604060/011 enJuly '99

ABB SACE L.V.

SACE Emax.A system that’s opento any solution.

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SACE Emax: the reference standardin air circuit-breakers

SACE Emax low-voltage air circuit-breakershave been designed and manufactured byABB SACE L.V. with the aim of satisfying themost advanced market requirements.

Building on the highly-acclaimed resultsobtained by the SACE Isomax S series ofmoulded-case circuit-breakers, this new seriesextends the characteristics of safety, reliability,integration and coordination that distinguishthe entire ABB SACE L.V. low-voltage productfamily to high rated current values.

The SACE Emax series won the favour of userson all markets as soon as it was launched,proving itself to be the perfect solution to therequirements of even the most technologicallysophisticated installations.Thanks to its new versions and performancefeatures, combined with a further-increasedrange of accessories, SACE Emax makes itpossible to anticipate the design trends of thefuture.

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The SACE Emax series benefits fromABB SACE L.V.’s experience in the manufactureof air circuit- breakers, which began in the lateFifties with the SACE Otomax series - the firstair circuit-breaker designed and manufacturedentirely in Italy. The series comprised aswitchgear range with rated currents of 1250 to5000 amps and a maximum breaking capacityof 100 kA.The success of this first series was echoed bythat of the G30 series in the Seventies, whichwas the first to offer electronic releasesalongside traditional electromagnetic releases.

This takes us to 1979, when ABB SACE L.V.started manufacturing the SACE Novomaxseries - the first high-performance current-limiting air circuit-breakers on the market.

1989 marked the arrival of the SACEMegamax, a significant step forwards thatintroduced PR1 microprocessor-based releasesinstalled on-board the circuit-breakers. Thanksto this innovation, air circuit-breakers weretransformed from a simple component to anintegral and sophisticated part of a complex“system”.

The strengths of the current SACE Emax seriesbuild on over half a century’s developmentand are the logical consequence of a designand manufacturing philosophy firmly focusedon innovation, safety and reliability.

1955Otomax:Iu = 1250 … 5000A,Icu = up to 100kA

1971G30: … fromthermomagnetic toelectronic releases

1979Novomax: increasedperformance (6300 A)and introduction ofcurrent-limiting circuit-breakers

1989Megamax: new designof microprocessor-based releases (PR1)

TODAYEmax: technologicalprogress with high-performance.Iu = 800 … 6300A,Icu = 40 ... 150kA.Maximised modularstrengths andstandardisation.

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Continually developing qualityand performance

The compactdimensions of a

SACE Emax are aresult of its perfect

integration ofcomponents and

performance

• Customised solutions with safety in mind;- possibility of using two opening coils (dualOC) for special environments such ashospitals

- SACE SOR Test Unit for checking that allthe components of the opening coil areworking correctly at regular intervals;

• Ease of monitoring using accessories for theelectronic releases:- PR010/T test, programming and parameterreadout unit

- PR010/K signalling unit that also providesload control function.

Sliding contacts

Microprocessor-basedprotection release

Pushbutton for manualopening operation

Lever for loading theclosing springs manually

Mechanical indicatorshowing circuit breakeropen “O” or closed “I”

Compartment for rackingin/out operation

Indicator showingsprings loaded orreleased

Pushbutton formanual closingoperation

The results achieved by ABB SACE L.V. withthe SACE Emax series speak louder thanwords regarding the continual progress madeby the range through important newdevelopments such as:• Circuit-breakers for special applications with

voltages of up to 1000 V in alternatingcurrent;

• Range of direct current switch-disconnectors;

• Range of switchgear in accordance withANSI standards also certified by theUnderwriter Laboratories in conformity withUL Standard 1066;

• Two possible ways of calculating the earthfault current:- Residual (using function G of the release)- Source Ground Return (with externaltoroid coil on the transformer star centre’searth connection);

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Anti-insertionlock

Earthingcontact

Safetyshutters

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A complete range to satisfy any installation

The SACE Emax series is offered in a completerange of rated currents and available as fivedifferent models in fixed, withdrawable, threeand four-pole versions. Characterised byuninterrupted rated currents of from 800 to6300 amps and breaking capacities of up to150 kA, the series is able to satisfy the mostdemanding requirements of modern industrialand naval installations. Each model is availablein a variety of different circuit-breaker optionsthat have the same dimensions but differentrated currents and breaking capacities. Lookedat from a manufacturing and use standpoint,SACE Emax circuit-breakers can be divided intotwo main categories of use: selective circuit-breakers and current-limiting circuit-breakers.The former make it possible to implementdifferent types of selectivity thanks to highshort-time withstand current values and theSACE PR111 and PR112 overcurrent releases.The different types of selectivity available are:current, energy, time and zone.

Series

Breaking capacityB= BaseN= NormalS= StandardH= High breaking

capacityV= Very high breaking

capacityL= Current-limiting

circuit-breaker

Rated uninterrupted current IuModel

The current-limiting circuit-breakers make itpossible to achieve a considerable reductionin the peak current compared to theprospective current and, therefore, to limit thespecific let-through energy. The resultantbenefits include a reduction in electrodynamicand thermal stresses, consequently making itpossible toreduce thedimensioningof theinstallation.

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Electrical characteristics

SACE Emax E1 SACE Emax E2Voltage

Rated service voltage Ue 690 ~ / 250 ~ [V]

Rated insulation voltage Ui 1000 [V]

Rated impulse withstand voltage Uimp 12 [kV]

Frequency f 50-60 [Hz]

Number of poles 3-4

Version Fixed - Withdrawable

Data common to the entire range

B

800

1250

100

40

40

36

36

40

40

36

36

36

-

84

84

75,6

B

n

296/386

324/414

42/50

65/80

Performance level

Currents

Rated uninterrupted Iu [A]

current (at 40 °C) [A]

[A]

[A]

[A]

Capacity of neutral pole for four-pole circuit-breakers [%Iu]

Rated ultimate short-circuit Icu 220/230/380/400/415 V~ [kA]

breaking capacity 440 V~ [kA]

500/660/690 V~ [kA]

250 V– [kA]

Rated service short-circuit Ics 220/230/380/400/415 V~ [kA]

breaking capacity 440 V~ [kA]

500/660/690 V~ [kA]

250 V– [kA]

Rated short-time Icw (1 s) [kA]

withstand current Icw (3 s) [kA]

Rated short-circuit making capacity Icm 220/230/380/400/415 V~ [kA]

(peak value) 440 V~ [kA]

500/660/690 V~ [kA]

Category of use (CEI EN 60947-2)

Isolation behaviour (CEI EN 60947-2)

Dimensions

Fixed: H = 418 mm -D = 302 mm L (3/4 poles) [mm]

Withdrawable: H = 461 mm - D = 396,5 mm L(3/4 poles) [mm]

Weight (circuit-breaker complete with releases and CT, excluding accessories)

Fixed 3/4 poles [kg]

Withdrawable 3/4 poles (including fixed part) [kg]

(1) A version with a 4000A neutral pole current capacity is available(2) The performance at 500 V is 100 kA

B N L

1600 1250 1250

2000 1600 1600

2000

100 100 100

40 65 130

40 65 110

40 55 85

40 55 -

40 65 130

40 65 110

40 55 65

40 55 -

40 55 10

40 40 -

84 143 286

84 143 242

84 121 187

B B A

n n n

296/386

324/414

46/55 46/55 45/53

72/89 72/89 70/87

E1 B E2 B-N E2 LRated uninterrupted current (at 40ºC), Iu [A]

Mechanical life

with regular routine maintenance [No. operations x 1000]

Frequency of operations [Operations per hour]

Electrical life (440 V~) [No. operations x 1000]

Frequency of operations [Operations per hour]

800 1250 1250 1600 2000 1250 1600 1250 16

25 25 25 25 25 20 20 20 2

60 60 60 60 60 60 60 60 6

10 10 15 12 10 4 3 12 1

30 30 30 30 30 20 20 20 2

Circuit-breaker model E1 E2

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SACE Emax E3 SACE Emax E4 SACE Emax E6

N S H L

2500 1250 1250 2000

3200 1600 1600 2500

2000 2000

2500 2500

3200 3200

100 100 100 100

65 75 100 130

65 75 100 110

65 75 85 85

65 75 75 -

65 75 85 130

65 75 85 110

65 75 85 65

65 75 75 -

65 75 75 15

65 65 65 -

143 165 220 286

143 165 220 242

143 165 187 187

B B B A

n n n n

404/530

432/558

68/80 68/80 68/80 67/79

100/125 100/125 100/125 100/120

S H

4000 3200

4000

50 (1) 50

75 100

75 100

75 85(2)

75 100

75 100

75 100

75 85(2)

75 100

75 100

65 65

165 220

165 220

165 187

B B

n n

566/656

594/684

95/115 95/115

147/190 147/190

H V

5000 3200

6300 4000

5000

6300

50 50

100 150

100 150

100 100

100 100

100 125

100 125

100 100

100 100

100 100

- -

220 330

220 330

220 220

B B

n n

782/908

810/936

140/170 140/170

210/260 210/260

E3 N-S-H E3 L E4 S-H E6 H-V1600 2000 2500 3200 2000 2500 3200 4000 3200 4000 5000 6300

20 20 20 20 15 15 15 15 12 12 12 12

60 60 60 60 60 60 60 60 60 60 60 60

10 9 8 6 2 1,8 7 5 5 4 3 2

20 20 20 20 20 20 10 10 10 10 10 10

E3 E4 E6

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An intelligent and flexible answerto all your protection requirements

SACE PR111 and SACE PR112microprocessor-basedovercurrent releasesAlongside its modern series of air circuit-breakers, ABB SACE L.V. presents a completeand innovative range of microprocessor-basedelectronic overcurrent releases, the SACEPR111 and PR112. Anyone installing SACEEmax circuit-breakers has the option ofchoosing the release that is best suited to theirinstallation needs in any given situation,together with the designer’s requirementsregarding safety and reliability. The advancesmade by electrical installations implementingdistributed intelligence systems has made the

role played by releases increasingly important,demanding that they offer:• high operating precision;• a wide range of settings;• complete protection against all types of faults;• measurement and monitoring of the main

electrical parameters;• dialogue with supervision and control

systems such as SACE SD-View 810.These functions are provided on SACE Emaxcircuit-breakers using the SACE PR111 andPR112 microprocessor-based releases, whichprovide protection functions against overloads(L), short-circuit’s (instantaneous I andselective S) and earth faults (G).

Maincharacteristics

Possibility of self-powered operation

High operating precision

Sensitivity to true root-mean-square value of the

current

Possibility of settingneutral to 100% of the

phases with ratedcurrents up to 4000 A

Advancedmicroprocessor

technology(8-bit for PR111

and 16-bit for PR112)

Integrated dialogue unit

SACE PR111

SACE PR112

Keyswitch selector for choosingread only mode (READ) or settingmode (EDIT)

L S I GL S I

PR111/P

L I

PR112/P

L S I G

PR112/PD

L S I

PR112/P

L S I

Microprocessor faultindicator

Auxiliary powersupply indicator

Dialogue indicators

Prealarm/alarmindicators

Connection toexternal unit(SACE PR010/Tand PR110/B)

Programming keys

Liquid crystal display

Rating plate showing therated current of the CTs forneutral and the serialnumber of the release

Testpushbutton

Protection functions foroperation indicators

Releaseovertemperatureindicator

Reset button

PR112/PD

L S I G

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PR111/PPR111/P

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Main characteristics of the releases

Protection releases give circuit-breakers theintelligence to manage the protection of circuits andusers.

L

S

I

G

Protection functions SACE PR111 SACE PR112

Overload protection withinverse long time-delay trip • •Selective short-circuit protectionwith inverse shorttime-delay trip • •Instantaneous short-circuit protectionwith adjustable trip current threshold • •

Residual • •Earth fault protection

Source groundreturn •

Thermal memory for functions L and S •

Measurements

Currents (phases, neutral and earth fault) •

Event and maintenance data marking

Event marking with time event occurred •

Events stored in chronological order •

Counting of number of operations and contact wear •

Communication with centralisedsupervision and control system(using dialogue unit)

Remote setting of parameters,protection functions,unit configuration and communication •Transmission of measurements, statuses andalarms from circuit-breaker to system •Transmission of events and maintenance datafrom circuit-breaker to system •

Self-test

Alarm and tripping for release overtemperature •

Alarm for microprocessor fault •

User interface

Parameter setting using DIP switches •Parameter setting using keysand liquid crystal display •

Alarm indication for functions L and S •Complete management of prealarmsand alarms for all protection andself-monitoring functions •Key for enabling usewith “READ” mode forconsultation only or “EDIT” mode forconsultation and setting •

Load control (with auxiliary unit)Connection-disconnection of loadsin relation to the value of the current passingthrough the circuit-breaker •

Zone selectivity

Can be activated for protection functions S and G •

Earth fault protectionA number of different options are available forearth fault protection:• using protection function “G” of the release:

in this case the earth current is calculated bythe release itself using the vector sum of thephase and neutral currents (“residual”method)

• using a special toroid coil that is installed onthe connection between the star centre andearth of the MV/LV transformer, with directreading of the earth leakage current (“Sourceground return”)

• using electronic residual-current relays froma SACE RCQ switchboard with separatetoroid coil.

This range of different options makes itpossible to cover every earth fault protectionand selectivity requirement.

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The growing complexity of installationstogether with the need for increasinglyefficient and safe switchgear has led ABBSACE L.V. to develop units that complete thefunctions offered by a microprocessor-basedrelease, the “brains” of a circuit-breaker.The SACE PR010/T and SACE PR010/K unitsare the result this product developmentapproach.

SACE PR010/T:fingertip controlThis unit is able to provide test, programmingand parameter readout functions for SACEEmax series protection releases.Thanks to its compact dimensions, simplicityof operation and handling, this unit isparticularly easy to use in all conditions, evenwhen the circuit-breaker is installed. The Testfunction, which can be implemented usingboth releases, makes it possible to check allthe protection functions in two different ways,

either manually or automatically,simultaneously monitoring whether themicroprocessor is operating correctly. It is alsopossible to store any test results of interest inthe unit itself and export them to a personalcomputer using the “report download”function. Parameters can only be set and readout on the PR112 range of releases.ABB SACE L.V. also supplies a floppy diskwith the unit containing the applicationsoftware for updating or adapting the Testunit in line with the development of newproducts.

SACE PR010/KThis is a signalling unit able to convert thedigital signals from the SACE PR112 release toelectric signals, thus making it possible tomonitor the status of the protection device,including remotely. The information providedmainly concerns the alarm conditions of allthe protection functions and the release’salarm situations. This unit also allows one toimplement a load control function that actsdirectly on the operating means of othercircuit-breakers installed downstream.The “intelligence” of the unit resides in thefact that it is able to recognise the type ofrelease concerned, enabling it to configureitself to suit the characteristics of the latter.

SACE PR010/K

Accessory units for overcurrentreleases:SACE PR010/T - SACE PR010/K

SACE PR010/T

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From releases to an integrated system

Microprocessor-based releases offeringmeasurement and dialogue functions are thefinal link in distributed control systems for lowand medium voltage electrical installations,based on the use of intelligent units connectedto one another using a local network.The new SACE PR112 releases also make itpossible to achieve integration in the “logic” ofthe centralised management system of theinstallations using circuit-breakers that aresuitable both for the protection andautomation of electrical installations.It is possible to control and monitor thefollowing using the dialogue unit:• circuit-breaker status• protection function parameters• number of operations (opening/closing)• value of the current interrupted• operating status of the release• prealarm/alarm indications• operating mechanism (opening/closing).

The microprocessor-based protection releasesin the SACE PR112/PD series inserted in theSACE SD-View 810 control system representABB SACE L.V.’s basic answer for the controland automation of electrical installations inindustry and the service sector.It is also possible to interface the SACE PR112/PD

release with the maincommunication protocolspresent on the market.

• circuit-breaker status• protection function

parameters• number of operations

(opening/closing)• value of the current

interrupted

• operating status ofthe release

• prealarm/alarmindications

• operatingmechanism (opening/closing).

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Main characteristics

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Accessories: a standard rangeto make customising simpler

The entire series ofSACE Emax circuit-breakers is served by asingle line ofaccessories. Inparticular, the electricalaccessories can beused both inalternating current anddirect currentapplications, and arealways installed fromthe front without theneed for any wiring.The ease with whichthe accessories can befitted also makesinstallation operationsfast and safe, suchthat even the endcustomer can carry outthe customisingnecessary in eachphase of aninstallation’s life. Thecurrent transformersfor the different ratedcurrents of thereleases are extremelyeasy to change,including by the endcustomer. What’smore, conversion kitsare available to obtaindifferent terminalsolutions and versions.

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IP54 protection doorcover

Lock for openposition

Lock for circuit breaker in racked-in/test isolated/racked-out position

Gearmotor for automatic loading ofclosing springs

Flange

Tamper-proof protective cover foropening and closing pushbuttons

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Mechanical indicationof overcurrent releasestripped

Duty releases

Mechanical operationcounter

Electrical indication ofcircuit-breaker open/closed

Homopolar toroid forearth conductor

Current transformer forexternal neutral conductor

Mechanical lockfor cell door

Interlock acrosscircuit-breakers

Padlock devicefor shutters

Electronic time-lag device forundervoltage release

15 additional auxiliarycontacts

Currenttransformer

Electrical indication ofcircuit-breaker racked in/test isolated/racked out

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These versions are based on the movingpart of the corresponding withdrawablecircuit-breaker on which all the breakingcomponents and the operating mechanismhave been replaced by simple connectionsbetween the top and bottom contacts. Theyare used as no-load isolators in situationswhere this function is provided for in theinstallation.

These versions are similar to isolatingtrolleys but with the bottom or top isolatingcontacts replaced by connections that areconnected in a short-circuit and earthed.They are used by temporarily racking theminto the fixed part of a withdrawable circuit-breaker for earthing the top or bottomterminals before carrying out maintenanceoperations on the external circuit.

Isolating trolley - CS

Earthing switch with making capacity - MTP

Earthing trolley - MT

These versions are based on the movingpart of the corresponding withdrawablecircuit-breaker without the overcurrentreleases and the top or bottom isolatingcontacts, which are replaced by connectionsthat short circuit and earth the phasesthrough the circuit-breaker. The earthingcircuit is dimensioned for a short-timecurrent equal to 60% of the maximum Icwof the circuit-breaker on which it is based.They are used for earthing duringinspection or maintenance work oninstallations where the earthing operationcould be performed in the presence ofresidual or return voltages.

Disconnectors only differ from automaticcircuit-breakers in not having anovercurrent release. They have the sameversions and range of accessories.

Switch-disconnectors- MS

Derived versions

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SACE Emax circuit-breakers for1000 V AC

The 1000 V AC circuit-breakers are based onthe standard range (rated service voltage up to690 V) and retain the same dimensions, usethe same accessories and have the same“names” plus the ending “/E”. They areavailable in fixed and withdrawable versionswith the three or four poles and areparticularly suitable for installation in specialenvironments such as mines, petrochemicalinstallations and for traction.

Electrical characteristics

Rated uninterrupted current Iu [A] 1600 2000 1250 1600 2000 1250 1600 2000 2500 3200 3200 4000

Rated service voltage Ue [V] 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000

Rated ultimate short-circuitbreaking capacity Icu [kA] 20 20 30 30 30 50 50 50 50 50 65 65

Rated service short-circuitbreaking capacity Ics [kA] 20 20 30 30 30 50 50 50 50 50 65 65

Rated short-timewithstand current Icw [kA] 20 20 30 30 30 50 50 50 50 50 65 65

E2B/E E2N/E E3H/E E4H/E

Special versions

Other versionsSACE Emax circuit-breakers can also besupplied to order in appropriate specialversions suitable for particularly aggressiveenvironments (SO

2 or H

2S, etc.) and for anti-

seismic installations.

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The range comprises power circuit-breakers with their related accessories,manufactured in accordance with ANSI standards C37.13, C37.16, C37.17and C 37.50, and certified in conformity with the UL1066 standard (LowVoltage AC and DC Power Circuit Breakers Used in Enclosures).The UL Listed SACE Emax series is suitable for use in electricalswitchboards in accordance with the UL 1558 and UL 891 standards.

Performance level B-A B-A N-A N-A S-A H-A S-A H-A V-A H-A V-A

Currents

Rated continuous current [A] 800 1600 1200 2000 1200 1200 3200 3200 3200 4000 4000

[A] 1200 1600 2500 1600 1600 3600 3600 3600 5000 5000

[A] 2000 2000

[A] 2500 2500

Rated short circuit current 240 V [kA] 42 42 65 65 85 85 85 100 100 125 125

480 V [kA] 42 42 50 50 65 85 65 85 100 85 125

600 V [kA] 35 42 50 50 65 65 65 85 85 85 85

Rated short time current [kA] 35 42 50 50 65 65 65 85 85 100 100

Overall dimensions

Fixed: H= 418 mm / 16.46 in

D= 302 mm / 11.89 in

W (3 poles) [mm/in] 296/11.65 296/11.65 404/15.91 566/22.28 782/30.79

Withdrawable: H= 461 mm /18.15 in

D= 396,5 mm /15.61 in

W (3 poles) [mm/in] 324/12.76 324/12.76 432/17.01 594/23.39 810/31.89

Weights (CB fitted with releases, RH terminals and CTs, accessories excluded)

Fixed 3 poles [Kg/Ibs] 42/93 46/101 68/150 95/209 140/309

Withdrawable 3 poles [Kg/Ibs] 65/143 72/159 100/220 147/324 210/463

E1 E2 E3 E4 E6

Specifications common to the entire rangeVoltagesRated maximum voltage 635 [V]Rated voltage 600 [V]Test voltage (1 min 50/60 Hz) 2,2 [kV]Frequency 50-60 [Hz]Number of poles 3Versions Fixed - Withdrawable

Rated continuous current [A] 800 1200 1200 1600 1200 1600 2000 2500 3200 3600 4000 5000

Mechanical life

[No. operations x 1000] 15 15 12 12 10 10 10 10 5 5 5 5

Electrical life

[No. operations x 1000] 10 10 10 10 10 10 8 8 5 5 5 3

E1 B-A E2 B-A/N-A E3 N-A/S-A/H-A E4 S-A/H-A/V-A E6 H-A/V-A

New range complying with ANSI standardsand UL certified

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They’ve passed the toughest exams.Here’s the proof

SACE Emax circuit-breakers and theiraccessories comply with the internationalStandards IEC 947, EN 60947 (harmonised in17 countries by CENELEC), CEI EN 60947 andIEC 1000, together with the followingEuropean directives:

• “Low Voltage Directives” (LVD) No. 73/23/CEE (and subsequent variants);

• “Electromagnetic Compatibility Directive”(EMC) No. 89/336/CEE.

The switchgear complies with therequirements set out in the regulations forinstallations on ships and has been approvedby the following Naval Registers:

• RINA (Registro Italiano Navale)• Det Norske Veritas• Bureau Veritas• Germanischer Lloyd• Lloyd’s Register of Shipping• Polskj Reiestr Statkow

This certification of conformity with theproduct Standards mentioned is carried out, incompliance with European Standard EN 45011,by the Italian certification body ACAE (Asso-ciazione per la Certificazione delle Apparec-chiature Elettriche) recognised by theEuropean body LOVAG (Low VoltageAgreement Group).

The ABB SACE L.V. Quality System complieswith the ISO 9001 international Standard(model for quality assurance in design,development, manufacture, installation andservice) and the equivalent European StandardEN ISO 9001 and its Italian version UNI ENISO 9001.

The third-party certifying body is RINA-QUACER. ABB SACE obtained its first three-year certification in 1990 and is now on itsthird certification.The Frosinone factory has achieved ISO 14001environmental certification.

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SACE Emax presents all the benefits of the linePoint by point

Easyinstallation

The number of mountingpoints required has beenreduced compared to theprevious series and theyhave all been placed on thebase of the circuit-breakerto make it easier to installthe circuit-breakers inswitchboards.The availability of a widerange of terminals makes itpossible to build wall-mounted switchboards orswitchboards that can beaccessed from the rear withrear connections.The circuit-breakers areavailable with differentcombinations of top andbottom terminals to meetspecial requirements.

Easycustomisation

Accessory installationoperations have beenoptimised and simplifiedthanks to a range of specialconstruction features. Allthe electrical accessories arefitted from the front. Thismakes it simpler to fit theaccessories and means thattheir installation can beplanned in the lastinstallation phase. What’smore, the simplicity andsafety of the operationsmeans that the endcustomer can also carry outany customisation thatmight become necessaryduring the life of theinstallation. To this end, thecurrent transformers for thedifferent rated currents arealso extremely easy tochange.

Optimal answers toproblems of design,operation andmanagement.

The protection releasesfeature sophisticatedprotection functions andwide adjustment ranges.

Particularly compactdimensions.

The same height anddepth for the entireseries.

The same accessoriesfor the entire range bothfor DC and AC.

Operator safety isensured by a multitudeof different features,including:• double insulation

between accessoriesand power circuit;

• key locks and padlockdevices on operatingmechanisms;

• racking out with doorclosed onwithdrawable circuit-breakers;

• anti-insertion locks forpreventing the insertionof moving parts in fixedparts with differentrated currents.

Accessories that don’tneed wiring.

The entire series of SACEEmax air circuit-breakers isnot only characterised byhaving constantdimensions but the sameheight and depth as well.This facilitates the designphases, making for easierfabrication withstandardised supportingframes. The sheet steelstructure of the circuit-breaker is extremelycompact and enablessignificant space savings. Asingle front flange for theentire series simplifies theconstruction ofswitchboard doors,enabling a single type ofdrilling to be used.

Modular strengthsand compactdimensions

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Optimalwarehousemanagement

Stock management in thewarehouses of electricalmaterial distributors andcustomers who need tomanage the maintenanceand spare parts of largeinstallations is made muchsimpler and rationalised bythe adoption of highly-effective solutions,including:• a single line of

accessories for the entireseries

• an opening and closingrelease that can be usedas a single accessory.The function isdetermined exclusivelyby the mounting position

• duty releases that can bepowered in DC or ACwithout any modification

• single fixed part for eachcircuit-breaker model(even if they havedifferent rated currentsand different breakingcapacities)

• interchangeability ofSACE PR111 and PR112overcurrent releases

• conversion kit fordifferent terminal andversion solutions.

Efficient andsafe installations

SACE Emax circuit-breakersprovide a high level ofsafety for those operatingon the installation:• a series of locks (key

locks or padlockdevices) ensurecomplete safety againstany incorrect operations

• the accessories areinstalled from the frontand operator safety isensured by the doubleinsulation thatguarantees totalsegregation of theaccessory seatings fromthe power circuit

• circuit-breakers can alsobe racked out with thecompartment doorclosed

• option of mechanicalinterlocking across twoor three circuit-breakers,irrespective of theirmodel or version (fixedor withdrawable) usingflexible cables. Thecircuit-breakers can beinstalled vertically orhorizontally.

• different protectiongrades available,including IP54,implemented using atransparent tamper-proofguard for fitting on thefront of the switchboard

Easy and safemaintenance

Just a few simpleoperations allow fullinspection of the arcingchamber and powercontacts with the circuit-breaker out of service;(withdrawable versions caneven be racked out withthe door closed).Isolation of the accessorycompartment from thepower circuit prevents anypossibility of accidentalcontact with live parts.

The intelligence of thenew-design SACE PR111and PR112 microprocessor-based overcurrent releasesenables: very highoperating precision, a wideadjustment range,protection against all typesof faults and monitoring ofthe main electricalparameters, operationwithout the need for anauxiliary power supply,sensitivity to the true root-mean-square value of thecurrent, and the option ofdialogue with computerisedsupervision and controlsystems such as the SACESD-View 810.

Intelligentprotection

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ABB SACE L.V. SPAHead Office: Via Baioni, 3524123 Bergamo - ItalyTel.: +39 035 395111Telex: 301627 ABBSAC ITelefax: +39 035 395306/+39 035 395433

http://www.abb.it/sace-lv

ITS

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0406

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