instruction sheet 769-500 - s & c electric · ljnderst,anding safety-alert messages. ..... 4...

S&C Switch Operators - Type AS-1A

For Installation

I TABLE OF CONTENTS I Section Page Number

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SAFETY INFORMATION

LJnderst,anding Safety-Alert Messages. .................... 4 Following Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Replacement Instructions and Labels. . . . . . . . . . . . . . . . . . . . . 4

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MANUAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Section Page Number

INSPECTION SCHEDCLE AND PROCEDURES.. . . . . . . . . . . .18 CHECKING SWITCH OPERATOR AND

ALD~~TI-RLPTER@ SWITCH POSITIONS. . . . . . . . . . . . . . . . .20 APPENDIX

Amended Travel-Limit AGustment Procedure for Switch Operators Furnished with Source-Transfer Control Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 0

I INTRODUCTION I Qualified Persons

1 A '

The equipment covered by this publication must be installed, operated, and maintained by qualified persons who are knowledgeable in the installation, operation, and maintenance of overhead electric power distribution equipment along with the associated hazards. A qualified person is one who is trained and competent in:

The skills and techniques necessary to distinguish exposed live parts from non-live parts of electrical equipment. The skills and techniques necessary to determine the proper approach distances corresponding to the voltages to which the qualified person will be exposed. The proper use of the special precautionary techniques, personal protective equipment, insulating and shielding materials, and insulated tools for working on or near exposed energized parts of electrical equipment. These instructions are intended only for such quali-

fied persons. They are not intended to be a substitute for adequate training and experience in safety procedures for this t m e of equipment.

The S&C Switch Operator--?Srpe AS-IA is a high-speed operator, with an operating time not exceeding ,75 sec- ond. It is expressly designed for power operation of S&C Alduti-Rupter Switches-Outdoor Distribution and S&C Alduti-Rupter Switches with Power Fuses-Outdoor Dis- tribution, having rotating type operating mechanisms.

The high operating speed of the S&C Switch Opera- tor-me AS-1A provides sufficient moving-contact velocity in the Alduti-Rupter Switch interrupters to ensure full interrupting capability and long operating life. The operator's high operating speed also provides adequate closing velocity for 25/34.5-kv and 34.5-kv Three-Pole Side-Break Integer Style and Three-Pole Vertical-Break Integer Style switches such that the Side-Break Integer Style switches have a one-time duty-cycle fault-closing rating of 15,000 amperes rms asymmetrical, and the Verti- cal-Break Integer Style switches have one-time duty-cycle fault-closing ratings of 20,000 or 30,000 amperes rms asymmetrical for switches rated 600 amperes or 1200 amperes, respectively.

For power operation of S&C Alduti-Rupter Switches-Outdoor Distribution and S&C Alduti-Rupter Switches with Power Fuses-Outdoor Distribution, having reciprocating type operating mechanisms, the S&C Switch Operator-me AS-I0 is offered.

Supersedes lnstructlon Sheet 769-500 dated 9-7-93 01996

INSTRUCTION SHEET 769400 S&C ELECTRIC COMPANY Chicago of 23 S&C ELECTRIC CANADA LTD. Toronto April 22, 1996

S&C Switch Operators - Type AS-I A

I INTRODUCTION -Continued I For power operation of S&C (lircuit-Switchers, S&C

For power operation of S&C Line-Ruptersrbl, the S&C Switch Operators-Qpes CS-1A and CS-10 are available.

Switch Operator--Type LS-2 is available. For switches of other manufacture, the S&C, Switch

Operator-Qpe LS-1 is available. The LS-1 is a low-speed operator, with an operating time of 4 to 7 seconds. It is designed for power operation of outdoor high-voltage dis- connects and interrupter switches for which this low operating speed is appropriate.

following features as standard: 0 Built-in internal decoupling mechanism, operable by

integral external selector handle, with padlocking provisions and automatic mechanical locking of output shaft. Laminated safety-plate window permits "bisible air-gap" verification of complete disengagement of output shaft. Open-close pushbuttons, externally operable, with pad- lockable cover. Built-in nonremovable, foldaway manual operating

Mechanical position indicators for both switch operator and Alduti-Rupter Switch "open" and "closed" positions.

S&C Switch Operators--Type AS-1A include the

handle.

Non-reset electric operation counter. Laminated safety-plate window for inspection of built-

in internal decoupling mechanism, mechanical position indicators, and operation counter (and position-indicating lamps, if furnished as accessories). Foolproof recoupling. Impossible with position-indexing drums to couple the switch operator and the Alduti-Rupter Switch "unsynchronized." Fingertip precision adjustment of output-shaft rotation using self-locking spring-biased cams. Eight-pole auxiliary switch, coupled to motor, with fingertip precision adjustnwnt of individual contacts using self-locking spring-biased cams. Antifriction bearings throughout; tapered roller bearings for all high-torque gear-train shafts. Two-pole pull-out fuseholders for space heater and (except for 12-volt dc models) motor circuit. (For l h o l t dc models, a two-pole disconnect switch is used in series with a motor-circuit, fuse.) Weatherproof, dustproof enclosure. equipped with 120/240-volt ac space heater, factory-connected for 240-volt ac operation. Can readily be field reconnected for 120-volt ac operation. Tamper-resistant design-welded enclosure; baffled louvers; gasketed. flanged door openings; camaction door latch; provisions for padlocking. Foul-weather accessibility t,o interior of enclosure. Access is by door rather than by removal of entire enclosure.

SWITCH OPERATORS-Type AS-1A

Application Maximum Accelerating M~~~~or',"u"e""a:'.

Schematic

Rating of

Number Drawing Number Diagram Wiring

Catalog Current, Motor and

High-Voltage Rated Control Operating Time, Control Voltage High-Voltage Device Amperes Voltage, Inch-Lbs. Device

769.500 INSTRUCTION SHEET of 23 S&C ELECTRIC COMPANY Chicago April 22, 1996 S&C ELECTRIC CANADA LTD. Toronto

I INTRODUCTION -Continued I S&C, Switch Operator Catalog Number 38854R4 suffix Voltage

includes a 12-volt dc battery and constant-burden battery charger for connection to an S&C 30-Volt-Ampere Poten- tial Device or other 120-volt 60-hertz source.

-A 48 volts dc -B 125 volts dc -D 115 volts 60 hertz

Switch operator catalog numbers are suffixed with one -E 230 volts 60 hertz or more letters. The first letter following the catalog number designates the motor and control voltage (except Other suffix letters which may be added to the switch for Catalog Number 38854R4): operator catalog number indicate the inclusion of

optional accessories as follows:

ACCESSORIES

Item Suffix Added to Switch Operator Catalog Number

I Deletlon of Externally Operable Open-Close Pushbuttons I -J I I Space Heater Thermostat I -K I I Key Interlock wlth Switch, locks Aldutl-Rupter Swttch open and dlsconnects motor-control clrcult@ I -L I I Posltlon-Indicating Lamps (one red, one green), mounted lnslde the enclosure I ” I I Extra Auxihary Swltch (Indlvldually adjustable contacts), 4-PST (coupled to motor)@@ I -Q I

Source-Transfer Control Compatibility Permlts use of swltch operator wlth S&C Mlcro-AT Source-Transfer Control in Weather- proof Enclosure@@

Duplex Receptacle and Conventence-Light Lampholder wlth Swltch -V

-u 1 -

I Extra Auxlhary Switch (indivldually adpstable contacts), 8-PST (coupled to Aldutl-Rupter Switch)@ I -W I Remote-Control Blocking Swltch, prevents remote operation of swltch operator when the protectwe cover for the externally mounted open-close pushbuttons IS open@

~~~ ~

Extra Auxthary Swltch (mdlvldually adlustable contacts), 12-PST (coupled to Aldutl-Rupter Switch)@ ~~

-2 - 0 Q p e A S I A Swltch Operators speclfied wlth source-transfer con- @ Avadable as an optional accessory only w~th Type AS-1A Switch trol compatlbllity (suffix “-U1“) cannot be furnished wlth key inter- Operator Catalog Numbers 38847R4-D and 3884iR4-E. utilizlng 115-volt lock wlth switch (suffix “-L“), extra auxiliary swltch coupled to motor 60-hertz or 230-volt 60-hertz motor and control voltage (suffix “-Q”), or remote-control blockmg swltch (suffix “-P”). @ Rrqulred for some automatic-transfer and sectionalmng schemes. the 12-PST verslon (suffix ”-Z”) IS speclfied, and vice versa

@ The 8-PST extra auxiliary swtch (suffix “-W”) cannot be furnished if

INSTRUCTION SHEET 769.500 S&C ELECTRIC COMPANY Chicago of 23 S&C ELECTRIC CANADA LTD. Toronto April 22, 1996

~~ ~

S&C Switch Operators - Type AS-IA

I SAFETY INFORMATION I Understanding Safety-Alert Messages There are several types of safety-alert messages which may appear throughout this instruction sheet as well as on labels and tags attached to the ‘bpe ASIA Switch Operat,or. Familiarize yourself with these types of messages and the importance of the various signal words, as explained below.

hazards which will likely result in serious personal injury or death if instructions, including recomnwnded

instruct,ions, including recommended precautions, are

which c m result in minor personal injury or product or property damage if instructions, including recom-

ments that, if not followed, can result in product or property damage if instructions are not followed.

Following Safety Instructions

Thoroughly and carefully read this instruction sheet before installing your S&C Type AS-1A Switch Opera- tor.

If you do not understand any portion of this instruction sheet and need assistance, contact your nearest S&C Sales Office or S&C Authorized Distributor, or call S&C Headquarters at (312) 338-1000, Monday through Friday between 8:30 AM and 5:OO PM Central Standard Time. (In C,anada, call S&C Electric Canada at (416) 249-9171.)

Replacement Instructions and Labels If you need additional copies of this instruction sheet, contact your nearest S&C Sales Office or S&C Authorized Distributor, or call S&C Headquarters.

It is important that any missing, damaged, or faded labels on the equipment be replaced immediately. Replacement labels are available by contacting your nearest S&C Sales Office, S&C, Aut,horized Distributor, S&C Headquarters, or S&C Electric Canada.


Step 1Mount the switch operator as indicated on the erectiondrawing. Then attach a flexible coupling to the outputshaft of the switch operator. See Figure 1. Thread theattachment bolts through the flexible coupling plate andthrough the coupling flange on the output shaft. Tightenthe bolts to draw the flexible plate flush against the flange;

this will deform the threads in the flexible plate, resultingin a binding, nonslip connection. Install and tighten theself-locking nuts. Do not use lockwashers with the flexiblecoupling attachment bolts.

Remove the clamp bolts and set aside the detachablehalf of the flexible coupling.

Attachment bolt

I

Vertical operating pipe

\ Flexible couplino“Clamp bolts

\ . -. . I mi,..ri..r ..A+ CI..,...,C

Coupling flange

Self-locking nut I A

Pushbutton /protective cover /

Alduti-Rupter switchposition indicators

Alignment arrow

Manual operating

\Switch operatornameplate

Figure 1. txterlor view 01 Swncn operaror.

INSTRUCTION SHEET 769.50()

S&C ELECTRIC COMPANY l ChicagoS&C ELECTRIC CANADA LTD. l Toronto

of 23April 22, 1996

S&C Switch Operators - Type AS-IAINSTALLATION - Continued I

Step 2Make certain that the cutting tips of the piercing setscrews do not protrude through (1) the body of the flexi-ble coupling on the switch operator output shaft and (2)the body of the universal coupling and thrust bearing atthe upper guide bearing and universal coupling groups (orthe body of the rigid coupling if an intermediate guidebearing assembly is used).

Pass the lowest section of vertical operating pipe upthrough the guide bearing and then through the thrustbearing and insert the pipe section into the universal cou-pling (or, if an intermediate guide bearing assembly isused, pass the vertical-operating-pipe section up throughthe guide bearing and insert the pipe section into therigid coupling). Do not tighten the coupling clamp orpiercing set screw at this time. (The lower end of the

lowest section of vertical operating pipe will, of course,be cradled in the open flexible coupling attached to theoutput shaft of the switch operator.)

While holding the pipe section in this position, andwith the thrust bearing resting on the guide bearing,tighten the piercing set screw in the thrust bearing,piercing the pipe, and continue turning until a firm resis-tance is felt. At the universal coupling, tighten theclamp bolt to final tightness, then tighten the associatedpiercing set screw, piercing the pipe, and continue turn-ing until a firm resistance is felt. (If an intermediateguide bearing assembly is used, tighten the clamp bolton the rigid coupling to permanent tightness; thentighten the associated piercing set screw, piercing thepipe, and continue turning until a firm resistance is felt.)

Pushbutton protectivecover (open)

Remote-control blockingswitch (Catalog NumberSuffix ‘I-Y”)

Open/close pushbuttons

Arrow plate I

Extra auxilliary switch,8-PST (Catalog NumberSuffix “W”); 12-PST version(Catalog Number Suffix ‘I-Z”)is similar

Motor contactor,opening

Motor contactor, /closing

Operation counter(optional on earlier models)

Position-indexing drums

(not visible in photo)

- A u x i l i a r y s w i t c h , 8-PST

- Extra auxiliary switch,4-PST (Catalog NumberSuffix “-Q”)

Motor-circuit two-polepull-out fuseholder

PConduit-entranceplate

Manual operating handle interlock switchand mechanical blocking rods

igure 2. Interior views of switch operator.

769-500 INSTRUCTION SHEET of 23April 22, 1996

S&C ELECTRIC COMPANY l Chicago -S&C ELECTRIC CANADA LTD. l Toronto !m

INSTALLATION - Continued I

Step 3Mark the conduit-entrance location for the control-circuitwiring on the conduit-entrance plate in the bottom of theswitch operator enclosure. See Figure 2.

Remove the conduit-entrance plate and cut out therequired opening. Replace the plate and make up theentrance fittings. Apply sealing compound (providedwith each switch operator) when replacing the conduit-entrance plate. Verify that the entrance fittings areproperly sealed to prevent water ingress.

Step 4

two-pole pull-out fuseholders for the motorcircuit and space-heater circuit. See Figure 2.

Failure to remove these fuseholders can result inaccidental energizing of the operator after the externalconnections have been completed.

Reinsert the fuseholders only when directed to doso in the steps that follow.

Pushbutton protective cover (close

uplex receptacle and convenience-ght lampholder with switch (Catalogumber Suffix “-V)

Remove the blocking from the motor contactors.Connect the external control-circuit wiring (including

space-heater source leads) to the terminal blocks of theswitch operator in accordance with the wiring diagramfurnished. For 12-volt dc models, mount the battery in thebattery compartment and connect it to the battery cableswhich are located at the rear of the battery compartment.

tstructions, switch operator.avel-limit adjustment

\

Motor ,

Instructionmanual and holden

D o o r l a t c h - -

Spare fuses (6)A

Filter holder/-

Space-heater circuilt two-pole \pull-out fuseholder Space heater

These illustrations are not applicableto 12-volt dc models. Those modelsutilize a number of different compo-nent parts and a different internallayout. Among the differences is in-clusion of a constant-burden batterycharger mounted on a swingout pan-el, as well as the use of a separatetwo-pole control-source disconnectswitch in series with control-sourcefuses (located on the inside rearwall) in lieu of the motor-circuit two-oole pull-out fuseholder. Those mod-sls, further, include a separate com-oartment beneath the enclosure,Nhich houses the 12-volt dc battery.

Brake-release

Tel*minal block

solenoid

INSTRUCTION SHEET 76&5()0S&C ELECTRIC COMPANY l ChicagoS&C ELECTRIC CANADA LTD. l Toronto

of 23April 22, 1996

S&C Switch Operators - Type AS-1AINSTALLATION - Continued

Direct-current switch operators are furnished withpolarity-sensitive motors.

Observe the polarities indicated on the wiring dia-gram for switch operator motor when making externalcontrol-circuit connections.

requirements, as specified in S&C Data Bulletin 769-60and on the switch operator wiring diagram furnished.

Do not make unauthorized changes in the wiring of thisswitch operator. Unauthorized changes may result inequipment damage or personal injury.

To make a control-circuit modification, request arevised wiring diagram from S&C Electric Company.Diagram must meet with the approval of both the userand S&C Electric Company.

1 MANUAL OPERATION 1Before proceeding further, familiarize yourself with theoperation of the manual operating handle and the selectorhandle, as described on the switch operator nameplate on

the right-hand side of the enclosure and in the followingSteps 5, 6, and 7. See Figures 3 and 4.

Piercing set screws

Vertical operating pipe-

Flexible Coupling

Manual ooeratina handle ‘I J)

Latch knob /

,_“._. ..-..-.-

(in coupled position)

Switch operatornameplate

769400 INSTRUCTION SHEET of 23April 22, 1996


1 MANUAL OPERATION -Continued 1

Do not manually open or close the switch operatorwhile the Alduti-Rupter Switch is energized.

Operating the switch under reduced operatingspeed may cause excessive arcing, resulting in short-ened interrupter life, or damage to the interrupters.

If switch operator control voltage is not availableand emergency manual opening is absolutely required,crank the manual operating handle rapidly throughoutits full travel. Do not stop or hesitate part way.

To avoid closing into a fault, never close the switchmanually.

Step 5To operate manually: Pull the latch knob on the hubof the manual operating handle and pivot the handleforward slightly from its storage position. Release thelatch knob while continuing to pivot the handle forwardto lock it into the cranking position. See Figure 3. (Asthe handle is pivoted forward the motor brake ismechanically released, both leads of the control sourceare automatically disconnected, and-except for 12-voltde models-both the “opening” and “closing” motorcontactors are mechanically blocked in the openposition.)

If desired, during manual operation, the switch opera-tor may also be disconnected from the control source byremoving the motor-circuit two-pole pull-out fuseholder,located on the right-hand inside wall of the enclosure.

To return the manual operating handle to its storageposition, pull the latch knob and pivot the handle approxi-mately 90 degrees. The handle will then be disengagedfrom the switch operator and may be rotated freely ineither direction to its storage position. Complete thehandle storage by pivoting the operating handle backwardapproximately 90 degrees until it latches in the storageposition.

Note that the manual operating handle may be disen-gaged from the switch operator mechanism at any posi-tion of the handle.

Always padlock the handle in its storage position.

Step 6To decouple: The integral external selector handle, foroperation of the built-in internal decoupling mechanism,is located on the right-hand side of the switch operatorenclosure. See Figure 3. Swing the selector handle uprightand slowly rotate it clockwise 50 degrees to the decou-pled position. See Figure 4. This decouples the switchoperator mechanism from the switch operator outputshaft. Then lower the selector handle to engage the lock-ing tab. When thus decoupled, the switch operator may be

operated either manually or electrically without operatingthe Alduti-Rupter Switch. When the selector handle is inthe decoupled position, the output shaft is prevented frommoving by a mechanical locking device located within theswitch operator enclosure. During the intermediate seg-ment of the selector handle travel, which includes theposition at which actual disengagement (or engagement)of the internal decoupling mechanism occurs, the motor-circuit source leads are momentarily disconnected and(except for 12-volt de models) both the “opening” and“closing” motor contactors are mechanically blocked inthe open position. Visual inspection, through the observa-tion window, will verify whether the internal decouplingmechanism is in the coupled or decoupled position. SeeFigure 5. Padlock the selector handle in-either position.

Selector handle(being turned todecoupled position)

INSTRUCTION SHEET 769.500S&C ELECTRIC COMPANY l ChicagoS&C ELECTRIC CANADA LTD. l Toronto

of 23April 22, 1996

Figure 4. Selector handle operation.

Lpcking tabs

I Decoupled

S&C Switch Operators - Type AS-IAMANUAL OPERATION - Continued

I

Step 7To couple: Manually operate the switch operator to bringit to the same position (open or closed) as the Alduti-Rupter Switch. The switch operator position indicator,seen through the observation window, will show when theapproximate open or closed position has been attained.See Figure 5. (The position indicator for the Alduti-RupterSwitch, located on the output-shaft collar of the switch

operator, will be aligned later.) To move the switch opera-tor to the exact position for coupling, turn the manualoperating handle slowly until the position-indexing drumsare numerically aligned. Then swing the selector handleupright and rotate it counterclockwise to the coupledposition. Lower the handle to engage the locking tab. Theselector handle is now in the coupled position.

1 ADJUSTMENTS I

Remove the two-pole pull-out fuseholders for the motorcircuit and space-heater circuit. See Figure 2.

Failure to remove fuseholders can result in acci-dental energizing of the operator after the externalconnections have been completed.

Reinsert fuseholders only when directed to do so inthe steps that follow.

Make certain that the main contacts on all three switchpoles are fully closed and, where applicable, the switchtoggle mechanisms are in an overtoggle position againsttheir respective closed stops. Refer to the instructionsheet furnished with the Alduti-Rupter Switch.

With the selector handle in the coupled position, manu-ally crank the switch operator to the fully closed position,as indicated by the switch operator position indicator. SeeFigure 5.

At the switch operator output shaft, replace the detach-able portion of the coupling clamp. Make certain that thecutting tips of the piercing set screws do not protrude

i

through the body of the coupling. Torque the flexible cou-pling clamp bolts equally to fmal tightness so that theclamp pulls down evenly on the vertical-operating-pipesection. Then tighten the associated piercing set screws,piercing the pipe, and continue turning until a firm resis-tance is felt. See Figure 3.

Step 9With the selector handle in the coupled position, crankthe Alduti-Rupter Switch to the fully open position, thento the fully closed position, and in each position accu-rately align the switch position indicators on the output-shaft collar of the switch operator with the alignmentarrow below. See Figure 1. Each Alduti-Rupter Switchposition indicator can be shifted after loosening the hex-head screws which fasten it to the output-shaft collar.Tighten these screws after making the above alignments.

For Type AS-IA Switch Operators furnishedwith Source-Transfer Control Compatibility

instead, follow the step-by-step procedure out-

Position-indicating lamps(Catalog Number Suffix “-Ml’)

\

wInternal decouplingmechanism (in decoupled

‘tion)/m Operation

d-22,/ counter

Arrowplate

Position-indexing drums/position indicators

gure 5. Views of switch operator through observation windo\

\Selprtnr hnnrib

(in decoupledposition)

L

Internal decouplingmechanism(in coupled position)

769400 INSTRUCTION SHEET of 23April 22,1996


Step 10 The cranking direction to close the Alduti-Rupter Switch is indicated by an arrow plate located near the hub of the manual operating handle. See Figure 5. This direction is normally predetermined from the erection drawing for the specific installation and factory set accordingly. The direction of rotation of the switch operator motor is also normally set at the factory.

In the event that the cranking direction required to close the Alduti-Rupter Switch is opposite to that indicated by the arrow plate, remount the arrow plate, exposing its opposite side. (Direction of motor rotation will be checked in Step 12. j

Temporarily mark on the top of the switch operator enclosure the direction in which the output shaft rotates to close the Alduti-Rupter Switch.

Step 11 Place the selector handle in the decoupled position in preparation for electrical operation.

Step 12 With the manual operating handle in its storage position and the selector handle in the decoupled position, reinsert the motor-circuit fuseholder. Open the pushbutton protective cover* and operate the switch operator by means of the externally mounted “Open-Close’’ pushbuttons, if protided, or, in their absence, by momentarily jumpering terminals 1 and 8 to open, and 1 and 9 to c1ose.A Note the direction i n w h i c h the travel-limit cams rotate when the switch opwa,tor closes. This direction should agree with the temporary direction mark previously made on the top of the enclosure. (As a matter of information, the direction of rotation of the travel-limit cams is always the same as the direction of rotation of the output shaft. j

In the event that the direction of rotation of the travel- limit cams (as noted above) is opposite to the temporary direction mark previously made on the top of the enclosure, a reversal of the motor direction will be necessary. Remove the motor-circuit fuseholder to avoid accidental or remote energization of the control circuit. Inter- change the “Sl” and “S2” motor leads connected to terminals 4 and 5 on the terminal block in the switch operator enclosure. (On 12-volt dc switch operators, interchange the “Sl” and “S2” motor leads connected to the motor terminals.)

It should be noted particularly that reversal of the motor direction reverses only the direction of rotation of the output shaft and travel-limit cams. The identity of the opening-stroke and closing-stroke travel-limit cams (which will be adjusted later) will remain unaffected.

Step 13 The travel-limit switch (coupled to the motor), which governs the extent of output-shaft rotation in the opening and closing directions, includes two contacts that are operated by cam-actuated rollers. See Figure 6. The cams (upper one is the opening-stroke travel-limit cam; and the one immediately below is the closing-stroke travel-limit cam) are individually adjustable in 4.5-degree increments. Therefore, each cam can be adjusted to advance or retard engagement with its roller and thus open or close the corresponding switch contact, as desired, during motor operation. Advancing a cam advances roller engagement to de-energize the corresponding motor contactor earlier and thus decreases the extent of output-shaft rotation. Conversely, retarding a cam retards engagement with its roller to delay de-energization of the corresponding motor contactor and thus increases the extent of output-shaft rotation.

The travel-limit cams (as well as the auxiliary-switch cams) are to be adjusted as directed in Steps 14 through 19 using the following procedure (do not make any aaustments at this time): (a) Remove the motor”circuit fuseholder. (b) Raise (or lower) the cam toward its adjacent spring

until the cam is separated from the teeth of the inner gear.

(c) Rotate the cam to advance or retard engagement with its roller. See Figures 6 and 7. Advance the cam to decrease travel. Retard the cam to increase travel.

(d) Lower (or raise) the cam making sure that the teeth

Preliminary Adjustment of Travel-Limit Cams

Step 14 The adjustments described in this step are necessary only in the event that a reversal of the motor direction was required, as described in Step 12. If such motor reversal was not required, proceed to Step 15.

Closing-Stroke Travel-Limit Cam. Place the selector handle in the coupled position. Manually operate the switch operator in the closing direction and observe the closing-stroke travel-limit cam. At the completion of the switch operator closing stroke, the leading edge of the closing-stroke travel-limit cam should be engaged with its associated roller. If the leading edge is not engaged with its roller, adjust the closing-stroke travel-limit cam (as described in Step 13) so that its leading edge touches (or nearly touches) the roller.

are in mesh with the inner gear.

* For switch operators wlth optional remote-cont,rol blocking switch (sufflx “-Y”), opening the pushbutton protective cover prevents remote operatlon of the switch operator A Termmal designations may differ In special wiring dlagrams In such cases, refer to the specific wiring diagram for the correct terminal deslgnatlons.

INSTRUCTION SHEET 769.500 S&C ELECTRIC COMPANY Chicago of 23 S&C ELECTRIC CANADA LTD.. Toronto April 22, 1996

S&C Switch Operators - Type AS-1A1 ADJUSTMENTS -Continued

Switch oneratorposition indicator

CIxc;g-stroke Aj

Use when direction of output shaftrotation is clockwise to open.

Adjacent spring

il Opening-stroketravel-limit cam

Opening-strokeroller

d(In raised posrtion)

Opening-stroketravel-limit

/412 cam (with switch operator in

/ J

Inner gear, - :

fully closed position-raiseand turn cam counterclock-wise to increase travel of

I switch operator)

and travel-limit cam

Switch operatorposition indicator

Closing-strokeroller

Closing-stroketravel-limit cam

iib

Closing-stroke travel-

?limit cam (with switchoperator in fully openpcsition-lower and turncam clockwise to increasetravel of switch operator)

Use when direction of output shaft and travel-limit camrotation is counterclockwise to open.

Opening-stroketravel-limitcam (with switch operator infully closed position-raiseand turn cam clockwise toincrease travel of switchoperator)

Closing-stroke travel-limitcam (with switch operator infully open position-lowerand turn cam counterclock-wise to increase travel ofswitch operator)

Figure 6. Adjustment of travel-limrt cams.

769-500 INSTRUCTION SHEET of 23 S&C ELECTRIC COMPANY l ChicagoApril 22,1996 S&C ELECTRIC CANADA LTD. l Toronto

ADJUSTMENTS -Continued I

Opening-Stroke Travel-Limit Cam. With the selec-tor handle in the coupled position, manually operate theswitch operator in the opening direction and observe theopening-stroke travel-limit cam. At the completion of theswitch operator opening stroke, the leading edge of theopening-stroke travel-limit cam should be engaged withits roller. If the leading edge is not engaged with its roller,adjust the opening-stroke travel-limit cam (as described inStep 13) so that its leading edge touches (or nearlytouches) the roller. Return the manual operating handle toits storage position.

Intermediate Adjustment of Travel-Limit Cams

Step 15The adjustments described in this step are required toobtain a close approximation of the correct travel of theswitch operator in the decoupled position-i.e., in a no-load condition, in order to avoid inadvertently overdrivingthe Alduti-Rupter Switch when the switch operator is firstused for power opening or closing of the switch.

Closing-Stroke Travel-Limit Cam. With the selectorhandle in the coupled position, manually crank the Alduti-Rupter Switch to its fully closed position. Return themanual operating handle to its storage position. Thenplace the selector handle in the decoupled position andreplace the motor-circuit fuseholder.

Operate the switch operator electrically to open, andthen to close. If the position-indexing drums are notnumerically aligned, operate the switch operator electri-cally to open. Remove the motor-circuit fuse holder. Thenadjust the closing-stroke travel-limit cam, as described inStep 13, the necessary number of increments to attainnumerical alignment of the position-indexing drums at thecompletion of a switch operator closing stroke.

Opening-Stroke Travel-Limit Cam. With the selec-tor handle in the coupled position, manually crank theAlduti-Rupter Switch to its fully open position. Return themanual operating handle to its storage position. Thenplace the selector handle in the decoupled position andreplace the motor-circuit fuseholder.

Operate the switch operator electrically to close, andthen to open. If the position-indexing drums are notnumerically aligned, operate the switch operator electri-cally to close. Remove the motor-circuit fuseholder. Thenadjust the opening-stroke travel-limit cam, as described inStep 13, the necessary number of increments to attainnumerical alignment of the position-indexing drums at thecompletion of a switch operator opening stroke.

Figure 7. Adjustment of cams on auxiliary switch.

Ini gear

‘/Contact (closed)

Roller

- - - C a m ( l o w e r e d t o w a r dadjacent spring)

h Adjacent spring

INSTRUCTION SHEET 76gm5()()S&C ELECTRIC COMPANY l ChicagoS&C ELECTRIC CANADA LTD. l Toronto

of 23April 22, 1996

S&C Switch Operators - Type AS-IA

1 ADJUSTMENTS - Continued I Final Adjustment of Travel-Limit Cams

Step 16 The adjustments described in this step are necessary to ensure complete opening and closing of the Alduti-Rupter Switch. Therefore, attention must now be directed to the open and closed stops of the switch.

Operate the switch operator electrically to open and close the Alduti-Rupter Switch. Observe the toggle mechanisms (if applicable) and the open stops on the switch. It is likely that full opening and closing travel will not have been attained. This is because the travel-limit cams were adjusted to limit the extent of output-shaft rotation while the switch operator was in the decoupled position-Le., in a no-load condition. To attain full stop positions (and over-toggle positions, where applicable) of the Alduti- Rupter Switch, refer to Figure 6 and proceed as described below.

Closing-Stroke Travel-Limit Cam. If full closing of the Alduti-Rupter Switch was not attained, replace the motor-circuit fuseholder and operate the switch operator electrically to open the Alduti-Rupter Switch. Remove the motor-circuit fuseholder.

To increase travel in the closing direction, retard the closing-stroke travel-limit cam one 4.5-degree increment (1) in the clockwise direction if the travel-limit cam and output shaft rotate clockwise to open the Alduti-Rupter Switch; or ( 2 ) in the counterclockwise direction if the travel-limit cam and output shaft rotate counterclockwise to open the Alduti-Rupter Switch. Replace the motor-circuit fuseholder and operate the switch operator electrically to close. If full closing travel has not been attained, repeat the procedure described above until full closing travel is attained.

Opening-Stroke Travel-Limit Cam. If full opening of the Alduti-Rupter Switch was not attained, operate the switch operator electrically to close the switch. Remove the motor-circuit fuseholder.

To increase travel in the opening direction, retard the opening-stroke travel-limit cam one 4.5-degree increment (1) in the counterclockwise direction if the travel-limit cam and output shaft rotate clockwise to open the Alduti- Rupter Switch; or ( 2 ) in the clockwise direction if the travel-limit cam and output shaft rotate counterclockwise to open the Alduti-Rupter Switch. Replace the motor-circuit fuseholder and operate the switch operator electrically to open. If full opening travel has not been attained, repeat the procedure described above until full opening travel is attained.

Step 17 When travel-limit cam adjustments have been completed, it may be necessary to realign the Alduti-Rupter Switch position indicators on the switch operator output-shaft collar with the alignment mow.

With the switch operator in the fully open position and then in the fully closed position, check the corresponding switch operator position indicator. In each position, the corresponding position indicator should be readily visible from the front of the enclosure. If adjustment of either position indicator is necessary, remove the motor-circuit fuseholder, loosen the two set screws on the position indicator, and rotate the position indicator to the desired position. Retighten the set screws. See Figure 8.

Step 18 The auxiliary switch, which is permanently coupled to the motor, includes eight contacts (terminals 11 through 26). If the optional position-indicating lamps are included, six contacts are available (terminals 13 through 18 and 21 through 26). These contacts are provided so that external circuits can be established to monitor switching opera- tions. Each contact is operated by a cam-actuated roller. The cams are individually adjustable in 4.5-degree increments. Adjustment of the cams is accomplished in a manner identical to that indicated in Step 13 for the travel- limit cams.


I ADJUSTMENTS -Continued

The “standard” configuration for the auxiliary switch consists of four “al” contacts (terminals 11 through 18) and four “bl” contacts (terminals 19 through 26). Thus, with the switch operator in the open position, the “al” contacts are open and the “bl” contacts are closed. Con- versely, with the switch operator in the closed position, the “al” contacts are closed and the “bl” contacts are open. A contact is closed if its roller is disengaged from a cam and, conversely, a contact is open if its roller is engaged by a cam. See Figure 8.

Any auxiliary-switch contact being used must be checked for proper operation after the switch operator travel-limit cams have been adjusted. Check the auxiliary- switch contacts for both the open and closed positions of the Alduti-Rupter Switch. If necessary, adjust the cams as described in Step 13 so that the auxiliary-switch contacts are in the desired open or closed position (Le., cam engaged with roller, or cam disengaged from roller). See Figure 7.

Since each cam can be individually adjusted in 4.5- degree increments, any “al” contact can be changed to a “bl” contact, or vice versa. Also, because of the many positions to which the cams can be adjusted, the various rollers can be engaged or disengaged to respectively open or close their contacts simultaneously,’sequentially, ran- domly, or in various combinations. Adjustment of the auxiliary-switch contacts for other than the “standard” configuration is left to the user. Remember that the motor- circuit fuseholder should be removed when adjusting these contacts. (Switch operators having catalog numbers with the suffix “-Q” are equipped with an extra auxiliary switch, terminals 27 through 34, having four contacts-two “al” and two “b1”-which may be adjusted as described in Step 13(a) through (d). See Figure 8.)

Step 19 Switch operators having catalog numbers with either the suffix “-W or “-Z” are equipped with an extra auxiliary switch which is permanently coupled to the Alduti-Rupter

Switch. The suffix “-W auxiliary switch consists of eight contacts (terminals 35 through 50). The suffix “-Z” auxiliary switch consists of twelve contacts (terminals 35 through 50 plus terminals 80 through 87). These contacts are provided so that external circuits can be established to monitor Alduti-Rupter Switch operation. Each contact is operated by a cam-actuated roller and the cams are individually adjustable in 4.5-degree increments.

The “standard” configuration for the suffix “-W” extra auxiliary switch consists of four “a2” contacts (terminals 35 through 42) and four “b2” contacts (terminals 43 through 50). The “standard” configuration for the suffix “-Z” extra auxiliary switch consists of six “a2” contacts (terminals 35 through 42 and terminals 80 through 83) and six “b2” contacts (terminals 43 through 50 and terminals 84 through 87). Thus, with the Alduti-Rupter Switch in the fully closed position, the “a” contacts should be closed and the “b2” contacts should be open. Conversely, with the Alduti-Rupter Switch in the fully open position, the “a2” contacts should be open and the “b2” contacts should be closed. See Figure 8.

Any suffix “-W or “-Z” auxiliary-switch contact being used must be checked for proper operation after satisfac- tory electrical operation of the Alduti-Rupter Switch has been achieved. Check the auxiliaryswitch contact engagement for both the open and closed positions of the Alduti-Rupter Switch. Adjustment of the suffix “-W or “-Z” extra auxiliary switch is identical to the adjustment performed for the travel-limit switch, the auxiliary switch, and the suffix “-Q” extra auxiliary switch. Therefore, if adjustment of the suffix “-W or “-Z” auxiliary switch is needed, refer to Step 13 and Figures 7 and 8.

Step 20 Reinsert the fuseholders for the motor circuit and space- heater circuit.


S&C Switch Operators - Type AMAADJUSTMENTS - Continued

Extra auxiliary switch(Catalog NumberSuffix “-vv” or ‘I-Z?)

Travel-limit switch,auxiliary switch,and extra auxiliaryswitch (CatalogNumber Suffix “-a”)

‘gure 8. “Standard” contact configurations.

769-500 INSTRUCTION SHEET of 23April 22, 1996

S&C ELECTRIC COMPANY l Chicago VS&C ELECTRIC CANADA LTD. l Toronto • i

ADJUSTMENTS - ContinuedI

Set screw(2 per indicator)

:n

Travel-limit switch

“al ” contactsclosed

“bl” contactsopen

“al ” contactsclosed

“bl” contactsopen

Auxiliary) switch,

8-PST

-( Extraauxiliaryswitch,

- 4-PST(CatalogNumber

’ Suffix “-a”)

Travel-limit switch

“al ” contactsopen

“bl ” contactsclosed

“al ” contactsopen

“bl” contactsclosed

Auxiliaryswitch,&PST

Extraauxiliaryswitch,4-PST(CatalogNumberSuffix “-Q”)

Switch operator in fully closed position Swftch operator in fully open position

“a2”contactsclosed

“b2”contactsopen

Extraauxiliaryswitch,8-PST(CatalogNumberSuffix “-W)

“a2” contactsclosed

“b2” contactsopen

“a2”contactsopen

“b2”contactsclosed

Extraauxiliaryswitch,8-PST(CatalogNumberSuffix “-W)

“a2” contactsopen

“b2” contactsclosed

Extraauxiliaryswitch,12-PST(CatalogNumberSuffix ‘l-z’)

Alduti-Rupter Switch in fully closed position Alduti-Rupter Switch in fully open position


INSTRUCTION SHEET 769400 of 23April 22, 1996

S&C Switch Operators - Type A S I A INSPECTION SCHEDULE AND PROCEDURES I

1.

2.

3. 4.

5 .

To assure continued proper performance of the Type (e) Using a 3/32" Allen wrench, loosen the pad assem- AS-1A Switch Operator, it should be inspected every bly socket-head set screw on the side of the cali- 5 years. De-energize the associated Alduti-Rupter per assembly approximately one-half turn. See Switch and perform the following switch operator Detail A. inspection procedures: (f) Then, using a 5/6" Allen wrench, rotate the pad

Check for evidence of water ingress, damage, and excessive corrosion or wear. Check ease of operation during slow, manual cranking using the switch operator manual operating handle. Check electrical operation, coupled and decoupled. Check for loose wiring inside enclosure and proper functioning of position-indicating lamps, operation counter, convenience lamp, etc. Check operation of brake and readjust if necessary. The procedure for doing this is as follows. See Fig- ure 9. (a) Place the selector handle in the decoupled

position. (b) Remove the two-pole pull-out fuseholders for the

motor circuit and space-heater circuit. (c) Disconnect the linkage rod by removing the

W-20 x 1%" hex-head screw, lockwasher, flat washer, and spacer-bushing from the end of the brake lever, as shown in Detail A. Be careful not to lose these parts. Then raise the brake lever and measure the vertical free play, as shown in Detail B. This dimension should be %" to 3/4'! Should the measurement be outside this range, brake-wear compensation is required; proceed to Step (d). If the measurement is within this range, reattach the linkage rod and tighten the '/4"-20 X11/4" hex-head screw securely; proceed to Step (i).

(d) Remove the four %6"-18 Xl?h'' screws used to attach the motor, withdraw the motor, and carefully rest its shaft on the floor of the enclosure. Be careful not to lose the square key or tubular spacer (if furnished), which may remain on the motor shaft. Note: 115-volt ac and 230-volt ac motors utilize a ?4"-20 socket-head set screw on the side of the brake disc hub, as shown in Detail C. Loosen this set screw approximately one-half turn, using a W Allen wrench, before removing the motor.

assembly clockwise until the free play at the end of the brake lever is vi'' to 3/4", as shown in Detail B. Now tighten the 3/32" pad assembly socket-head set screw.

(g) Insert the spacer-bushing through the angle bracket and brake lever, and reattach the linkage rod using the 1/4"-20 X1%" hex-head screw, lockwasher, and flat washer. Tighten the screw securely.

(h) Insert the square key in the keyway, as shown in Detail A. Slip the tubular spacer (if furnished) over the motor shaft and reinstall the motor. Position the motor such that the two weep holes on the side of the housing face downward. Replace the four 5/8-18 x11/4" screws used to attach the motor and tighten them securely. On 115-volt ac and 230-volt ac motors, further, retighten the l/4"-20 socket- head set screw on the side of the brake disc hub.

(i) Check the operation of the brake linkage as follows: Pull the latch knob on the hub of the manual operating handle and slowly pivot the handle forward from its storage position toward its cranking position until the brake disc can be rotated by hand. Be ccweful not to get grease o n the brake disc. Now measure the distance that the end of the brake lever travels from the point of initial brake release to the bottom of its stroke (which occurs when the handle locks into the cranking position). This dimension should be '/8"

to Y4". See Detail D. Should the measurement be outside this range, refer to the nearest S&C Sales Office.

Since the Type AS-1A Switch Operator may be conve- niently decoupled from the Alduti-Rupter Switch, elective exercising of the operator may be performed at any time without requiring an outage or switching to an alternate source.

769-500 INSTRUCTION SHEET of 23 S&C ELECTRIC COMPANY Chicago April 22, 1996 S&C ELECTRIC CANADA LTD. Toronto

I INSPECTION SCHEDULE AND PROCEDURES - Continued I

DETAIL C Location of motor shaft set screw

(115- & 230-vac operator only)

DETAIL A Brake assembly

Operating linkage dlsconnected from brake lever

%”-%” vertical free play

DETAIL B Measuring brake

lever free play Brake lever

Operating linkage connected to brake lever

DETAIL D Measuring brake \ Brake lever at bottom of its stroke (manual operating

lever stroke handle in cranking position)

Figure 9. Brake inspection procedure.

INSTRUCTION SHEET 769-500 S&C ELECTRIC COMPANY Chicago of 23 S&C ELECTRIC CANADA LTD. Toronto April 22, 1996

S&C Switch Operators - Type AS-1 A I CHECKING SWITCH OPERATOR AND ALDUTI-RUPTER SWITCH POSITIONS 1 Do not assume that the switch operator position neces- sarily indicates the open or closed position of the Alduti- Rupter Switch. Upon completion of an opening or closing operation (electrical or manual), check to be sure that the following conditions exist:

The switch operator position indicator, Figure 5, sig- nals “OPEN” or “CLOSED” to indicate that the switch operator has moved through a complete operation. Also note the position-indicating lamps, Figure 5, if furnished. The Alduti-Rupter Switch position indicator, located on the switch operator output shaft. F’igure 1, is in agree- ment with the switch operator position indicator. That is, both indicators should simultaneously show “OPEN” or “CLOSED.” The blades on all three poles of the Alduti-Rupter Switch are fully open or fully closed (by visual verification).

Then tag and padlock the switch operator in accordance with standard system operating procedures. In all cases, make certain that the switch operator is padlocked before “walking away.’’

To restore to normal operation So that the switch operator is ready for normal power operation of the Alduti-Rupter Switch by remote automatic or supen+sory control, be sure that the following conditions exist:

The selector handle is in the coupled position. The manual operating handle is in its storage position. The two-pole pull-out fuseholders for the motor circuit

The pushbutton protective cover is closed. The switch operator is tagged and padlocked in accor-

and space-heater circuit are inserted.

dance with standard system operating procedures.

I APPENDIX I

For w p e AS-1A Switch Operators furnished with Source-Transfer Control Compatibility (suffix “-Ul”), follow the step-by-step procedure outlined below after having completed Step 9.

Step A The cranking direction to close the Alduti-Rupter Switch is indicated by an arrow plate located near the hub of the manual operating handle. See Figure 6. This direction has been predetermined from the erection drawing for the specific installation and has been factoly-set accordingly. The direction of rotation of the switch operator motor has also been set at the factory.

Verify that these directions of rotation are correct as follows: (a) With the selector handle in the coupled position, man-

ually crank the Alduti-Rupter Swit,ch to the fully open position and then to the fully closed position. Tempo- rarily mark on the top of the switch operator enclosure the direction in which the output shaft rotates to close the Alduti-Rupter Switch.

(b) If the cranking direction required to close the Alduti- Rupter Switch is opposite to that indicated by the arrow plate, remove the arrow-plate mounting screws and remount the arrow plate, exposing the opposite side.

(e) With the manual operating handle in its storage position and the sebector handle In Ihe decmupled position, reinsert the motor-circuit fuseholder. Open the pushbutton protective cover and operate the switch operator by means of the externally mounted operdclose pushbuttons, if probided, or in their absence, by momentarily jumpering terminals 1 and 8 to open, and 1 and 9 to c1ose.A Note the direction in which the travel-limit discs mtate whew th,e switch operator closes. The direction should agree with the temporary direction mark previously made on the top of the enclosure and with the direction displayed in the cutaway section on the outer ring of the travel-limit discs. See Figure 10. (As a matter of information, the direction of rotation of the travel-limit discs is always the same as the direction of rotation of the output shaft.)

(d) In the event that the direction of rotation of the travel- limit discs noted in (c) above is opposite to the temporary direction mark prekiously made in (a) above, a reversal of the motor direction will be necessary. Remove the ,motor-circu,it juseholder to avoid accidental or remote energization of the control circuit. Interchange the “Sl” and ‘32” mot,or leads connected to terminals 4 and 5 on the terminal block in the switch operator enclosure.

A Termlnal deslgnatlons may dlffer In special wring dlagrams. In such cases, refer to the speclfic wiring dlagram for the correct, termnal designatlons


APPENDIX - Continued

It should be noted particularly that reversal of themotor direction reverses only the direction of rota-tion of the output shaft and travel-limit discs. Theidentity of the opening-stroke and closing-stroketravel-limit discs (which will be adjusted later) willremain unaffected.

(e) In the event that the direction of rotation of the travel-limit discs noted in (c) above is opposite to the direc-tion displayed in the cutaway section on the outer ringof the closing-stroke travel-limit disc, remove the posi-tioning screws on the outer ring of the closing-stroke

travel-limit disc. See Figure 10. Rotate the outer ringuntil the desired direction is displayed in the cutawaysection. Replace the positioning screws.

(f) Reinsert the motor-circuit fuseholder and operate theswitch operator to the open position.

(g) If the direction of output-shaft rotation to open theAlduti-Rupter Switch is opposite to that displayed inthe cutaway section on the outer ring of the opening-stroke travel-limit disc, change the direction displayedas indicated in (e) above.

-Positioning screws

A Opening-stroke travel-limit

Switch operator

disc (in raised position)

<’IA Cutaway section

(on outer ring)

\ Arrow (on cutawaysection)

r

Indicator plate (with numbers)

Aatustment or openmg-stroke navel-umn aisc.

position indicator

Indicator plate (with numbers)

Figure 10. Adjustment of travel-limit discs.

osing-stroke travel-limitSC (in lowered position)

Arrow (on cutwayCutway section (on outer ring) section)

Adjustment of closing-stroke travel-limit disc.

INSTRUCTION SHEET 769.500

•fiS&C ELECTRIC COMPANY l Chicago of 23

S&C ELECTRIC CANADA LTD.. Toronto April 22, 1996

S&C Switch Operators - Type A S I A

1 APPENDIX - Continued I Step B

The travel-limit switch (coupled to the motor), which governs the extent of output-shaft rotation in the opening and closing directions, includes six contacts that are operated by cam-actuated rollers. Positioning of the cams to prop- erly engage the rollers is facilitated by the travel-limit discs (upper one is the opening-stroke travel-limit disc; lower one is the closing-stroke travel-limit disc).

Adjustment of the opening-stroke travel-limit disc (and therefore the associated cams) is accomplished as follows: (a) Remove Ike moto~-ci?-cuit.fuseholder. (b) Place the selector handle in the coupled position and

manually crank the Alduti-Rupter Switch to the fully open position.

(e) Grasp the handwheel and turn it to the extent possible in a direction opposite to the direction the output shaft rotates to open the Alduti-Rupter Switch. See Figure 10.

(d) With the handwheel held in the position indicated above, raise the opening-stroke travel-limit disc approximately 3/16 of an inch and rotate the disc until the arrow on its outer ring is in line with the number 5 on the indicator plate. Lower the disc, make sure it is engaged, and release the handwheel.

Step C Adjustment of the closing-stroke travel-limit disc (and therefore the associated cams) is acconlplished as follows: (a) Manually crank the Alduti-Rupter Switch to the fully

closed position. (b) Grasp the handwheel and t,urn it to the extent possi-

ble in a direction oppo.sitr to the direction the output shaft rotates to close the Alduti-Rupter Switch. See Figure 10.

(e) With the handwheel held in the position indicated above, lower the closing-stroke travel-limit disc approximately %s of an inch and rotate the disc until the arrow on the outer ring is in line with the number 5 on the indicator plate. Raise the disc, make sure it is engaged, and release the handwheel.

Step D To preclude the possibility of inadvertently overdriving the Alduti-Rupter Switch when the switch operator is first used for power opening of the switch: (a) With the selector handle in the coupled position, man-

ually crank the Alduti-Rupter Switch to the fully open position.

(b) Place the selector handle in the decozipled position. (e) Return the manual operating handle to its storage

(d) Reinsert the motor-circuit fuseholder. (e) Operate the switch operator electrically to close and

then to open. If the position-indexing drums are not numerically aligned, operate the switch operator electrically to close. Then adjust the opening-stroke travel-limit disc, as described in Step B, to attain numerical alignment of the position-indexing drums at the completion of a switch operator opening stroke.

position.

(f) Remove the motor-circuit fuseholder.

Step E To preclude the possibility of inadvertently overdriving the Alduti-Rupter Switch when the switch operator is first used for power closing of the switch: (a) With the selector handle in the coupled position,

manually crank the Alduti-Rupter Switch to the fully closed position.

(b) Place the selector handle in tke decoupled position. (c) Return the manual operating handle to its storage

(d) Reinsert the motor-circuit fuseholder. (e) Operate the switch operator electrically to open and

then to close. If the position-indexing drums are not numerically aligned, operate the switch operator electrically to open. Remove the motor-circuit fuseholder. Then adjust the closing-stroke travel-limit disc, as described in Step C, to attain numerical alignment of the position-indexing drums at the completion of a switch operator closing stroke.

position.


I APPENDIX - Continued

Step F Place the selector handle in the coupled position. Operate the switch operator electrically to open and to close the Alduti-Rupter Switch. Observe the toggle mechanisms (if applicable) and the open stops on the switch. It is likely that full opening and closing travel will not have been attained because the travel-limit discs were adjusted to limit the extent of output-shaft rotation while the switch operator was in the decoupled position-i.e., a no-load condition. To attain full stop positions (and overtoggle positions, where applicable), perform the following: (a) If full opening of the Alduti-Rupter Switch was not

attained, replace the motor-circuit fuseholder and operate the switch operator electrically to close the Alduti-Rupter Switch. Remove the motor-circuit fuseholder. To increase travel in the opening direction, retard the opening-stroke travel-limit disc one indicator-plate number. Keep in, m i n d that the di,rection of rl%sc rotation is a lu~ays th,e same as that of the output shqft. Repeat this procedure until full opening travel is att,ained.

(b) If full closing of the Alduti-Rupter Switch was not attained, replace the motor-circuit fuseholder and operate the switch operator electrically to open the Alduti-Rupter Switch. Remove the motor-circuit fuse-

holder. To increase travel in the closing direction, retard the closing-stroke travel-limit disc one indicator-plate number. Keep in mind tha,t the cli,rection of disc rotation is always the same as tha,t of the output shaft. Repeat this procedure until full closing travel is attained.

Step G When travel-limit disc aaustments have been completed, it may be necessary to realign the Aldut,i-Rupter Switch position indicators on the switch operator output-shaft collar with the alignment arrow.

With the switch operator in the fully open position and then the fully closed position, check the corresponding switch operator position indicator. In each position, the corresponding position indicator should be readily visible from the front of the enclosure. If adjustment of either position indicator is necessary, remove the motor-circuit fuseholder, loosen the two set screws on the position indicator, and rotate the position indicator to the desired position. Retighten the set screws. See Figure 8.

Proceed to Step 18 in the “ADJUSTMENTS” section.


instruction sheet 769-500 - s & c electric · ljnderst,anding safety-alert messages. ..... 4...

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