750 kcmil — 3/0 Cu.-AI. 72000
Wires per Barrel
Table 7.50 Standard Branch Load ConnectorsBolt-On and Plug-In
1 Transition section required when main disconnect is a service section with the following:
Molded Case Circuit Breaker 400A-3200AVacu-Break Switch 800A-1200AHCP Switch 400A-1200ABolted Pressure Switch 800A-4000ALow Voltage Power Air Circuit Breaker 800A-4000AInsulated Case 800-4000A
78 in (1982 mm) from floor max. allowed by NEC 380-8(a)CL
Sentron™ SwitchboardsDistribution Sections — Type RCIII
Dimensions
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32.00 (812.8) CUB38.00 (965.2) CUB
12.50(317.5)
12.50(317.5)
6 4 2 1 3 5
68 4 2 1 3 5 7
32.00 (812.8) CUB38.00 (965.2) CUB
10.00(254)
10.00(254)
6 4 2 1 3 5
68 4 2 1 3 5 7
32.00 (812.8) CUB38.00 (965.2) CUB
10.00(254)
10.00(254)
4 2 1 3
6 4 2 1 3 5
32.00 (812.8) CUB38.00 (965.2) CUB
12.50(317.5)
12.50(317.5)
2 1
2 1
32.00 (812.8) CUB38.00 (965.2) CUB
7.50(190.5)
7.50(190.5)
6 4 2 1 3 5
68 4 2 1 3 5 7
32.00 (812.8) CUB38.00 (965.2) CUB
20.00(508)
20.00(508)
2 1
2 1
32.00 (812.8) CUB38.00 (965.2) CUB
22.50(571.5)
22.50(571.5)
2 1
2 1
38.00 (965.2) CUB
27.50(698.5)
2 1
38.00 (965.2) CUB
27.50(698.5)
2 1
(100A) ED2, ED4, ED6, HED4, HHED6Stationary or plug-in mounted 5.0 in.(127.0 mm) minimum blank cover aboveis required when this is top row of circuitbreakers.
(100A) CED6Stationary or plug-in mounted 5.0 in.(127.0 mm) minimum blank cover aboveis required when this is top row of circuitbreakers.
(250A) FXD6, FD6, HFD6, HHFD6Stationary or plug-in mounted 2.5 in.(63.5 mm) minimum blank cover aboveis required when this is top row of circuitbreakers.
(250A) CFD6Stationary or plug-in mounted 2.5 in.(63.5 mm) minimum blank cover aboveis required when this is top row of circuitbreakers.
(400A) JXD2, JXD6, JD6, HJD6, HHJD6,HHJXD6, SJD6, SHJD6a(600A) LXD6, LD6, HLD6, HHLD6,HHLXD6, SLD6, SHLD6Stationary or plug-in mounted 2.5 in.(63.5 mm) minimum blank cover aboveis required when this is top row of circuitbreakers.
(400A) CJD6, SCJD6a(600A) CLD6, SCLD6Stationary or plug-in mounted 2.5 in.(63.5 mm) minimum blank cover aboveis required when this is top row of circuitbreakers.
(800A) MD6, MXD6, HMD6, SMD6,SHMD6, CMD6, SCMD6a(1200A) ND6, NXD6, HND6, SND6,SHND6, CND6, SCND6Stationary mounted only may be mounted in top position.
(1600A) PD6, PXD6, HPD6, SPD6, SHPD6,CPD6Stationary mounted only may be mounted in top position.
(2000A) RD6, RXD6, HRD6, HHRXD6Stationary mounted only may be mounted in top position.
Note:Numbers on breaker positions indicatesequence in which standard designpicks out correct bus and covers forparticular quantity of breakers or provi-sions required. Space only not avail-able.
a Smaller frame breakers may be mixed with largerframe breakers.
Circuit Breaker, Series “D” Arrangements
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DimensionsType RL Drawout CircuitBreakers
Table 7.51
RL800throughRL2000
RL800throughRL2000
RL800throughRL2000
RL800throughRL2000
RLF800throughRLF2000
RLF800throughRLF2000
RLF800throughRLF2000
RLF800throughRLF2000
Non-Fusible Fusible
A
B
C
D
Table 7.52 Type RCIII Distribution Sections for RL and Breakers
Ampere Rating
800 to 2000
RL
SB
Breaker Type W2 W3 D2 D3 D4HeightH1
Dimensions in Inches (mm)
Conduit AreaWidthW1
DepthD1
90.0 (2286) 25.0 (635) 58.0 (1473) 19.0 (483) 3.0 (76) 2.5 (64)13.0 (330)15.0 (381)
42.5 (1080)40.5 (1029)
Ratings for Both Type RL and SBBreakers
J Maximum thru bus rating –– 4000AJ Maximum section rating –– 4000AJ Maximum voltage rating –– 600V
Type SB Insulated Case Circuit Breakers100% Rated, Stationary and Drawout
6 High 800A Frame
Combination 800 & 2000AFrames
Combination 800 – 2000AFrames
4 High 2000A Frame
Sentron™ SwitchboardsDistribution Sections — Type RCIII
Dimensions
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Table 7.53 Panel Mounted Vacu-Break Mounting Height
Ampere Rating240V or 600V
Mounting Heightin Inches (mm)
30/30
60/60
100/100
200
200/200
400
600
7.50 (191)
10.00 (254)
15.00 (381)
Table 7.54 Type RCIII Distribution Sections for Two & Three High Vacu-Break, Two High Bolted Pressure Switches
Ampere Rating
800 to 2000Vacu-Break
Bolted Pressure
Switch Type W2 W3 D2 D3 D4HeightH1
Dimensions in Inches (mm)
Conduit AreaWidthW1
DepthD1
Unit SpaceH2
90.0 (2286) 38.0 (965) 48.0 (1219) or 58.0 (1473)
55.0 (1397) 32 (813) 3 (76) 2.5 (64)22 (559) or 32 (813)7.5 (191)or 17.5 (445)
23.5 (597)
38 (965)
Vacu-Break Switches Bolted Pressure Switches
100 – 600 Ampere Switches 800 & 1200 Ampere Switches
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Sentron™ SwitchboardsTie Sections
Dimensions
Table 7.55 Type RCIII Type BreakerSection with RLF LV Power Breaker
AmpereRating
800 to4000
HeightH1
Dimensions in Inches (mm)
WidthW1
DepthD1
90.0 (2286) 38.0 (965) 58.0 (1473)
Power Circuit Breaker Type RLF –– Draw-Out Fused
TieDevice
WD
H
AmpereRating
400 to 3200
HeightH
Dimensions in Inches (mm)
WidthW
DepthD
90.0 (2286) 38.0 (965) 38.0 (965)48.0 (1219)58.0 (1473)
Table 7.56 Molded Case Circuit Breakers
AmpereRating
400 to 4000
HeightH
Dimensions in Inches (mm)
WidthW
DepthD
90.0 (2286) 38.0 (965)
46.0 (1168)
38.0 (965)48.0 (1219)58.0 (1473)
Table 7.57 Insulated Case Circuit Breakers
5000
AmpereRating
800 to 2000
HeightH
Dimensions in Inches (mm)
WidthW
DepthD
38.0 (965)38.0 (965)48.0 (1219)58.0 (1473)2500 to
400090.0 (2286) 46.0 (965)
5000a 52.0 (965) 48.0 (1219)58.0 (1473)
Table 7.58 Bolted Pressure Switchesb
a Not UL Listed.b Fusible or Non Fusible.
Molded Case Circuit Breakers, Insulated Case Circuit Breakers, Bolted Pressure Switches
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Sentron™ SwitchboardsService Entrance Busway
DimensionsAvailable For Types SB3and RCIII OnlySiemens Sentron™ busway is ideal forservice entrance use with Siemens TypesSB3 and RClll switchboards. It is a low-reactance power busway available withaluminum or copper bars in 3-phase, 3-wire or 3-phase, 4-wire configuration,with or without ground bar.
Consult Section 10, beginning on page177 for complete details on SiemensSentron™ Busway.
Dimensions and Phase Sequence
The drawings below show the phasesequence and the location of the center-line of the busway opening foreach configuration, referenced to the
switchboard front and side planes.Phasing shown conforms to NEMA stan-dards and is preferred, unless alternatephasing is required by special customerterminations.
38.0 in.28.0 in.20.0 in.
(965 mm)(711 mm)(508 mm)
All widths
NCBA
SB3 Switchboard Busway Phasing Front to Rear 400 – 4000 Amperes
38.0 in.28.0 in.20.0 in.
(965 mm)(711 mm)(508 mm)
All widths
A B C N
SB3 Switchboard BuswayPhasing Left to Right400 – 4000 Amperes
58.0 in.48.0 in.
(1473 mm)(1219 mm)
19.0 in.(483 mm)
A B C N
SB3 or RCIII Switchboard BuswayPhasing Left to Right400 – 4000 Amperes
58.0 in.48.0 in.
(1473 mm)(1219 mm)
19.0 in.(483 mm)
NCBA
SB3 or RCIII Switchboard BuswayPhasing Front to Rear 400 – 4000 Amperes
NEC Section 230-95 requires ground faultprotection on all service disconnectsrated 1000 amperes and larger in 600volt class switchboards when fed by asolidly grounded wye system of morethan 150 volts to ground. Ground faultprotection is required on 480 and 600volt, 3-phase 3-wire, i.e., no neutral bus,when the serving transformer is wyeconnected. There is an exception to this rule: Groundfault protection is not required on firepumps or continuous industrial loadswhere a non-orderly shutdown wouldcause a hazard. Health care facilities, such as, hospitalsrequire additional levels of ground faultprotection. These requirements aredescribed in NEC article 517. In the 1990 NEC, new sections 215-10and 240-13 were added requiring groundfault protection on all 1000 ampere andlarger devices, breakers, and switches,applied in a system as described above,unless there is ground fault protectionupstream.Many utilities use a grounded wye sec-ondary transformer and bring a connec-tion from the grounded midpoint to theservice section ground bar. When this is the case, ground fault protection is required. For a 1000 ampere or larger 480 volt, 3-phase 3-wire service section, an inquiryshould be made to determine if the utility is using a 3-wire delta secondarytransformer. Should this be the case, no ground fault protection is required.
Sentron™ SwitchboardsGround Fault Protection
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WARNING: The following should be performed only by qualified personnel asdefined in N.E.C. Article 100. The ground fault sensor (GFS), ground fault relay (GFR),must be installed as in drawing above.
1. Disconnect Main Power Source.2. Remove the neutral disconnect link.
Make sure the neutral is groundedonly by the main bonding jumper,which must be on the line side of the sensor.
3. Close all branch devices.4. Using a “megger” type meter,
measure the resistance of the load phase and neutral to ground. This is to ensure that no groundconnections exist in the system.Resistance readings of (1) Megohmor greater are preferred.
5. Re-install the neutral disconnect link.6. Open all branch devices.7. Connect the main power source.
8. To Test The Entire System.a. Check for control power.
(LED should be illuminated).b. Press the “push to test” switch
on the relay.c. The trip indicator should go to
the “tripped” position and thedisconnect device should operate.
d. Release the “push to test” switch and return the trip indicatorto the “reset” position.
e. Reset or “close” the disconnectdevice for normal operation of the switchboard.
9. This test meets the requirements ofthe National Electrical Code Section230-95 (C).
Ground Fault Relay
GFS #1, is the standard locationGFS #2, alternate location for GFS
An automatic throwover system providespower to a common load from two ormore sources such as utility sources andgenerator sources. In most systemsthere is a period of time from approxi-mately 1 to 5 seconds where the load iscompletely without power as the sourcesare switched. Thus it is not a “UPS”(uninterruptable power supply) systemalthough most UPS systems incorporatea transfer scheme as a part of their sys-tem. Generally, this is sufficient for mostloads other than computers which cannotstand even a momentary outage. Basically, the purpose for having an auto-matic transfer system is to providepower to critical loads by continuouslymonitoring the utility source for propervoltage and either switching to an alter-nate utility source or starting and switch-ing to an on-site generator when thevoltage fails. In more elaborate systemsother source parameters such as phasefailure, phase reversal, frequency, andreverse power might be monitored. Also,several sources might be used with cor-responding main and tie breakers-eachsource will have a main, and each pair ofmains will have a tie. The transfer system will generally feedonly the critical load to minimize theframe size of the breakers involved.However, they may be located anywherein the distribution system and anythingmay be considered “critical load”,depending on the application and userpreference. A two-device transfer scheme generallyconsists of a normal (utility) main and anemergency (generator) main with no tie.The system sends a generator enginestart signal and may also have a cool-down timer, after retransfer to utilitypower, as an option. If the generator failsthe time delay or retransfer to utilitypower is by-passed. A three-device transfer scheme generallyconsists of two main utility breakers andone tie breaker. Normally, the two mainsare closed and the tie is open. Upon fail-ure of either source that main opens andthe tie closes. Upon restoration of utilitysource the tie opens and the open maincloses. The breakers are electrically inter-locked such that any two may be closedat one time. Usually, no generators areinvolved and in more elaborate systems,momentary paralleling of sources may beused. The source sensing and logic con-trols are very similar and may include thephase failure, phase reversal, and under-voltage sensing. A time delay on transfer
to ride out momentary fluctuations, and atime delay on re-transfer to utility toinsure that the power has stabilized, isstandard. An “auto-manual” selectorswitch is provided such that the systemwill operate automatically and the manualopen-close push buttons are bypassed in“auto” and “manual”. All automatic func-tions are by-passed except the electricalinterlock and only the open - close push-buttons are functioning. This “manual” position allows for trans-fer under other than emergency condi-tions for maintenance, testing, etc. Pilotlights located near the open - close but-tons provide indications of the positionsof each breaker. Each main source powers a control trans-former and a control power selector relayswitches to whichever source is availableto insure that the system has controlpower. Each control transformer has acontrol power disconnect so if the sys-tem is placed in “manual”, all controlpower may be shut off for work on thecontrol system without disturbing thepower to the load. In the event of a short circuit or overcurrent condition such that one of the
breakers trips, the system does nottransfer to another source and ifrequested, alarm contacts may be pro-vided to energize a lockout relay and pilotlight, which must be manually resetbefore the system can be returned tonormal. Remote alarm contacts are alsoavailable if this lockout feature isrequested. By-pass contacts are provided whendraw-out breakers are used so that thesystem will function as close to normalas possible when a breaker is drawn out.Contacts for remote position indicationcan be provided for customer use. A transfer switch (such as ASCO,Russelectric, etc.) accomplishes thesame purpose as a two device transferscheme except it generally has no“open” position. These switches mustbe closed on normal or closed on emer-gency — there is no middle position. On a two device transfer scheme usingbreakers, it is possible to have bothbreakers open and thus isolate the loadfrom either source. A transfer switchcannot be used in a standard doubleended switchboard with a tie.
Sentron™ SwitchboardsAutomatic Throwover System — Types SB3 and RCIII Only
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Standard Function
Electrical interlock3—Breakers 2—Breakers
3—Breakers 2—Breakers
Table 7.59 Automatic Throwover Available Functions
✓Mechanical interlock
✓
——
—
—
—
Time delay on transferTime delay on retransfer ✓
✓Voltage sensing both sourcesPhase sensing both sources ✓
✓Auto-manual switch with lightControl transformers and transfer relay ✓Bypass contacts on drawout breakersEngine start contacts
✓
Bypass of retransfer if emergency fails
✓Open-close pushbuttons and lights
Optional Function
Frequency sensingRemote alarm/lockout contactsSynchronization checkCurrent sensing ✓
✓✓✓
A and B auxilliary contactsReverse power relay
✓✓
Ground fault ✓Phase indicating lights ✓
✓
✓
✓✓
—
✓
✓
✓
✓✓
✓
✓
✓
✓
✓
✓
✓✓
✓✓✓✓✓✓✓✓
Load voltage releaseTime delay for engine cool downTest switch—loss of normalPlant exerciser
Applying SB1, SB2, and SB3Switchboards
The electrical system is bound to haveunique requirements that affect thedesign of the switchboard and theselection of the protective devices thatgo into it. However, some design aspectsare common to all systems, and can beconsidered in more general terms.
Ampacity and Future LoadRequirements
In addition to meeting the demands ofpresent loads, the switchboard should besized to accommodate reasonable futureload additions without major modifica-tions. Expansion can usually be built intothe switchboard easily. The main protec-tive device frame size or continuous cur-rent rating, and the switchboardthrough-bus can be sized on the basis ofanticipated future load demand. Trip unitsor fuses of lower ratings can be installedto meet present load conditions and sim-ply changed in the future as loadincreases, up to the maximum switch-board ratings. Most protective devices are designed tooperate continuously at 80% of their rat-ing when installed in a switchboard.Bolted pressure switches, power circuitbreakers, encased systems breakers, andsome molded case breakers, have beendesigned for operation at 100% of theircurrent rating when housed in an ade-quately ventilated enclosure. However,since most protective devices are testedin a 40°C (104°F) ambient, derating maybe necessary if the operating conditionsnormally exceed this temperature.
Selective Tripping
The switchboard and its protectivedevices must be capable of withstandingand interrupting the short circuit faultcurrent that the electrical system candeliver to the switchboard’s location inthe system. In a fully rated system, both the main and branch feeder protective devicesmust have adequate interrupting capacityfor the available fault current, and theswitchboard bus should be braced for
the same maximum fault current.Without selective tripping coordinationbetween the main and branch protectivedevices, both the main and branch devicemay trip under fault conditions. The NEC permits the application of seriesrated devices in switchboards, Seriesrated devices are those which have beenseries tested to prove that a higher ratedupstream device will protect a lowerrated downstream device.In the selective system, though, the mainand branch devices are selected so thatunder fault condition, the branch devicenormally clears the fault while the mainremains closed. Only in unusual events,such as a fault on the main switchboardbus, or a failure of the branch device tooperate, would the main device trip.Service continuity is maximized by theselective trip design.
Circuit Breaker Selectivity
Selectivity between main and branch cir-cuit breakers can be achieved up to theinstantaneous trip setting by building ashort-time delay into the main breakertrip characteristics, or properly choosingand setting instantaneous trip characteris-tics, to allow the branch breakers instan-taneous trip to clear the fault first. The short-time delay features are avail-able on solid-state molded case circuitbreakers, such as Siemens Sentron™Digital Circuit breakers, SB EncasedSystems Breakers and Type RL LowVoltage Power Circuit Breakers. Withthese breakers, a solid-state mainbreaker, and standard thermal-magneticbranch breakers can be combined toachieve an economical selective system.
Ground Fault Protection Design
While the National Electrical Code stipu-lates only that ground fault protection beprovided on the main disconnect device,the switchboard designer should con-sider service continuity when applyingground fault protection. Ground fault
protection can be achieved using groundfault relays, or integral ground fault insolid-state trip circuit breakers. Ground fault protection normally used onmain disconnect devices has a pick-uptrip from 200 to 1200 amperes, andoperating times from six to thirty cycles. For systems in which continuity of ser-vice is critical, ground fault protection isrecommended on both the main andbranch feeder devices. For hospitals, the National Electric Code, Section 517-13 requires this ground fault relayingon both the main and feeder circuits. A time coordinated scheme between themain and branch devices will provideselective coordination to maintaincontinuity of service.
Enclosure Types
Type 1 enclosures are available for indoorapplications and Type 3R for outdoor andwet locations. NEC Section 384-4 requires switchboardsto be located in dedicated rooms andspaces. Sections 384-7 and 384-8 requireplacement to reduce to a minimum theprobability of communicating fire to adja-cent combustible materials including thefloor. Section 110-16(a) defines specificworking clearances and exit doors to theswitchboard area.
Factory Testing
Prior to shipment each switchboard istested to UL 891, the dead front switch-board standard. A dielectric test is con-ducted at two times the switchboardvoltage rating plus 1000 volts. Externaldevice ground fault systems are tested at57% control voltage to ensure operationunder severe ground faults.Note: NEC Section 230-95 requires theground fault system to also be fieldtested by the installer and a permanentrecord kept of this test using the fieldtest instructions provided with theswitchboard.
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1. Scope
Furnish and install, as shown on theplans, a service and distributionswitchboard as specified herein, forthe system indicated below: w 120 / 240V w 1-phase w 3-wire w 120 / 208V w 3-phase w 4-wire w 277 / 480V w _-phase w _-wire w 480Vw ____ V
Configuration
The switchboard enclosure shall be:w NEMA 1 indoor constructionw NEMA 3R outdoor constructionw Non walk-in front accessiblew Non walk-in front & rear accessibleSwitchboard shall be of the modulartype construction with the requirednumber of vertical sections boltedtogether to form one metal enclosedrigid switchboard. The sides, top andrear shall be covered with removablescrew-on code gauge steel plates.Switchboard shall include all protectivedevices and equipment as listed ondrawings with necessary interconnec-tions, instrumentation and controlwiring. All groups of control wiresleaving the switchboard shall be pro-vided with terminal blocks with suit-able numbering strips. Switchboard shall be constructed inaccordance with the latest NEMA PB-2and UL 891 standards.
2. Bus Requirements
The bus shall be w tin plated alu-minum, w silver plated copper ofsufficient size to limit the temperaturerise to 65˚C, based on UL tests. Thebus shall be braced for w 50,000,w 65,000, w 75,000, w 100,000, w 200,000 amperes symmetrical andsupported to withstand mechanicalforces exerted during short circuit con-ditions when directly connected to apower source having the indicatedavailable short circuit current. Provide afull capacity neutral where a neutral isindicated on the drawings. The through bus on the end distribu-tion section shall be extended and pre-drilled to allow the addition of futuresections with standard splice plates. Ground bus and lugs shall be fur-nished. The ground bus shall extendthe entire length of the switchboardand shall be firmly secured to eachvertical section.
3. Incoming Service
1. Underground Service:To isolate incoming undergroundservice conductors, an undergroundcable pull or auxiliary section shallbe used. This section shall be of the w nonbussed, w bussed typeand shall be sealable per local utility requirements. w screw-typemechanical lugs, w compressionlugs to terminate, w aluminum, w copper cable, shall be furnishedas detailed on the plans.
2. Overhead Service:A. Cable entry
w screw-type mechanical lugs w compression lugs to termi-nate w aluminum w coppercable shall be furnished asdetailed on the plans. Wherenecessary provide top cable pullbox which shall be sealable perlocal utility requirements.
B. Busway EntrySwitchboard to be fed bySiemens Sentron ____ amperew copper, w aluminum busway,as detailed on plans, w andother sections of this specifica-tion. The switchboard manu-facturer shall be responsible forcoordination, proper phasing andinternal bussing to the incomingbusway.
Service Section
The service section shall be designed forthe system parameters indicated in arti-cle 1.0, shall have a w ____ meteringcompartment per utility requirements, w user metering as indicated in article____, w and shall have a main protectivedevice indicated in article ____.
4. Distribution Sections (Select one of Item #B)
Bl. Switchboard Type Panel- Mounted,Front Accessible.
Switchboard shall be of Siemens SB1type, or approved equal. Individualsections shall be front accessible, notless than 20” deep, and rear of allsections shall align. Incoming line ter-mination, main device connection andall bolts used to join current-carryingparts shall be installed so as to permitservicing from the front only so thatno rear access is required. The branchdevices shall be front removable andpanel mounted with line and load sideconnections front accessible.
B2. Switchboard Type Panel- Mounted Rear Accessible
Switchboard shall be of Siemens SB2 or SB3 type, or approved equal.Individual sections shall be front andrear accessible, not less than 38"deep, and both the front and rear ofall sections shall align. The branchdevices shall be front removable andpanel mounted with line and loadside connections front accessible.The bus and main device connec-tions shall be rear accessible.
B3. Switchboard Type IndividuallyMounted, Rear Accessible(Fixed mounted devices).
Switchboard shall be of SiemensRCIII type, or approved equal. Allsections shall align front and rear. Alldisconnect devices, main and feed-ers, shall be mounted individually atthe front of the switchboard and shallbe rear accessible. The load termi-nals of each feeder device shall beextended by means of insulated busbars through the bus compartment into the rear cable compartment.
Optional
w barriers shall be provided betweenbus and cable compartment.w barriers shall be provided betweenvertical sections. w barriers shall be provided betweendevices and bus compartment.w barriers shall be provided betweenindividual devices (RC III only).
B4. Switchboard Type IndividuallyMounted Rear Accessible(Insulated Case Breaker).
Switchboard shall be of SiemensRCIII type or approved equal. All sec-tions shall be aligned front and rear.Insulated case breakers shall be indi-vidually mounted in their own com-partments. Barriers shall be providedat the sides and rear of each com-partment and a horizontal barrierbetween breakers in same verticalsection. Breaker shall be accessiblethrough hinged metal door on eachbreaker compartment.The insulated case circuit breakerassembly shall be Siemens SBEncased Systems Type, and shall beself-contained to permit quickreplacement or inspection and maintenance of breakers without de-energizing the entire switchboard.
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B4. (cont’d)
The drawout design of circuit breakershall be such that it makes it possibleto place the breakers in a fully with-drawn, disengaged, test or engagedposition. The load side of each feeder breaker shall have bus barsextending from rear of the primarydisconnect through the buscompartment in to the rear cablecompartment.
Optional:
w barriers shall be provided betweenthe bus and cable compartment andbetween vertical section.w provide traveling type breakerlifting hoist and track mounted on top of switchboard. w provide portable lifting device.
B5. Switchboard Type IndividuallyMounted Rear Accessible(Drawout Power Circuit Breaker)
Switchboard shall be of SiemensRCIII type or approved equal. All sec-tions shall be aligned front and rear.Each vertical section forming part ofswitchboard lineup shall have one ormore individual breaker or instrumentcompartments, a centralized mainbus compartment and a rear cablingcompartment. Drawout breakersshall be Siemens RL Power CircuitBreakers with Static Trip III trip unit,and shall be individually mounted intheir own compartments. Metal barri-ers shall be provided at the sides andrear of each compartment and a hori-zontal metal barrier between break-ers in the same vertical section. Thebreaker shall be accessible through ahinged metal door on each breakercompartment. The drawout mechanism of powercircuit breaker shall be such that itcan be moved from connect throughtest to disconnect position withoutopening the door, In the “connect”position, both the primary and sec-ondary disconnects are engaged. Inthe “test” position, the primary dis-connect terminals are disengaged;however, the secondary disconnectsare maintained to permit the opera-tion of the circuit breaker. In the “dis-connect” position, the primary andsecondary disconnects are engaged.
In the “test” position, the primarydisconnect terminals are disengaged:however, the secondary disconnectsare maintained to permit the opera-tion of the circuit breaker. In the“disconnect” position, the primaryand secondary disconnects are disen-gaged and separated a safe distancefrom the corresponding stationaryterminals. In the “fully withdrawn”position, both primary and secondarycontacts are disconnected and thecircuit breaker may be inspected as itcan be removed for more completeaccessibility. The load side of each feeder breakershall have bus bars extending fromthe rear of the primary disconnectthrough the bus compartment in tothe rear cable compartment.
Optional
w barriers shall be provided betweenthe bus and cable compartment andbetween vertical sections. w provide traveling type breaker lifting hoist and track mounted on top of switchboard. w provide portable lifting device.
5. Main Protective Device (Select one of Item #C)
The main protective device, to beinstalled in the main device section,shall be as indicated below:C-1 Molded case circuit breaker shall
be of the quick-make, quick-break,trip-free, (heavy duty) (extra heavyduty) (solid state) type. It shall bean ______ frame (2-pole) (3-pole)600-volt breaker with a trip cur-rent rating of:w 400A w 1200Aw 600A w 1600Aw 800A w 2000Aw 1000A w 3200Aof an interrupting capacity of notless than ______ amperes RMSsymmetrical at the system voltage.
C-2 Fusible switch of the quick-make,quick-break type. It shall be a (2-pole) (3-pole) (240V) (600V)Vacu-Break unit with a continuouscurrent rating of (400) (600) (800)(1200) amperes and with ______ampere class ______ fuses, suit-able for application on a systemwith ______ amperes symmetricalavailable fault current. The follow-ing accessory features are to beincluded:w Shunt Tripw Ground fault relayw Other ______ (list)
C-3 Bolted pressure switch of thequick-make, quick-break type. It shall be a w 2-pole, w 3-pole,w 240V, w 480V unit with acontinuous current rating of:w 800A w 2500Aw 1200A w 3000Aw 1600A w 4000Aw 2000Aand with _______ ampere Class Lfuses suitable for application on a system with ______ amperessymmetrical available faultcurrent.The following accessory featuresare to be included:w Shunt Tripw Ground fault relayw Electrical operatorw Other _______ (list)
C-4 Type RL low voltage power circuitbreaker with a drawout frame anda current rating of:w 600A w 3000Aw 800A w 4000Aw 1600A w 5000Aw 2000A
It shall be w manually w electricallyoperated power circuit breaker witha solid-state Static-Trip Ill device andan interrupting capacity of _______amperes RMS symmetrical at thesystem voltage.The following accessory featuresare to be included:w Short time delayw Integral ground fault tripw Shunt trip (M.O. C / B only)w Other _______ (list)
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C-5 Type SB Encased Systems insu-lated case circuit breaker with a w stationary or w drawout frame.Frame size to be ___ ampere, 3-pole, 600V with a trip currentrating of:w 400A w 2500Aw 600A w 2500Aw 800 A w 3000Aw 1000 A w 3500Aw 1200A w 4000Aw 1600A w 5000AIt shall be a w manually, w elec-trically operated breaker with asolid state trip device, storedenergy type, trip free, an interrupt-ing capacity of not less than_______ amperes RMS symmetri-cal at the line system voltage.The following accessory featuresare to be included:w Short time delayw Integral ground fault tripw Fault trip indicatorsw Other ______ (list)
6. Branch Protective Devices (Select one of Item #D)
All molded case circuit breakers,fusible switches, insulated case circuitbreakers, bolted pressure switches,low voltage power circuit breaker, and / or motor starter units used as aprotective device in a branch circuitwill meet the requirements of theappropriate paragraph below.D-1 Molded case circuit breakers shall
be of quick-make, quick-break,trip-free w thermal magnetic type,w solid-state, with frame, trip andvoltage ratings, either 2-pole or 3-pole, as indicated on the plans.All breakers shall have an inter-rupting capacity of not less than______ amperes RMS symmetri-cal at the system voltage Allbreakers shall be removable fromthe front of the switchboard with-out disturbing adjacent units. Theswitchboard shall have space orprovisions for future units asshown on the plans.
D-2 Current limiting circuit breakersshall provide inverse time delay,instantaneous circuit protection,and also limit the let-through I2t toa value less than I2t of one-halfcycle wave of the symmetricalprospective current without anyfusible elements, Breakers shallhave an interrupting capacity ofnot less than ______ amperesRMS symmetrical at the systemvoltage.
D-3 Fusible switches shall be quick-make, quick-break units utilizingthe double-break principle of cir-cuit rupturing to minimize arcingand pitting and shall conform tothe ratings shown on the plans. Each switch shall have an individ-ual door over the front, equippedwith a voidable interlock that pre-vents the door from being openedwhen the switch is in the ONposition unless the interlock ispurposely defeated by activationof the voiding mechanism. Allswitches shall have externallyoperated handles. Switches shallbe equipped with w NEC stan-dard, w Class R rejection typefuse holders, and Class w H, w K1, w K5, w RK1, w RK5, w J, w T and w L fuses ofampere rating and type as indi-cated on the plans suitable forapplication on system with ______ampere symmetrical availablefault current.
D-4 Each bolted pressure switch shallbe the quick-make, quick-breaktype, equipped with Class L fusessuitable for application on a sys-tem with ______ amperes sym-metrical available fault current.Ampere ratings to be as shownon the plans.
D-5 Each low voltage power air circuitbreaker shall be (drawoutmounted) stored energy type, tripfree, (manually operated) (electri-cally operated) with solid-state tripdevice. Frame sizes and trip rat-ings to be as shown on the plans.All breakers to have an interrupt-ing capacity of not less than_______ amperes symmetrical atthe rated voltage.
D-6 Each insulated case circuit breakershall be (drawout) (stationary)frame. stored energy type, tripfree, (manually operated) (electri-cally operated) with solid- statetrip device. Frame sizes and tripratings to be as shown on theplans. All breakers to have aninterrupting capacity of not lessthan _______ amperes symmetri-cal at the rated voltage.
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6. Branch Protective Devices (cont’d)
D-7 Motor Starters (SB3Switchboards only)
NEMA rated Siemens magneticstarters shall be furnished of thetype and horsepower ratings asindicated on the plans. Thermaloverload relays on starters shallbe (non-compensated bimetallictype with selector for either autoor manual reset) (ambient temper-ature compensated bimetallic typewith selector for either auto ormanual resets). Three overloadrelays will be furnished on eachstarter. The overload heater ele-ments will be sized from theactual motor nameplate data.The following accessory featureswill be furnished on each starter: w Individual control powertransformers w Pilot light(s) w Auxiliary interlocks w _______ NO _______ NC Pushbuttons, selector switchesand other pilot devices shall be fur-nished as indicated on the plans. The disconnect device shall bemounted immediately above itsassociated starter, and the unitdoors will be mechanically inter-locked to prevent access withoutde-energizing the unit. (The inter-locking means shall be voidableby qualified personnel.) Thedisconnecting devices will be: w Circuit Breakers Type ETI molded case circuitbreakers will be furnished forcombination starter. w Fusible Switches Type VB fusible switch shall befurnished for combination starters.Switches will meet the require-ments of Article D-3.
The disconnect shall be factory wired tothe starter unit. Wiring to be:w Class 1Aw Class 1B
7. Ground Fault Protection
A) General
Furnish and install in the service equip-ment and / or switchboard Ground Faultprotection and indication equipment asspecified herein and as shown on draw-ings in accordance with NEC #230-95. All parts of the systems specified shallbe UL Listed. All new Ground Fault Protection andIndication equipment shall be factoryinstalled, wired and tested by the switchboard manufacturer.
B) Ground Fault Relay
The Ground Fault Relay shall be a line-powered, self-contained device and shallbe designed to mount in the front panelof the equipment in which it is installed. The Ground Fault Relay shall be suppliedwith 120 VAC control power from a suitably rated control transformer whoseprimary is connected phase-to-phase.When control power is present, a“Control Power” indicator shall be lit on the relay panel. The Ground Fault Relay shall receive asignal from the Sensor proportional to the magnitude of the fault current. Pick-up (trip) and time delay settings shall be incrementally adjustable 100 through1200 amperes and 0.10 to 1 second,respectively in various ranges. The ground fault relay shall be providedwith an integral test panel with “push totest” and “shunt trip bypass” pushbut-tons for testing the system with or with-out tripping the protective device. w Ground fault relays shall be zoneinterlocked.
8. Metering Equipment (When Required)
Provide a multi-function, high accuracydigital power metering instrumentationmodule equipped with an LCD display.The power metering module shall providesimultaneous measurements for current,voltage, and power parameters. Powermeter shall be Siemens type w 4300 w 4700 w 4720 equipped with a com-munications port for connection to cus-tomer’s energy-management network.
9. General
The complete switchboard shall bephosphatized and finished with light gray.ASA-61 paint. Each switchboard section shall have anameplate permanently affixed to it,listing the following information:
Name of manufacturerSystem voltageAmpacity TypeManufacturer’s shop order number and date
Each section of switchboard shall bear a UL listing mark, where qualified, and a short circuit rating label. In addition, the front, side, rear and top of each switchboard section will have aDANGER label in accordance with NEMAStandard PB-2.
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