S&C Switch Operators - Types LS-I and LS-2

INSTRUCTIONS For Installation

I TABLE OF CONTENTS i Section Page Number Section Page Number INTRODUCTION ........................................ 1 INSPECTION SCHEDULE AND PROCEDURES ............. .16 INSTALLATION ......................................... 3 CHECKING SWITCH OPERATOR AND HIGH-VOLTAGE MANUALOPERATION ................................... 6 SWITCH POSITIONS.. ................................ .18 ADJUSTMENTS ......................................... 8

I INTRODUCTION I

The equipment covered by this publication must be selected for a specific application and it must be installed, operated, and maintained by qualified persons who are thoroughly trained and who understand any hazards that may be involved. This publication is written only for such qualified persons and is not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment.

The S&C Switch Operator-Type LS-1 is a low-speed operator (with an operating time of 4 to 7 seconds) expressly recommended for power operation of outdoor high-voltage disconnects and interrupter switches not of S&C manufacture, for which this low operating speed is appropriate.

The S&C Switch 0perator”Type LS-2 is a high-speed operator (with a maximum operating time of 2.2 seconds) especially designed for power operation of S&C Line-Rupters”.

For power operation of S&C Alduti-Ruptere Switches-Outdoor Distribution, S&C Switch Opera- tors-Types M - l A and As-10 are offered. For power operation of S&C Circuit-Switchers, S&C Switch Operators-Types CS-lA, CS-2A, and CS-10 are available.

S&C Switch Operators-Types LS-1 and LS-2 include the following features as standard:

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 “visible air-gap” verification of complete disengage- ment of output shaft.

0 Open-close pushbuttons, externally operable, with padlockable cover.

SWITCH OPERATORS-Types LS-1 and LS-2 Application

Voltage, Seconds@ Voltage Type High-Voitage Device

Torque at Operating

Minimum

inch-Lbr.

Switch Locked-Rotor Maximum Ma;?

Schematic Wiring

High-Voltage Number

Diagram Drawing

Number ::r:; RaledControl lime, Control Operator Rating of

Device

Outdoor Disconnects and 7,2 kv thru 38857R1-0 10 21 500 125 v dc 345 kv Not of S8C Manufacture

38857R1-A 27 18 000 48 v dc interrupter Swltches LS-1 4 to 7* CDR-3133

- S8C Line-Rupters 115 kvthru 3891 5-A 30 18 000 48 v dc

Ls-2 230 kv 15 21 500 125 v dc 2.2 CDR-3238

38915-8 - @ Based on minunum battery and external control w e sue requirements Depending on torque requirements of the dlsconnect or interrupter

than-mlnimum battery sue and/or external control wire size is utilized specified In S&C Data Bulletin 753-60 operating time will be less if larger- switch, and assuming 180-degree vertical-pipe rotation.

Supersedes lnstructlon Sheet 753-500 dated 12-11-89 ‘1993

INSTRUCTION SHEET 753- 500 S&C ELECTRIC COMPANY Chicago Page 1 of 18 S&C ELECTRIC CANADA LTD. Toronto September 7,1993

S&C Switch Operators - Types LS-I and LS-2 I INTRODUCTION - Continued I

0 Built-in nonremovable, foldaway manual operating

0 Mechanical position indicators for both switch operator and high-voltage switch "open" and "closed" positions.

handle.

0 Non-reset electric operation counter. 0 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).

0 Foolproof recoupling. Impossible with position- indexing drums to couple the switch operator and the high-voltage switch "unsynchronized."

0 Fingertip precision adjustment of limits of output- shaft rotation (adjustable over a 35- to 235-degree range) using self-locking spring-biased cams.

0 Eight-pole auxiliary switch, coupled to motor, with fmgertip precision adjustment of individual contacts using self-locking spring-biased cams. Antifriction bearings throughout; tapered roller bearings for all high-torque gear-train shafts.

0 Two-pole pull-out fuseholders for motor circuit and space-heater circuit. Weatherproof, dustproof enclosure, equipped with 120/240-volt ac space heater, factory-connected for 240-volt ac operation. Can readily be field recon- nected for 120-volt ac operation.

0 Tamper-resistant design-welded enclosure; baffled louvers; gasketed, flanged door openings; cam-action door latch; provisions for padlocking. Foul-weather accessibility to interior of enclosure. Access is by door rather than by removal of entire enclosure.

0 Flexible coupling, to connect switch operator output shaft to vertical operating pipe of disconnect or interrupter switch (I%", 2", 2M", or 3" IPS, as specified).

Switch operator catalog numbers are suffied with one or more letters. The first letter following the catalog number designates the motor and control voltage:

suffi i

-A -B

Voltage

48 volts dc 125 volts dc

Other suffm letters which may be added to the switch operator catalog number indicate the inclusion of optional accessories as follows:

ACCESSORIES Suffix Added to

Item Catalog Number Switch Operator

Deletion of Externally Operable Open-Close Pushbuttons -J

I Space Heater Thermostat I -K I Key Interlock wlth Swltch, locks high-voltage swltch open and disconnects motor-control ctrcult

-Q Extra Auxihary Switch (mdlvldually adjustable contacts), 4-PST (coupled to motor)

" Posltton-lndlcating Lamps (one red, one green), mounted inside the enclosure

-L ~ ~~

Duplex Receptacle and Convenlence-Light Lampholder with Swltch

Remote-Control Blocking Switch, prevents remote operatlon of switch operator when the protective cover for the

-W Extra Auxlllary Swltch (indlvldually adjustable contacts), 8-PST (coupled to high-voltage switch)@

-V

externally mounted open-close pushbuttons is open -Y

1 Extra Auxlhary Swltch (Individually adjustable contacts), 12-PST (coupled to high-voltage switch)@ I -Z I @ The 8-PST extra auxAary switch (suffix "-W) cannot be furnlshed if the 12-PST versmn (suffur "-Zm) is specified. and m e versa

753400 INSTRUCTION SHEET Page 2 of 18 S&C ELECTRIC COMPANY Chicago September 7,1993 S&C ELECTRIC CANADA LTD. 0 Toronto

1 INSTALLATION I

step 1Bolt the switch operator in position with %-inchmounting hardware, using any two of the four holesin each of the mounting angles at the rear of the switchoperator.

Step 2Attach, to the switch operator output shaft, the flexiblecoupling furnished for the vertical operating pipe. SeeFigure 1. Thread the attachment bolts through theflexible coupling plate and through the coupling flangeon the output shaft. Tighten the bolts to draw theflexible plate flush against the flangt; this will deform

the threads in the flexible plate, resulting in a binding,nonslip connection. Install and tighten the self-lockingnuts. & not use lockwashers with thejlexible couplingattachment bolts.

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

s t e p 3Place the high-voltage switch pole-units in their fullyclosed positions. Install the interphase and vertical-operating-pipe sections. However, at the switchoperator, do not attach the vertical pipe section to theswitch operator output shaft until so directed in Step 9.

Attachment bolt Vertical operating

Flexible couplingplate

lamp bolts

Switchoutput

Flexible coupling

Self-locking nut

cover

Door handle-

High-voltage-switchposition indicators

Alignment arrow

Manual operatinghandle (in storageposition)

I Selector handle

L Switch operatornameplate

Figure 1. Exterior view of switch operator.

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Page3of 18September 7,1993

S&C Switch Operators - Types M-1 and LS-2

Step 4Mark the conduit-entrance location for the control-circuit wiring on the conduit-entrance plate in thebottom of the switch 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 5

To avoid accidental energizing of the operator afterthe external connections have been completed,remove the two-pole pull-out fuseholders for themotor circuit and space-heater circuit. See Figure 2.Reinsert the fuseholders only when indicated in thesteps which follow.

Remove the blocking from the motor contactors.

Pushbutton protectivecover (open)

\Operation counter

I

Remote-control blockingswitch (Catalog NumberSuffix “-Y”) Position-indexing

“Open-close”pushbuttons -

Travel-limit switch,2-PST (not visible

Arrow plate

Extra auxiliary switch, /8-PST (Catalog Number

.

Suffix “-W”); 1%PSTversion (CatalogNumber Suffix “-Z”)is similar

Motor contactor,opening

Motor contactor,closing

Conduit-entranceplate

I Auxiliary switch,

8-PST

Extra auxiliary switch,4-PST (Catalog NumberSuffix “42”)

E. M o t o r - c i r c u i t t w o - p o l e

-pull-out fuseholder

I

(control-source fusesand two-pole control-source disconnect

Manual operatinghandle interlockswitch andmechanicalblocking rods

switch on earlier models)

Figure 2. interior views of switch operator.

753-500 INSTRUCTION SHEETPage 4 of 18September 7,1993

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1 INSTALLATION - Continued

C&nect the external control-circuit wiring (includ-ing ‘space-heater source leads) to the terminal blocksof the switch operator in accordance with the wiringdiagram furnished.

Unauthorized changes should not be made in thewiring of this switch operator. Should a control-circuit revision appear desirable, it should be madeonly on the authority of a revised wiring diagramwhich has been approved by both the user and S&CElectric Company.

ments for the control-circuit wiring, as shown inS&C Data Bulletin 753-60 and on the switchoperator schematic wiring diagram furnished.

Pushbutton protectivecover (closed)

Duplex receptacle and\convenience-iiqht iamp-

holder with swi&h(Catalog NumberSuffix “4”)

instruction manualand holder I

-Q

Space-heater circuit Atwo-pole pull-outfuseholder (space heaterfuses on earlier models)

Filter holder Space heater Door gasket

Position-indicatinglamps (Catalog NumberSuffix “-M”)

B r a k e - r e l e a s esolenoid

\Terminal block

INSTRUCTION SHEET 7531500q S&C ELECTRIC COMPANY l ChicagoS&C ELECTRIC CANADA LTD. l Toronto

Page 5 of 18September 7,1883

S&C Switch Operators - Types M-1 and LS-2MANUAL OPERATION

I

Before proceeding further, the user should becomefamiliar with the operation of the manual operatinghandle and the selector handle, as described on theswitch operator nameplate on the right-hand side ofthe enclosure and in the following Steps 6, 7, and 8.See Figures 3 and 4.

Manual operation of the switch operator to openor close an energized disconnect switch or inter-rupter switch is not recommended. The reducedoperating speed, due to hand cranking, will shortenthe life of, and may damage, the arcing horns (orinterrupting units). If switch operater controlvoltage is not available and high-voltage circuitconditions permit emergency manual opening,crank the manual operating handle rapidly andcontinuously through its full travel. Manual closingof an energized disconnect switch or interrupterswitch should be avoided because of the possibilityof closing into a fault.

Step 6To 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 both the “opening”and “closing” motor contactors are mechanicallyblocked in the open position.)

If desired, during manual operation, the switchoperator may also be disconnected from the controlsource by removing the motor-circuit two-pole pull-outfuseholder, located on the right-hand inside wall of theenclosure.

To return the manual operating handle to its storageposition, pull the latch knob and pivot the handleapproximately 90 degrees. The handle will then bedisengaged from the switch operator and may berotated freely in either direction to its storage position.

Piercing set screwsVertical operating

Flexible coupling

Manual operatinghandle

Selector handle

Latch knob

Switch operatornameplate

Figure 3. Manual operation.

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MANUAL OPERATION - Continued I

Complete the handle storage by pivoting the operatinghandle backward approximately 90 degrees until itlatches in the storage position.

Note that the manual operating handle may bedisengaged from the switch operator mechanism at anyposition of the handle.

The handle may be padlocked in its storage position.

Step 7To decouple: The integral external selector handle, foroperation of the built-in internal decoupling mecha-nism, is located on the right-hand side of the switchoperator enclosure. See Figure 3. Swing the selectorhandle upright and slowly rotate it clockwise50 degrees to the decoupled position. See Figure 4. Thisdecouples the switch operator mechanism from theswitch operator output shaft. Then lower the selectorhandle to engage the locking tab. When thus decoupled,the switch operator may be operated either manuallyor electrically without operating the high-voltageswitch. When the selector handle is in the decoupledposition, the output shaft is prevented from movingby a mechanical locking device located within the switchoperator enclosure. During the intermediate segmentof the selector handle travel, &rich includes the positionat which actual disengagement (or engagement) of theinternal decoupling mechanism occurs, the motor-circuit source leads are momentarily disconnected andboth the “opening” and “closing” motor contactors aremechanically blocked in the open position. Visualinspection, through the observation window, will verifywhether the internal decoupling mechanism is in thecoupled or decoupled position. See Figure 5. Theselector handle may be padlocked in either position.

step 8To couple: Manually operate the switch operator tobring it to the same position (open or closed) as thehigh-voltage switch. The switch operator positionindicator, seen through the observation window, willshow when the approximate open or closed positionhas been attained. See Figure 5. (The position indicator

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for the high-voltage switch, located on the output-shaftcollar of the switch operator, will be aligned later.) Tomove the switch operator to the exact position forcoupling, turn the manual operating handle slowly untilthe position-indexing drums are, numerically aligned.Then swing the selected, handle upright and rotate itcounterclockwise to the coupled position. Lower thehandle to engage the locking tab. The selector handleis now in the coupled position.

Selector handle(being turned todecoupled position)

tabs

ed

Figure 4. Seleclor handle operation.

INSTRUCTION SHEET 7531500Page 7 of 16

September 7,1993

S&C Switch Operators - Types B-1 and LS-2ADJUSTMENTS I

Step 9

To avoid accidental energizing of the operator,remove the two-pole pull-out fuseholders for the

1 reinsertthem until so directed. 1motor circuit and space-heater circuit and do not

Make certain that the main contacts on all high-voltage switch pole-units are fully closed.

With the selector handle in the coupled position,manually crank the switch operator to the fully closedposition as indicated by the switch operator positionindicator. See Figure 5.

At the switch operator output shaft, replace thedetachable portion of the coupling clamp. Make certainthat the cutting tips of the piercing set screws do notprotrude through the body of the coupling. Torque theflexible coupling clamp bolts equally to final tightness,so that the clamp pulls down evenly on the verticaloperating-pipe section. Then tighten the associatedpiercing set screws, piercing the pipe, and continueturning until a firm resistance is felt. See Figure 3.

to the fully closed position, and in each positionaccurately align the high-voltage-switch positionindicators on the output-shaft collar of the switchoperator with the alignment arrow below. See Figure 1.Each high-voltage-switch position indicator can beshifted after loosening the hex-head screws whichfasten it to the output-shaft collar. Tighten these screwsafter making the above alignments.

step 11The cranking direction to close the high-voltage switchis indicated by an arrow plate located near the hubof the manual operating handle. See Figure 5.

In the event that the cranking direction required toclose the high-voltage switch is opposite to thatindicated by the arrow plate, remount the arrow plateexposing its opposite side. (Direction of motor rotationwill be checked in Step 13.)

Temporarily mark on the top of the switch operatorenclosure the direction in which the output shaftrotates to close the high-voltage switch.

step 12Place the selector handle in the decoupled position in

Step 10With the selector handle in the coupled position, crankthe high-voltage switch to the fully open position, then

preparation for electrical operation. - -

Position-indicating lamps(Catalog Number Suffix “-M”)

I Position-indexingr drums

T-T--Operation counter

:mJ ’ Selector(in deco

Internal decoupling mechanism(in coupled position)

I

handleJpled position)

Internal decoupling mechalism Switch operator(in decoupled position) position indicators

Figure 5. Views of switch operator through observation window.

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JADJUSTMENTS I Step 13

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 provided, 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 cams rotate when the switch operator 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.)

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. Interchange the “Sl” and “S2“ motor leads connected to terminals 4 and 5 on the terminal block in the switch operator enclosure.

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 14 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. Con- versely, 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 15 through 20 using the following procedure (do not make any adjustments 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 are in mesh with the inner gear.

Preliminary Adjustment of Travel-Limit Cams

Step 15 The adjustments described in this step are necessary only if: (a) The switch operator output-shaft rotation (adjust-

able over a 35- to 235-degree range) was not factory set for the specific requirement of this installation; and/or

(b) A reversal of the motor direction was required, as described in Step 13.

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 14) so that its leading edge touches (or nearly touches) the roller.

Opening-Stroke Travel-Limit Cam. With the selector handle in the coupled position, manually operate the switch operator in the opening direction and observe the opening-stroke travel-limit cam. At the completion of the switch operator opening stroke, the leading edge of the opening-stroke travel-limit cam should be engaged with its roller. If the leading edge is not engaged with its roller, adjust the opening-stroke travel-limit cam (as described in Step 14) so that its leading edge touches (or nearly touches) the roller. Return the manual operating handle to its storage position.

For switch operators with optlonal remote-control blocking switch (suffix “-Y) , opening the pushbutton protective cover prevents remote operation of the switch operator.

cases, refer to the specific wiring diagram for the correct terminal A Termmal designations may dif€er in special wiring diagrams. In such

designations.

INSTRUCTION SHEET 753400 S&C ELECTRIC COMPANY Chicago Page 9 of 18 S&C ELECTRIC CANADA LTD. Toronto September 7,1993

ADJUSTMENTS - Continued

Switch operatorp o s i t i o n i n d i c a t o r \ -*

Opening-strokem

contactA

/iOpening-strokeroller

Inner gear <*

I

Use when direction of output shaft and travel-limit carnrotation is clockwise to open.

Adjacent spring

Opening-stroketravel-limit cam Opening-stroke travel-limit(in raised position) cam (with switch operator in

fully closed position-raiseand turn cam counterclock-wise to increase travel ofswitch operator)

Switch operatorposition indicator

Closing-stroke travel-limitcam (with switch operator infully open position-lowerand turn cam clockwise toincrease travel of switchoperator)

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

Opening-stroke travel-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)

S&C Switch Operators - Types M-1 and LS-2

I

Figure 6. Adjustment of travel-limit cams.

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1 ADJUSTMENTS - Continued I

Intermediate Adjustment of Travel-Limit CamsStep 16

The adjustments described in this step are requiredto obtain a close approximation of the correct travelof the switch operator in the decoupled position-i.e.,in a no-load condition, in order to avoid inadvertentlyoverdriving the high-voltage switch when the switchoperator is first used for power opening or closing ofthe high-voltage switch.

Closing-Stroke Travel-Limit Cam. With the selectorhandle in the coupled position, manually crank thehigh-voltage switch to its fully closed position. Returnthe manual operating handle to its storage position.Then place the selector handle in the decoupled positionand replace 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 operatorelectrically to open. Remove the motor-circuit fuse-holder. Then adjust the closing-stroke travel-limit cam,as described in Step 14, the necessary number ofincrements to attain numerical alignment of theposition-indexing drums at the completion of a switchoperator closing stroke.

Opening-Stroke Travel-Limit Cam. With the selectorhandle in the coupled position, manually crank thehigh-voltage switch to its fully open position. Returnthe manual operating handle to its storage position.Then place the selector handle in the decoupled positionand replace 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 operatorelectrically to close. Remove the motor-circuit fuse-holder. Then adjust the opening-stroke travel-limit cam,as described in Step 14, the necessary number ofincrements to attain numerical alignment of theposition-indexing drums at the completion of a switchoperator opening stroke.

Final Adjustment of Travel-Limit Camsstep 17

The adjustments described in this step are necessaryto ensure complete opening and closing of the high-voltage switch. Therefore, attention must now bedirected to the open and closed stops of the high-voltageswitch.

Figure 7. Adjustment of cams on auxiliary switch.

A Contact (closed)

Inner gear

Cam (loweredtoward adjacentspring)

I A Adjacent spring

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Page 11 of 18September 7,1993

SBC Switch Operators - Types LS-1 and LS-2 IADJUSTMENTS - Continued

Operate the switch operator electrically to open and close the high-voltage switch. Observe the toggle mechanisms (if applicable) and the open stops on the high-voltage switch. I t 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-i.e., in a no- load condition. To attain full stop positions (and overtoggle positions, where applicable) of the high- voltage switch, refer to Figure 6 and proceed as described below.

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

To increase travel in the closing direction, retard the closing-stroke travel-limit cam one 4.5-degree incre- ment (1) in the clockwise direction if the travel-limit cam and output shaft rotate clockwise to open the high- voltage switch; or (2) in the counterclockwise direction if the travel-limit cam and output shaft rotate counterclockwise to open the high-voltage 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 high-voltage 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 (I) in the counterclockwise direction if the travel-limit cam and output shaft rotate clockwise to open the high-voltage switch; or (2) in the clockwise direction if the travel-limit cam and output shaft rotate

counterclockwise to open the high-voltage 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 18 When travel-limit cam adjustments have been com- pleted, it may be necessary to realign the high-voltage- 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 in the fully closed position, check the corresponding switch operator position indicator. In each position, the corresponding position indicator should be readilyvisible 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 19 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 operations. 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 14 for the travel- limit cams.

The “standard” configuration for the auxiliary switch consists of four “al” contacts (terminals 11 through 18) and four “bl” contacts (terminals 19 through 26).

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1 ADJUSTMENTS - Continued

Thus, with the high-voltage switch in the open position, the “al” contacts are open and the ‘41” contacts are closed. Conversely, with the high-voltage switch 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 high-voltage switch. If necessary, adjust the cams as described in Step 14 so that the auxiliary- switch contacts are in the desired open or closed position (i.e., 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 simultane- ously, sequentially, randomly, or in various combina- tions. 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 remMued when adjusting these contacts. (Switch operators having catalog numbers with the suffix “ - Q are equipped with an extra auxiliary switch, terminals 27 through 34, havingfour contacts“two“a1” and two “b1””which may be adjusted as described in Step 14(a) through (d). See Figure 8.)

Step 20 Switch operators having catalog numbers with either the su f f i “-W” or “-Z” are equipped with an extra auxiliary switch which is permanently coupled to the high-voltage switch. The su f f i “-W” auxiliary switch

consists of eight contacts (terminals 35 through 50). The su f f i ”-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 high- voltage 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 suff i “-W extra auxiliary switch consists of four “a2” contacts (terminals 35 through 42) and four “b2” contacts (terminals 43 through 50). The ”standard” configura- tion for the suffi “-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 high-voltage switch in the fullyclosed position, the “a2” contacts should be closed and the “b2” contacts should be open. Conversely, with the high- voltage 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 satisfactory electrical operation of high-voltage switch has been achieved. Check the auxiliary-switch contact engagement for both the open and closed positions of the high-voltage switch. Adjustment of the suffi “-W or “-Z extra auxiliary switch is identical to the adjustment performed for the travel-limit switch, the auxiliary switch, and the su f f i “-Q“ auxiliary switch. Therefore, if adjustment of the s u f f i “-W” or “-Z” auxiliary switch is needed, refer to Step 14 and Figures 7 and 8.

step 21 Reinsert the fuseholders for the motor circuit and space-heater circuit.

INSTRUCTION SHEET 753=5m S&C ELECTRIC COMPANY Chicago Page 13 of 18 S&C ELECTRIC CANADA LTD. Toronto September 7,1993

S&C Switch Operators - Types M-1 and LS-21 AD3USTMENTS - Continued

Extra auxiliary switch(Catalog NumberSuffix “-w” or ‘I-Z”) ,

Travel-limit switch,auxiliary switch,and extra auxiliaryswitch (CatalogNumber Suffix “-0”)

Open front view of switch operator

Figure 8. “Standard” contact configurations.

7531500 INSTRUCTION SHEETPage 14 of 18September 7,1993

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

ADJUSTMENTS - Continued

Travel-limitswitch

“al” contactsclosed

“bl” contactsopen

“al” contactsclosed

‘bl” contacts3pen

Switch operatorin fully closed position

iI

“a2”contactsclosed

“b2”contactsopen

Auxiliaryswitch,8-PST

Extraauxiliaryswitch,4-PST(CatalogNumberSuffix “42”)

Extraauxiliaryswitch,8-PST(CatalogNumberSuffix ‘I-W’)

“a2” contactsclosed“b2” contactsopen

Travel-limitswitch

“al” contactsopen

“bl” contactsclosed

“al” contactsopen

“bl” contactsclosed

Switch operatorin fully open position

Extraauxiliaryswitch,

’ 12-PST(CatalogNumberSuffix “-Z

“a2”contacts Extraopen auxiliary

switch,’ 8-PST

“b2” (Catalog

contacts Number

closed Suffix ‘I-W’)

i“a2” contactsopen“b2” contactsclosed

Auxiliaryswitch,8-PST

Extq,auxiliaryswitch,4-PST(CatalogNumberSuffix “4”)

Extraauxiliaryswitch,12-PST(CatalogNumberSuffix “-T)

Hlgh-voltage switch in fully closed position High-voltage switch in fully open position

INSTRUCTION SHEET 7531500m s&c ELECTRIC COMPANY l Chicago

S&C ELECTRIC CANADA LTD. l TorontoPage 15 of 18

September 7,1993

S&C Switch Operators - Types LS-1 and LS-2 I INSPECTION SCHEDULE AND PROCEDURES I To assure continued proper performance of Types LS-1 and LS-2 Switch Operators, they should be inspected every 2500 operations or 5 years-whichever occurs more often. De-energize the associated high-voltage switch and perform the following switch operator inspection procedures: 1.

2.

3. 4.

5.

Check for evidence of water ingress, damage, ;(,Id excessive corrosion or wear. Check ease of operation during slow, manual cranking using the switch operator manual oper- ating 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 Figure 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

1/i"-20 X 1 Vi" 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 Ye" to VI". 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 X 1 lh" hex-head screwsecurely; proceed to Step (i).

(d) Remove the four 5/16"-18X 1 Vi'' 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.

(e) Using a 3/3z" Allen wrench, loosen the pad assembly socket-head set screw on the side of the caliper assembly approximately one-half turn. See Detail A.

(f) Then, using a 5/16" Allen wrench, rotate the pad assembly clockwise until the free play at the end of the brake lever is %"to %", 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 W"20X 1%" hex-head screw, lockwasher, and flat washer. Tighten the & + e w securely.

(h) Insert the square key in the keyway, as shown in Detail A. Slip the tubular spacer (iffurnished) 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 5/16"-18 X 1 Vi" screws used to attach the motor and tighten them securely.

(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 careful not to get grease on 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 %" to Vi". See Detail C. Should the measurement be outside this range, refer to the nearest S&C Sales Offke.

Since the switch operator may be conveniently decoupled from the high-voltage switch, elective exercising of the operator may be performed at any time without requiring an outage or switching to an alternate source.

753m500 INSTRUCTION SHEET Page 16 of 18 S&C ELECTRIC COMPANY Chicago September 7,1993 S&C ELECTRIC CANADA LTD. Toronto

I INSPECTION SCHEDULE AND PROCEDURES - Continued I

Motor shaft square key Linkage rod

wrench required)

h Spacer-bushing

\ \Caliper assembly

DETAIL A \ Brake assembly \,

\ ,-Operating linkage

disconnected from brake lever

%" - 34'' vertical free play

DETAIL B Measuring brake lever

free play Operating linkage connected to brake lever

Point of initial manual brake release

Brake lever at bottom of its stroke (manual operating handle in cranking position)

%" - %" travel

DETAIL C Measuring brake lever stroke

Motor-, 'e

lgure 9. Brake inspection procedure.

INSTRUCTION SHEET 753-500 SKC ELECTRIC COMPANY Chicago Page 17 of 18 SKC ELECTRIC CANADA LTD. Toronto September 7,1993

S&C Switch Operators - Types LS-1 and LS-2 I CHECKING SWITCH OPERATOR AND HIGH-VOLTAGE SWITCH POSITIONS I

Do not assume that the switch operator position necessarily indicates the open or closed position of the high-voltage switch. Upon completion of an opening or closing operation (electrical or manual), check to be sure that the following conditions exist: 0 The switch operator position indicator, Figure 5,

signals “Open” or “Closed” to indicate that the switch operator has moved through a complete operation. Also note the position-indicating lamp; Figure 5, if furnished. The high-voltage-switch position indicator, located on the switch operator output shaft, Figure 1, is in agreement with the switch operator position indicator. That is , both indicators should simultane- ously show “Open” or “Closed.”

0 The blades on all three pole-units of the high-voltage switch are fully open or fully closed (by visual verification).

Then tag and padlock the switch operator in accord- ance with standard system operating procedures. In all cases, make certain that the switch operator is padlocked before ’tvalking away.”

To restore to normal operation So that the switch operator is ready for normal power operation of the high-voltage switch by remote automatic or supervisory control, be sure that the following conditions exist

The selector handle is in the coupled position. 0 The manual operating handle is in its storage position. 0 The two-pole pull-out fuseholders for the motor

0 The pushbutton protective cover is closed. The switch operator is tagged and padlocked in accordance with standard system operating pro- cedures.

circuit and space-heater circuit are inserted.

753-500 INSTRUCTION SHEET Page 18 of 18 S&C ELECTRIC COMPANY Chicago September 7,1993 S&C ELECTRIC CANADA LTD. Toronto