INSTRUCTIONS For Field Adjustment

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1 S&C Circuit-Switchers - Mark V* Outdoor Transmission Replacement Rotating-nsulator of Brain Assembly or Bearing NSTRUCTONS For Field Adjustment TABLE OF CONTENTS Section Page Number Section Page Number NTRODlJCTON l LATCH-GAP MEASJREMENT AND ADJUSTMENT OVERTRAVEL MEASJREMENT AND ADJUSTMENT NTRODUCTON overtravel of the interrupting rod arm and the main rod arm. Attainment of these two interrelated The equipment covered by this publication must be conditions is necessary to ensure proper seating of the inspected by qualified persons who are thoroughly rod arm latches, as well as correctly sequenced trained and who understand any hazards that may operation of the interrupting rod and the main rod. be involved. This publication is written only for such Proper latch-gap adjustment will also be checked and, qualified persons and is not intended to be a if necessary, adjusted. Attainment of proper latch gap substitute for adequate training and experience in is essential for close interpole tripping simultaneity, and safety procedures for this type of equipment. to ensure that the circuit is cleared within the interrupters before the disconnect current-carrying contacts separate. These instructions are for field adjustment of the brains on S&C Mark V Circuit-Switchers. This procedure is Before proceeding with the brain adjustment recommended only if a pole-unit has been disassembled procedure, the pole-unit must be reassembled and to replace a brain assembly or a rotating-insulator readjusted in accordance with the field assembly and bearing. adjustment instruction sheet originally furnished with the device. n the steps which follow, the brain will be checked and, if necessary, adjusted to obtain adequate * The ~nstructlons contamed hereln are also applicable to Mark 111 and Mark V C~rcu~t-Sw~tchers New NSTRUCTON SHEET S&C COMPANY ELECTRC Chicago Page 1 of 13 LTD. S&C CANADA ELECTRC Toronto 17,1991 June

S&C Circuit-Switchers - Mark V Outdoor Transmission OVERTRAVEL MEASUREMENT AND ADJUSTMENT Replacement of Brain Assembly or Rotating-nsulator Bearing Normal system practices must be followed to ensure

Step 1 After following the user s standard procedures for clearing and tagging equipment on which work is to be performed, open the switch by pressing the OPEN pushbutton on the switch 0perator.

step 3 At the brain of the pole-unit which had been previously disassembled, remove the four 3/ -l 6 X 1 /q hex-head stainless-steel cap screws (two of which are special shoulder bolts) from the

For shunt-trip-equipped Circuit-Switchers only: Slide down the silicone-rubber weather-sealing boot to expose the shunt-trip operating shaft tongue-andgroove joint.

On shunt-trip-equipped Circuit-Switchers it will be necessary to rotate the cover counterclockwise to disengage it from the shunt-trip operating shaft.

2 S&C Circuit-Switchers - Mark V Outdoor Transmission OVERTRAVEL MEASUREMENT AND ADJUSTMENT Replacement of Brain Assembly or Rotating-nsulator Bearing Normal system practices must be followed to ensure that the high-voltage switch is de-energized, isolated from high-voltage sources, and grounded at all six terminals before proceeding with the work described below. Step 1 After following the user s standard procedures for clearing and tagging equipment on which work is to be performed, open the switch by pressing the OPEN pushbutton on the switch 0perator.A Step 2 With the disconnect in the fully open position, remove the fuseholder for the motor circuit and (if applicable) the fuseholder for the shunt-trip circuit from the switch operator. step 3 At the brain of the pole-unit which had been previously disassembled, remove the four 3/ -l 6 X 1 /q hex-head stainless-steel cap screws (two of which are special shoulder bolts) from the brain cover. See Figure 1. Retain the screws. For shunt-trip-equipped Circuit-Switchers only: Slide down the silicone-rubber weather-sealing boot to expose the shunt-trip operating shaft tongue-andgroove joint. Use a small screwdriver, if necessary, to pry the brain cover loose, but be careful not to damage the internal O-ring seal. On shunt-trip-equipped Circuit-Switchers it will be necessary to rotate the cover counterclockwise to disengage it from the shunt-trip operating shaft. A Open close pushbuttons are not mcluded on swtch operators specified wth Catalog Number Suffix -J. n such instances, momentarily jumper terminals 1 and 8 to open the Cuvut-Switcher. (Termmal designations may differ rn special wiring diagrams. n such cases, refer to the specific w&g diagram-for the cor&t terminal designations.) Disconnect fullv 013en.- -Brain cover expose shunt-trip Locating pin / jolint wr -16X1% hexhead stainless-steel / cap screws 1 nt-trio operating shaft Figure 1. Removing brain cover. Shunt-trip equipped Vertical-Break Style Circuit-Switcher shown NSTRUCTON SHEET Page 2 of 13 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto

OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 4 To prevent serious injury to hands resulting from inadvertent tripping, do not make an interruptingrod-arm

After ensuring that the brain is in the correct position in accordance with the above warning, insert a 6-inch scale into the brain housing.

See Figure 2. Record this reading. Now remove the scale and take your hands out of the brain housing!

nsert the scale again and read the relative position of the interrupting rod arm on the scale. Record this reading.

The difference between these readings represents the interrupting-rod-arm overtravel, and should be /s inch minimum, 7/3z inch maximum.

3 OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 4 To prevent serious injury to hands resulting from inadvertent tripping, do not make an interruptingrod-arm measurement unless the disconnect is at or near its fully open position, as shown in Figure 2. After ensuring that the brain is in the correct position in accordance with the above warning, insert a 6-inch scale into the brain housing. Position it so that its righthand edge touches the base of the aluminum interrupting rod nut, and read the relative position of the interrupting rod arm on the scale. See Figure 2. Record this reading. Now remove the scale and take your hands out of the brain housing! Slowly crank the manual operating handle a maximum of 1% turns in the closing direction. nsert the scale again and read the relative position of the interrupting rod arm on the scale. Record this reading. Now remove the scale and take your hands out of the brain housing! The difference between these readings represents the interrupting-rod-arm overtravel, and should be /s inch minimum, 7/3z inch maximum. f the difference is within the specified range, proceed to Step 5. f the difference is not within the specified range, overtravel adjustment is required... Proceed to Step 6 for Vertical-Break Style and nteger Style Circuit-Switchers; proceed to Step 7 for Center-Break Style Circuit-Switchers. rod nut To prevent serious injury to hands resulting from inadvertent tripping, do not make an interrupting-rod-arm measurement unless the disconnect is at or near its fully open position, as shown. r W / c Position 2 + c Position min, 7f22 c- max- S&C ELECTRC COMPANY 0 Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 71 l-662 Page 3,of 13 June 17,f991

S&C Circuit-Switchers - Mark V Outdoor Transmission Replacement of Brain Assembly or Rotating-nsulator Bearing 1 OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 5 To prevent serious injury to

Crank the manual operating handle back to the fully open position.

of the aluminum main rod nut, and read the relative position of the main rod arm on the scale. See Figure 3. Record this reading. Now remove the scale and take your hands out of the brain housing!

Now remove the scale and take your hands out of the brain housing! The difference between these readings represents the main-rod-arm overtravel, and should be l/s inch minimum, T/X? inch maximum.

.. Proceed to Step 6 for Vertical-Break Style and nteger Style Circuit-Switchers; proceed to Step 7 for Center-Break Style Circuit- Switchers.

4 S&C Circuit-Switchers - Mark V Outdoor Transmission Replacement of Brain Assembly or Rotating-nsulator Bearing 1 OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 5 To prevent serious injury to hands resulting from inadvertent tripping, do not make a main-rod-arm measurement unless the disconnect is at or near its fully open position, as shown in Figure 3. Crank the manual operating handle back to the fully open position. After ensuring that the brain is in the correct position in accordance with the above warning, insert the scale back into the brain housing, position it so that its right-hand edge touches the base of the aluminum main rod nut, and read the relative position of the main rod arm on the scale. See Figure 3. Record this reading. Now remove the scale and take your hands out of the brain housing! Slowly crank the manual operating handle a maximum of 1% turns in the closing direction. nsert the scale again and read the relative position of the main rod arm on the scale. Record this reading. Now remove the scale and take your hands out of the brain housing! The difference between these readings represents the main-rod-arm overtravel, and should be l/s inch minimum, T/X? inch maximum. f the difference is within the specified range, proceed to LATCH-GAP MEA- SUREMENT AND ADJUSTMENT on page 9. f the difference is not within the specified range, overtravel adjustment is required... Proceed to Step 6 for Vertical-Break Style and nteger Style Circuit-Switchers; proceed to Step 7 for Center-Break Style Circuit- Switchers. - Main rod nut J Disconnect at or near fully open position To prevent serious injury to hands resulting from inadvertent tripping, do not make a main-rod-arm measurement unless the disconnect is at or near its fully open position, as shown. \ Mair rod arm B-inch scale. Right-hand edge of scale touches base of main 6-inch scale / Y Position 2 Position % min, l/32 max T Figure 3. Main-rod-arm measurement. Vertical-Break Style Circuit&uitcher shown NSTRUCTON SHEET Page4of 13 S&C ELECTRC COMPANY Chicago - S&C ELECTRC CANADA LTD. Toronto

OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 6 f overtravel adjustment is required on a Vertical-Break Style or nteger Style Circuit-Switcher perform the following: (a) Crank the switch

(b) Continue to slowly turn the manual operating handle a few more degrees--just to the point at which the disconnect current-carrying tongue contacts disengage their respective currentcarrying jaw

(c) Loosen the four % - 13 X 1 l/q hex-head galvanized steel cap screws (on switches rated 34.

5 OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 6 f overtravel adjustment is required on a Vertical-Break Style or nteger Style Circuit-Switcher perform the following: (a) Crank the switch fully closed. Then slowly turn the manual operating handle just until all three interrupters are heard to trip. (b) Continue to slowly turn the manual operating handle a few more degrees--just to the point at which the disconnect current-carrying tongue contacts disengage their respective currentcarrying jaw contacts. See Figure 4. With the disconnect in this position, draw a vertical positioning mark across the brain mounting flange and the rotating insulator cap. See Figure 5. (c) Loosen the four % - 13 X 1 l/q hex-head galvanized steel cap screws (on switches rated 34.5 kv through 69 kv) or the four 5/s -1 1 X 1 l/q hex-head galvanized steel cap screws (on switches rated 115 kv through 161 kv) which attach the brain mounting flange to the rotating insulator cap. See Figure 5. m Disconnect / i Current-carrying tongue contacts Current-carrying jaw contacts Figure 4. Position of disconnect required for performing overtravel adjustment on Vertical-Break Style or nteger Style Circuit-Switcher. Also position of disconnect required for performing latch-gap adjustment on Vertical-Break Style or nteger Style Mark V or Mark V Circuit-Switcher. S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 7 4 l& WV- Page 5 of 13 June T,1991

S&C Circuit-Switchers - Mark V Outdoor Transmission OVERTRAVEL MEASUREMENT AND ADJUSTMENT -

overtravel: Pull the disconnect up slightly-the brain mounting flange will rotate

To decrease overtravel: Push the disconnect down slightly-the brain mounting flange will rotate

(e) Securely tighten the cap screws which attach the brain mounting flange to the rotating

(f) Repeat Step 4 until the difference between the interrupting-rod-arm measurements is within

measurements is within the specified range.

Discbnnect with currentcarrying tongue contacts positioned as shown in Figure 4 34.

6 S&C Circuit-Switchers - Mark V Outdoor Transmission OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Replacement of Brain Assembly or Rotating-insulator Bearing (d) To increase overtravel: Pull the disconnect up slightly-the brain mounting flange will rotate counterclockwise with respect to the rotating insulator cap. To decrease overtravel: Push the disconnect down slightly-the brain mounting flange will rotate clockwise with respect to the rotating insulator cap. (e) Securely tighten the cap screws which attach the brain mounting flange to the rotating insulator cap. (f) Repeat Step 4 until the difference between the interrupting-rod-arm measurements is within the specified range and/or repeat Step 5 until the difference between the main-arm-rod measurements is within the specified range. Then proceed to LATCH-GAP MEASUREMENT AND ADJUST- MENT on page 9. Discbnnect with currentcarrying tongue contacts positioned as shown in Figure kv through 69 kv: X 1% hex-head galvanized steel cap screws 115 kv through 161 kv: 5/i -1 1 X 1% hex-head galvanized steel cap screws Brain mounting flange y Positioning mark Rotating insulator cap - Figure 5. Overtravel adjustment on Vertical-Break Style or nteger style Crrcuir-swucner. 7 1 l-662 NSTRUCTON SHEET Page 6 of 13 S&C ELECTRC COMPANY. Chicago S&C ELECTRC CANADA LTD. Toronto

OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 7 f overtravel adjustment is required on a

Then slowly turn the manual operating handle just until all three interrupters are heard to trip.

the current-carrying tongue contacts on the terminal-end blade assemblies disengage the

With the disconnect in this position, remove the four 5/16 -i8x3/qn hex-head stainless-steel cap

Position of disconnect required for performing overtravel adjustment on Center-Break Style

7 OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued Step 7 f overtravel adjustment is required on a Center-Break Style Circuit-Switcher, perform the following: (a) Crank the switch fully closed. Then slowly turn the manual operating handle just until all three interrupters are heard to trip. (b) Continue to slowly turn the manual operating handle a few more degrees-just to the point at which the current-carrying tongue contacts on the terminal-end blade assemblies disengage the current-carrying jaw contacts on the interrupterend blade assemblies. See Figure 6. With the disconnect in this position, remove the four 5/16 -i8x3/qn hex-head stainless-steel cap screws and lockwashers which attach the linkage cover to the top of the brain housing. See Figure 6. Retain the screws. _ Current-carrying jaw contacts 5h -18X% hex-head cap screws - Linkage cover Figure 6. Position of disconnect required for performing overtravel adjustment on Center-Break Style Circuit-Switcher. Also position of disconnect required for performing latch-gap adjustment on Center-Break Style Mark V or Mark V Circuit- Switcher. S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 71 lm662 Page)7 of 13 June 17,lggl

S&C Circuit-Switchers - Mark V Outdoor Transmission Replacement of Brain Assembly or Rotating-nsulator Bearing

drive link and increase the effective length of the drive link by turning it one turn in the direction shown in

To decrease overtravel: Loosen the locking nuts on the drive link and decrease the effective length of the

(d) Repeat Step 4 until the difference between the interrupting-rod-arm measurements is within the specified

housing, and securely tighten the four s/16 ---1SXW hexhead stainless-steel cap screws.

8 S&C Circuit-Switchers - Mark V Outdoor Transmission Replacement of Brain Assembly or Rotating-nsulator Bearing OVERTRAVEL MEASUREMENT AND ADJUSTMENT - Continued 1 (c) To increase overtravel: Loosen the locking nuts on the drive link and increase the effective length of the drive link by turning it one turn in the direction shown in Figure 7 (top inset). To decrease overtravel: Loosen the locking nuts on the drive link and decrease the effective length of the drive link by turning it one turn in the direction shown in Figure 7 (bottom inset). (d) Repeat Step 4 until the difference between the interrupting-rod-arm measurements is within the specified range and/or repeat Step 5 until the difference between the main-arm-rod measurements is within the specified range. Then securely tighten the locking nuts on the drive link, replace the linkage cover to the top of the brain housing, and securely tighten the four s/ SXW hexhead stainless-steel cap screws. Proceed to LATCH-GAP MEASUREMENT AND ADJUST- MENT on page 9. - To increase overtravel, turn one turn in direction shown. r Locking nuts To decrease overtravel, turn one Urn in direction shown. Figure 7. Overtravel adjustment on Center-Break Style Circuit-Switcher. 7 1 l-662 NSTRUCTON SHEET Page 8 of 13 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto

9 LATCH-GAP MEASUREMENT AND ADJUSTMENT For latch-gap measurement and adjustment instructions for 69-kv single-gap Mark V, Mark V, or Mark 11 Circuit-Switchers in ungrounded capacitorswitching applications only, disregard Steps 8 through 16 which follow, and instead refer to S&C nstruction Sheet Close the switch handle. Step 8 by cranking the manual operating Step 9 Slowly crank the manual operating handle and listen for simultaneity of tripping of the interrupters. From the point at which one interrupter trips, no more than 40 degrees of rotation should be required before the other two interrupters trip. f no more than 40 degrees of rotation are required, proceed to Step 15. f excessive rotation is required, however, latch-gap adjustment is necessary... Proceed to Step 10 (for Mark V and Mark V Circuit-Switchers) or Step 11 (for Mark 111 Circuit-Switchers). Step 10 For Mark V and Mark V Circuit-Switchers only: Use the manual operating handle to fully open and then reclose the switch. Now slowly turn the manual operating handle, just until all three interrupters are heard to trip. Note which interrupter is the last to trip. On Vertical-Break Style or nteger Style Mark V and Mark VCircuit-Switchers: Continue to slowly turn the manual operating handle a few more degrees-just to the point at which the disconnect currentcarrying tongue contacts disengage their respective currentcarryingjaw contacts; see Figure 4. On Center-Break NSTRUCTON SHEET S&C COMPANY ELECTRC Chicago Page 9 of 13 CANADA ELECTRC S&C Toronto June 17,1991

S&C Circuit-Switchers - Mark V Outdoor Transmission LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Replacement of Brain Assembly or

the manual operating handle a few more degrees--just to thepoint at which thecurrentcarrying tongue contacts on the terminal-end blade

disengage the current-carrying jaw-contacts on the Use a small screwdriver, if necessary, to pry the brain interrupter-end blade assemblies;

cover loose, but be careful not to damage the internal With the switch in this position, remove-at the brain of the last pole-unit to trip-the

On shunt-trip-equipped Mark V and Mark V Circuit-Switchers it will be necessary to rotate the cover counterclockwise to disengage it from the

cover Disconnect with currentcarrying tongue contacts positioned as shown in Figure 4.

10 S&C Circuit-Switchers - Mark V Outdoor Transmission LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Replacement of Brain Assembly or Rotating-nsulator Bearing Style Mark V and Mark V Circuit-Switchers: Continue On shunt-trip-equipped Mark V and Mark V Circuitto slowly turn the manual operating handle a few more degrees--just to thepoint at which thecurrentcarrying tongue contacts on the terminal-end blade assemblies Switchers, slide down the silicone-rubber weathersealing boot to expose the shunt-trip operating shaft tongue-and-groove joint. disengage the current-carrying jaw-contacts on the Use a small screwdriver, if necessary, to pry the brain interrupter-end blade assemblies; see Figure 6. cover loose, but be careful not to damage the internal With the switch in this position, remove-at the brain of the last pole-unit to trip-the four %&--16X 1% hex-head stainless-steel cap screws (two of which are special shoulder bolts) from the brain O-ring seal. On shunt-trip-equipped Mark V and Mark V Circuit-Switchers it will be necessary to rotate the cover counterclockwise to disengage it from the shunttrip operating shaft. cover. See Figure 8. Retain the screws. Proceed to Step 12. cover Disconnect with currentcarrying tongue contacts positioned as shown in Figure 4. On Center-Break Style Circuit-Switcher, disconnect should be positioned as shown in Fiqure 6. 3/e - 18X1% hex-head stainless-steel cap screws %h x Figure 8. Removing brain cover on Vertical-Break Style or nteger Style Mark V or Mark V Circuit-Switcher. Center-Break Style Mark V and Mark V Circuit-Switchers are similar NSTRUCTON SHEET Page 10 of 13 June 17,1991 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto

LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Step 11 For Mark Circuit-Switchers only: Use

Now slowly turn the manual operating handle, just until all three interrupters are heard to

With the disconnect in the fully open position, remove-at the brain of the last pole-unit to

shoulder bolts) from the brain cover. See Figure 9. Retain the screws.

boot to expose the shunt-trip operating shaft tongue-andgroove joint.

counterclmkwise to disengage it from the shunt-trip operating shaft.

11 LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Step 11 For Mark Circuit-Switchers only: Use the manual operating handle to fully open and then reclose the switch. Now slowly turn the manual operating handle, just until all three interrupters are heard to trip. Note which interrupter is the last to trip. Continue to crank the manual operating handle. With the disconnect in the fully open position, remove-at the brain of the last pole-unit to trip-the four 3/s - 16 X 1% hex-head stainless-steel cap screws (two of which may be special shoulder bolts) from the brain cover. See Figure 9. Retain the screws. On shunt-trip-equipped Mark Circuit-Switchers, slide down the silicone-rubber weather-sealing boot to expose the shunt-trip operating shaft tongue-andgroove joint. Use a small screwdriver, if necessary, to pry the brain cover loose, but be careful not to damage the internal O-ring seal. On shunt-trip-equipped Mark Circuit- Switchers it will be necessary to rotate the cover counterclmkwise to disengage it from the shunt-trip operating shaft. Proceed to Step 13 w--f6 x 1% her-head stafnless-sleet cap screws Disconnect/ fully open Figure 9. Removing brain cover on Circuit-Switcher is similar. Style or nteger style Circuit-swncner. bryle MarK Chicago S&C ELECTRC CANADA LTD. Toronto NSTRUCTON SHEET 71 l-662 Page 11 of 13

S&C Circuit-Switchers - Mark V Outdoor Transmission Replacement of Brain Assembly or

prevent serious injury to hands resulting from inadvertent tripping, do not adjust the

opened further than shown m Figure 4 or Figure 6, smce the stored-energy springs in the

socket wrench, turn the socket-head latch-gap adjusting screw approximately /z turn

See Figure 16 This latch-gap adjustment will result in earlier tripping of the

For Mark Vand Mark V Circuit-Switchers mly: Using a G-inch Allen wrench socket (such as

Allen wrench socket attached to %-inch socket To opened further than shown in Figure 4

Adjusting latch gap on Vertical-Break Style or nteger Style Mark V or Mark V

12 S&C Circuit-Switchers - Mark V Outdoor Transmission Replacement of Brain Assembly or Rotating-nsulator Bearing 1 LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Step 12 To prevent serious injury to hands resulting from inadvertent tripping, do not adjust the latch-gap adjusting screw on Mark V or Mark V Circuit- Switcher with the disconnect opened further than shown m Figure 4 or Figure 6, smce the stored-energy springs in the brain may be charged. socket wrench, turn the socket-head latch-gap adjusting screw approximately /z turn clockwise. See Figure 16 This latch-gap adjustment will result in earlier tripping of the interrupter. Proceed to Step 14. For Mark Vand Mark V Circuit-Switchers mly: Using a G-inch Allen wrench socket (such as Snap-On Tools Corporation Part Number FA4A) attached to a 3/&inch Disconnect 7 %-inch Allen wrench socket attached to %-inch socket To prevent serious injury to hands resulting from inadvertent tripping, do not adjust the latch-gap adjusting screw on Mark V or Mark V Circuit- Switcher with the disconnect opened further than shown in Figure 4 or Figure 6 since the stored-energy springs in the brain may be charged.. Figure 10. Adjusting latch gap on Vertical-Break Style or nteger Style Mark V or Mark V Circuit-Switcher. Center-Break Mark V and Mark V Circuit-Switchers are similar. 7 1 lm662 NSTRUCTON SHEET Page 12 of 13 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto

LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Step 13 To prevent serious injury to hands resulting from inadvertent tripping, do not adjust the latch-gap adjusting screw on Mark

For Mark Circuit-Switchers only: Using a s/u-inch Allen wrench socket (such as Snap-On Tools Corporation Part Number FA6A) attached to a %-inch socket wrench, turn the socket-head

Step 14 Repeat Steps 8,9, 10, and 12 (for Mark V and Mark V Circuit-Switchers) or Steps 8,9,11, and 13 (for Mark Circuit-Switchers) until the requisite degrees of rotation of the

To avoid multiple iterations of this procedure, don t adjust the brains at more than two of the pole-units.

Secure each brain cover using W ---16X 1 l/q hex-head stainless-steel cap screws (taking care to replace the special shoulder bolts-if present-in their correct positions) and, if

The switch can now be returned to service.

13 LATCH-GAP MEASUREMENT AND ADJUSTMENT - Continued Step 13 To prevent serious injury to hands resulting from inadvertent tripping, do not adjust the latch-gap adjusting screw on Mark Circuit-Switcher unless the disconnect is fully open, as shown in Figure 9, since the stored-energy springs in the brain may be charged. For Mark Circuit-Switchers only: Using a s/u-inch Allen wrench socket (such as Snap-On Tools Corporation Part Number FA6A) attached to a %-inch socket wrench, turn the socket-head latch-gap adjusting screw approximately /z turn counterclockwise. See Figure 11. This latch-gap adjustment will result in earlier tripping of the interrupter. Step 14 Repeat Steps 8,9, 10, and 12 (for Mark V and Mark V Circuit-Switchers) or Steps 8,9,11, and 13 (for Mark Circuit-Switchers) until the requisite degrees of rotation of the manual operating handle, from the point at which one interrupter trips to the point at which the other two interrupters trip, is less than or equal to 40 degrees. To avoid multiple iterations of this procedure, don t adjust the brains at more than two of the pole-units. Step 15 Replace the brain cover(s) using the locating pin on each brain housing (if furnished) as a positioning guide. See Figure 8. Be careful not to damage the O-ring seal. Secure each brain cover using W ---16X 1 l/q hex-head stainless-steel cap screws (taking care to replace the special shoulder bolts-if present-in their correct positions) and, if applicable, replace the shunt-trip operating shaft weather-sealing boot. Step 16 Replace the fuseholder for the motor circuit and/or the fuseholder for the shunt-trip circuit. The switch can now be returned to service. To prevent serious injury to hands resulting from inadvertent tripping, do not adjust the latch-gap adjusting screw on Mark Circuit-Switcher unless the disconnect is fully open since the stored-energy springs in the brain may be charged. Latch-gap screw adjustil Figure 11. Adjusting latch gap on Vertical-Break Style or nteger Style Mark Circuit-Switcher. center-ureak style c;ircuil- Switcher is similar. NSTRUCTON SHEET 7 1 l-662 S&C ELECTRC COMPANY Chicago S&C ELECTRC CANADA LTD. Toronto Page 13 of 13

Instructions for Installation. S&C ELECTRIC COMPANY Specialists in Electric Power Switching and Protection TABLE OF CONTENTS INTRODUCTION INSTALLATION

Instructions for Installation. S&C ELECTRIC COMPANY Specialists in Electric Power Switching and Protection TABLE OF CONTENTS INTRODUCTION INSTALLATION S&C Alduti-Rupter Switches Outdoor Distribution Three-Pole Double-Break Style and Three-Pole Double-Break Integer Style Live Parts Replacement on Switches with Catalog Number Supplement -R10 34.5 kv and