S&C Switch Operators - Types LS- and LS-2 NSTRUCTONS For nstallation TABLE OF CONTENTS i Section Page Number Section Page Number NTRODUCTON... 1 NSPECTON SCHEDULE AND PROCEDURES....16 NSTALLATON... 3 CHECKNG SWTCH OPERATOR AND HGH-VOLTAGE MANUALOPERATON... 6 SWTCH POSTONS......18 ADJUSTMENTS... 8 NTRODUCTON The equipment covered by this publication must be selectedforaspecificapplication and it mustbe 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 Operators-Types M-lA 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 disengagement of output shaft. 0 Open-close pushbuttons, externally operable, with padlockable cover. SWTCH OPERATORS-Types LS-1 and LS-2 High-Voltage Device Application Rating of High-Voitage Device Switch Operator Type Ma;? Control Voltage Operating lime, Seconds@ Minimum Locked-Rotor Maximum Torque at RaledControl Voltage, inch-lbr. :r:; Number Schematic Wiring Diagram Drawing Number Outdoor Disconnects and 7,2 kv thru 48 v dc 18 000 27 38857R1-A interrupter Swltches LS-1 4 to 7* CDR-3133 345 kv Not of S8C Manufacture 125 v dc 21 500 10 38857R1-0 S8C Line-Rupters - 115 kvthru 48 v dc 18000 3891 5-A 30 Ls-2 2.2 CDR-3238 230 kv v dc 21 500 125 15 38915-8 - @ Basedonminunumbatteryand external control w e sue requirements Depending on torquerequirements of the dlsconnect or interrupter specified n S&C Data Bulletin 753-60 operating time wil be less if larger- switch, and assuming 180-degree vertical-pipe rotation. than-mlnimum battery sue and/or external control wire size is utilized Supersedes lnstructlon Sheet 753-500 dated 12-11-89 1993 NSTRUCTON SHEET 753-500 COMPANY ELECTRC S&C Page Chicago 1 of 18 S&C ELECTRC CANADA LTD. September Toronto 7,1993
~ ~~ S&C Switch Operators - Types LS- and LS-2 NTRODUCTON - Continued 0 Built-in nonremovable, foldaway manual operating handle. 0 Mechanical position indicators for both switch operator and high-voltage switch "open" and "closed" positions. 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. mpossible with positionindexing drums to couple the switch operator and the high-voltage switch "unsynchronized." 0 Fingertip precision adjustment of limits of outputshaft 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 reconnected 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 (%", 2", 2M", or 3" PS, 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: suffii -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: ACCESSORES tem Suffix Added to Switch Operator Catalog Number Deletion of Externally Operable Open-Close Pushbuttons -J Space Heater Thermostat -K Key nterlock wlth Swltch, locks high-voltage swltch open and disconnects motor-control ctrcult Posltton-lndlcating Lamps (one red, one green), mounted inside the enclosure Extra Auxihary Switch (mdlvldually adjustable contacts), 4-PST (coupled to motor) Duplex Receptacle and Convenlence-Light Lampholder with Swltch Extra Auxlllary Swltch (indlvldually adjustable contacts), 8-PST (coupled to high-voltage switch)@ Remote-Control Blocking Switch, prevents remote operatlon of switch operator when the protective cover for the externally mounted open-close pushbuttons is open 1 Extra Auxlhary Swltch @ The 8-PST extra auxaary switch (suffix "-W) cannot be furnlshed if the 12-PST versmn (suffur "-Zm) is specified. and me versa (ndividually adjustable contacts), 12-PST (coupled to high-voltage switch)@ -Z -L " -Q -V -W -Y 753400 NSTRUCTON SHEET Page 2 of 18 S&C COMPANY ELECTRC S&C CANADA ELECTRC Chicago LTD. 0 Toronto
1 NSTALLATON step 1 Bolt the switch operator in position with %-inch mounting hardware, using any two of the four holes in each of the mounting angles at the rear of the switch operator. Step 2 Attach, to the switch operator output shaft, the flexible coupling furnished for the vertical operating pipe. See Figure 1. Thread the attachment bolts through the flexible coupling plate and through the coupling flange on the output shaft. Tighten the bolts to draw the flexible plate flush against the flangt; this will deform the threads in the flexible plate, resulting in a binding, nonslip connection. nstall and tighten the self-locking nuts. & not use lockwashers with thejlexible coupling attachment bolts. Remove the clamp bolts and set aside the detachable half of the flexible coupling. step3 Place the high-voltage switch pole-units in their fully closed positions. nstall the interphase and verticaloperating-pipe sections. However, at the switch operator, do not attach the vertical pipe section to the switch operator output shaft until so directed in Step 9. Attachment bolt Flexible coupling plate Vertical operating lamp bolts Switch output Flexible coupling High-voltage-switch position indicators Self-locking nut Alignment arrow cover Manual operating handle (in storage position) Door handle- Selector handle L Switch operator nameplate Figure 1. Exterior view of switch operator. Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 7531500 Page3of 18
S&C Switch Operators- Types M-1 and LS-2 Step 4 Mark the conduit-entrance location for the controlcircuit wiring on the conduit-entrance plate in the bottom of the switch operator enclosure. See Figure 2. Remove the conduit-entrance plate and cut out the required opening. Replace the plate and make up the entrance fittings. Apply sealing compound (provided with each switch operator) when replacing the conduitentrance plate. Verify that the entrance fittings are properly sealed to prevent water ingress. Step 5 To avoid accidental energizing of the operator after the external connections have been completed, remove the two-pole pull-out fuseholders for the motor circuit and space-heater circuit. See Figure 2. Reinsert the fuseholders only when indicated in the steps which follow. Remove the blocking from the motor contactors. Pushbutton protective cover (open) \ Operation counter Remote-control blocking switch (Catalog Number Suffix -Y ) Position-indexing Open-close pushbuttons - Travel-limit switch, 2-PST (not visible Arrow plate Auxiliary switch, 8-PST Extra auxiliary switch, / 8-PST (Catalog Number Suffix -W ); 1%PST version (Catalog Number Suffix -Z ) is similar. Extra auxiliary switch, 4-PST (Catalog Number Suffix 42 ) Motor contactor, opening Motor contactor, closing Conduit-entrance plate Figure 2. interior views of switch operator.. Motor-circuit two-pole E pull-out fuseholder - (control-source fuses and two-pole controlsource disconnect switch on earlier models) Manual operating handle interlock switch and mechanical blocking rods 753-500 NSTRUCTON SHEET Page 4 of 18 S&C ELECTRC COMPANY Chicago * S&C ELECTRC CANADA LTD. Toronto
1 NSTALLATON - Continued C&nect the external control-circuit wiring (including space-heater source leads) to the terminal blocks of the switch operator in accordance with the wiring diagram furnished. ments for the control-circuit wiring, as shown in S&C Data Bulletin 753-60 and on the switch operator schematic wiring diagram furnished. Unauthorized changes should not be made in the wiring of this switch operator. Should a controlcircuit revision appear desirable, it should be made only on the authority of a revised wiring diagram which has been approved by both the user and S&C Electric Company. Pushbutton protective cover (closed) Duplex receptacle and convenience-iiqht iamp-holder with swi&h (Catalog Number Suffix 4 ) Position-indicating lamps (Catalog Number Suffix -M ) instruction manual and holder -Q Space-heater circuit A two-pole pull-out fuseholder (space heater fuses on earlier models) Brake-release solenoid \ Terminal block Filter holder Space heater Door gasket S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 7531500 Page 5 of 18 September 7,1883
S&C Switch Operators - Types M-1 and LS-2 MANUAL OPERATON Before proceeding further, the user should become familiar with the operation of the manual operating handle and the selector handle, as described on the switch operator nameplate on the right-hand side of the enclosure and in the following Steps 6, 7, and 8. See Figures 3 and 4. Manual operation of the switch operator to open or close an energized disconnect switch or interrupter switch is not recommended. The reduced operating speed, due to hand cranking, will shorten the life of, and may damage, the arcing horns (or interrupting units). f switch operater control voltage is not available and high-voltage circuit conditions permit emergency manual opening, crank the manual operating handle rapidly and continuously through its full travel. Manual closing of an energized disconnect switch or interrupter switch should be avoided because of the possibility of closing into a fault. Step 6 To operate manually: Pull the latch knob on the hub of the manual operating handle and pivot the handle forward slightly from its storage position. Release the latch knob while continuing to pivot the handle forward to lock it into the cranking position. See Figure 3. (As the handle is pivoted forward, the motor brake is mechanically released, both leads of the control source are automatically disconnected, and both the opening and closing motor contactors are mechanically blocked in the open position.) f desired, during manual operation, the switch operator may also be disconnected from the control source by removing 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 storage position, pull the latch knob and pivot the handle approximately 90 degrees. The handle will then be disengaged from the switch operator and may be rotated freely in either direction to its storage position. Piercing set screws Vertical operating Flexible coupling Manual operating handle Selector handle Latch knob Switch operator nameplate Figure 3. Manual operation. 753-500 Page 6 of 16 NSTRUCTON SHEET S&C ELECTRC COMPANY Chicago - S&C ELECTRC CANADA LTD. Toronto wfl
MANUAL OPERATON - Continued Complete the handle storage by pivoting the operating handle backward approximately 90 degrees until it latches in the storage position. Note that the manual operating handle may be disengaged from the switch operator mechanism at any position of the handle. The handle may be padlocked in its storage position. Step 7 To decouple: The integral external selector handle, for operation of the built-in internal decoupling mechanism, is located on the right-hand side of the switch operator enclosure. See Figure 3. Swing the selector handle upright and slowly rotate it clockwise 50 degrees to the decoupled position. See Figure 4. This decouples the switch operator mechanism from the switch operator output shaft. Then lower the selector handle to engage the locking tab. When thus decoupled, the switch operator may be operated either manually or electrically without operating the high-voltage switch. When the selector handle is in the decoupled position, the output shaft is prevented from moving by a mechanical locking device located within the switch operator enclosure. During the intermediate segment of the selector handle travel, &rich includes the position at which actual disengagement (or engagement) of the internal decoupling mechanism occurs, the motorcircuit source leads are momentarily disconnected and both the opening and closing motor contactors are mechanically blocked in the open position. Visual inspection, through the observation window, will verify whether the internal decoupling mechanism is in the coupled or decoupled position. See Figure 5. The selector handle may be padlocked in either position. for the high-voltage switch, located on the output-shaft collar of the switch operator, will be aligned later.) To move the switch operator to the exact position for coupling, turn the manual operating handle slowly until the position-indexing drums are, numerically aligned. Then swing the selected, handle upright and rotate it counterclockwise to the coupled position. Lower the handle to engage the locking tab. The selector handle is now in the coupled position. Selector handle (being turned to decoupled position) tabs step 8 To couple: Manually operate the switch operator to bring it to the same position (open or closed) as the high-voltage switch. The switch operator position indicator, seen through the observation window, will show when the approximate open or closed position has been attained. See Figure 5. (The position indicator Figure 4. Seleclor handle operation. ed S&c ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 7531500 Page 7 of 16
S&C Switch Operators- Types B-1 and LS-2 ADJUSTMENTS Step 9 To avoid accidental energizing of the operator, remove the two-pole pull-out fuseholders for the motor circuit and space-heater circuit and do not 1 reinsertthem until so directed. 1 Make certain that the main contacts on all highvoltage switch pole-units are fully closed. With the selector handle in the coupled position, manually crank the switch operator to the fully closed position as indicated by the switch operator position indicator. See Figure 5. At the switch operator output shaft, replace the detachable portion of the coupling clamp. Make certain that the cutting tips of the piercing set screws do not protrude through the body of the coupling. Torque the flexible coupling clamp bolts equally to final tightness, so that the clamp pulls down evenly on the vertical operating-pipe section. Then tighten the associated piercing set screws, piercing the pipe, and continue turning until a firm resistance is felt. See Figure 3. Step 10 With the selector handle in the coupled position, crank the high-voltage switch to the fully open position, then to the fully closed position, and in each position accurately align the high-voltage-switch position indicators on the output-shaft collar of the switch operator with the alignment arrow below. See Figure 1. Each high-voltage-switch position 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. step 11 The cranking direction to close the high-voltage switch is indicated by an arrow plate located near the hub of the manual operating handle. See Figure 5. n the event that the cranking direction required to close the high-voltage 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 13.) Temporarily mark on the top of the switch operator enclosure the direction in which the output shaft rotates to close the high-voltage switch. step 12 Place the selector handle in the decoupled position in preparation for electrical operation. - - Position-indicating lamps (Catalog Number Suffix -M ) Position-indexing r drums T-T- -Operation counter nternal decoupling mechanism (in coupled position) :mj Selector handle (in deco Jpled position) nternal decoupling mechalism (in decoupled position) Switch operator position indicators Figure 5. Views of switch operator through observation window. 753-500 Page 6 of 16 NSTRUCTON SHEET S&C ELECTRC COMPANY Chicago - S&C ELECTRC CANADA LTD. Toronto
JADJUSTMENTS 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.) n 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 wil be necessary. Remove the motor-circuit fuseholder to avoid accidental or remote energization of the control circuit. nterchange the Sl and S2 motor leads connected to terminals 4 and 5 on the terminal block in the switch operator enclosure. t 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 closingstroke 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 (aswell 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 (adjustable 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. f the leading edge is not engaged with its roller, adjust the closing-stroke travellimit cam (asdescribed 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. f the leading edge is not engaged with its roller, adjust the opening-stroke travel-limit cam (asdescribed 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 protectivecoverpreventsremote operation of the switch operator. A Termmal designations may dif er in special wiring diagrams. n such cases, refer to the specific wiring diagram for the correct terminal designations. NSTRUCTON SHEET 753400 S&C ELECTRC COMPANY Page Chicago 9 of 18 S&C CANADA ELECTRC LTD. Toronto
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SBC Switch Operators - Types LS-1 and LS-2 ADJUSTMENTS - 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. t is likely that full opening and closing travel wil 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 noload condition. To attain full stop positions (and overtoggle positions, where applicable) of the highvoltage switch, refer to Figure 6 and proceed as described below. Closing-Stroke Travel-Limit Cam. f 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 increment (1) in the clockwise direction if the travel-limit cam and output shaft rotate clockwise to open the highvoltage 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. f full closing travel has not been attained, repeat the procedure described above until full closing travel is attained. Opening-Stroke Travel-Limit Cam. f 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 () 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. f 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 completed, it may be necessary to realign the high-voltageswitch 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. n each position, the corresponding position indicator should be readilyvisible from the front of the enclosure. f 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). f 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 travellimit 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). 753=5m NSTRUCTON SHEET. Page 12 of 18 S&C ELECTRC COMPANY Chicago S&C ELECTRC LTD. CANADA Toronto
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. f necessary, adjust the cams as described in Step 14 so that the auxiliaryswitch 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 simultaneously, sequentially, randomly, 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 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 suffi -W or -Z are equipped with an extra auxiliary switch which is permanently coupled to the high-voltage switch. The suffi -W auxiliary switch consists of eight contacts (terminals 35 through 50). The suffi -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 highvoltage 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 suffi -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 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 highvoltage 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 suffi -Q auxiliary switch. Therefore, if adjustment of the suffi -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 space-heater circuit. and NSTRUCTON SHEET 753=5m S&C ELECTRC COMPANY Page Chicago 13 of 18 S&C ELECTRC LTD. CANADA September Toronto 7,1993
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ADJUSTMENTS - Continued Travel-limit switch Travel-limit switch al contacts closed bl contacts open Auxiliary switch, 8-PST al contacts open bl contacts closed Auxiliary switch, 8-PST al contacts closed bl contacts 3pen Extra auxiliary switch, 4-PST (Catalog Number Suffix 42 ) al contacts open bl contacts closed Extq, auxiliary switch, 4-PST (Catalog Number Suffix 4 ) Switch operator in fully closed position Switch operator in fully open position i a2 contacts closed b2 contacts open a2 contacts closed b2 contacts open Extra auxiliary switch, 8-PST (Catalog Number Suffix -W ) Extra auxiliary switch, 12-PST (Catalog Number Suffix -Z a2 contacts Extra open auxiliary switch, 8-PST (Catalog b2 Number contacts Suffix -W ) closed i a2 contacts open b2 contacts closed Extra auxiliary switch, 12-PST (Catalog Number Suffix -T) Hlgh-voltage switch in fully closed position High-voltage switch in fully open position m s&c ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 7531500 Page 15 of 18
S&C Switch Operators - Types LS-1 and LS-2 NSPECTON SCHEDULE AND PROCEDURES 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. Check for evidence of water ingress, damage, ;(,d excessive corrosion or wear. 2. Check ease of operation during slow, manual cranking using the switch operator manual operating handle. 3. Check electrical operation, coupled and decoupled. 4. Check for loose wiring inside enclosure and proper functioning of position-indicating lamps, operation counter, convenience lamp, etc. ' 5. 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 of end 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 V". Should the measurement be outside this range, brake-wear compensation is required; proceed to Step (d). f 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) nsert 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 &+ew securely. (h) nsert 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 two the 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 NSTRUCTON SHEET Page 16 of 18 S&C ELECTRC COMPANY Chicago S&C ELECTRC LTD. CANADA Toronto
NSPECTON SCHEDULE AND PROCEDURES - Continued Linkage rod key square shaft Motor wrench required) \ \Caliper assembly DETAL A \ Brake assembly \, \,-Operating linkage disconnected from brake lever %" - 34' vertical free play h Spacer-bushing Motor-, 'e DETAL 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 DETAL C Measuring brake lever stroke lgure 9. Brake inspection procedure. NSTRUCTON SHEET 753-500 COMPANY ELECTRC SKC Chicago Page 17 of 18 LTD. CANADA ELECTRC SKC September Toronto 7,1993
S&C Switch Operators - Types LS-1 and LS-2 CHECKNG SWTCH OPERATOR AND HGH-VOLTAGE SWTCH POSTONS 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 simultaneously 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 accordance with standard system operating procedures. n 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 circuit and space-heater circuit are inserted. 0 The pushbutton protective cover is closed. The switch operator is tagged and padlocked in accordance with standard system operating procedures. 753-500 NSTRUCTONSHEET Page 18 of 18 S&C ELECTRC COMPANY Chicago S&C ELECTRC LTD. CANADA Toronto