S&C Mark VI Instructions For Installation Manual Download Page 10

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712-502 10

Installing the Interrupters

Repeat Steps 6 through 12 for each disconnect
pole-unit.

Step 6

Remove the interrupter from its shipping crate
and lift it using the following procedure:

CAUTION

Lift the interrupter

ONLY

by the lifting

bracket.

Lifting it by any other means

can damage the pole-unit.

Wrap a lifting sling around the lifting bracket

at the top of the interrupter. Carefully raise
the interrupter upward. The foam wrappings
around the top, mid-section, and base should
have come off as the interrupter is being lifted.
Remove these wrappings if they do not come off
by themselves.

DO NOT

remove the shipping

brace at this time. See Figures 4, 5, and 6.

CAUTION

DO NOT

remove the shipping brace

around the base of the interrupter at this
time.

Damage to the operating shaft

can occur.

INSTALLATION

Figure 4. Lift the interrupter only by the lifting bracket.

Interrupter

Lifting bracket

Figure 5. Lift the interrupter carefully upward.

Lift upward

Figure 6. Interrupter with wrappings removed.

Interrupter

Shipping brace

Summary of Contents for Mark VI

Page 1: ...NSTALLATION Before Starting 8 Installing the Disconnect Pole Units 9 Installing the Interrupters 10 Checking Operation of Disconnect 15 Installing the Drive Train Gearbox and Interphase Shaft 17 Insta...

Page 2: ...to distinguish exposed live parts from non live parts of electrical equipment The skills and techniques necessary to determine the proper approach distances corresponding to the voltages to which the...

Page 3: ...ility to imme diate purchaser or end user exceed the price of the specific product which gives rise to immediate purchaser s or end user s claim All other warranties whether express or implied or aris...

Page 4: ...ot followed NOTICE NOTICE identifies important procedures or requirements which can result in product or property damage if instructions are not followed Following Safety Instructions If you do not un...

Page 5: ...Message Description Number A WARNING Use push button control to open or close G 9025 B WARNING Do not disassemble or modify G 7015 5 C WARNING DO NOT operate the Circuit Switcher with G 9024 D CAUTION...

Page 6: ...y glasses and flash clothing in accordance with safe operating pro cedures and rules 4 SAFETY LABELS AND TAGS Do not remove or obscure any of the DANGER WARNING CAUTION and NOTICE labels and tags Remo...

Page 7: ...ry assembled and adjusted Drive train operating shafts interphase couplings mounting hardware and a temporary hand adapter for checking the operation of the integral disconnects all individually ident...

Page 8: ...ed mounting structure was not supplied when the switch was ordered the pole units will be furnished with the mounting hole pattern appropriate for Circuit Switchers installed on S C Mounting Pedestals...

Page 9: ...blade contacts Raise the disconnect to the appropriate elevation and position it over the correct set of mounting holes in the mounting structure Avoid sudden starts and stops and avoid contact with o...

Page 10: ...ter upward The foam wrappings around the top mid section and base should have come off as the interrupter is being lifted Remove these wrappings if they do not come off by themselves DO NOT remove the...

Page 11: ...e gas pressure gauge needle should be in the OK to operate zone If the gauge is not in this position stop the installation and notify S C Electric Company Figure 7 With the interrupter lifted off the...

Page 12: ...rrupter support brackets with the four 11 2 cap screws lock washers and nuts furnished The motor bracket should be mounted between the cross support bracket and the interrupter mounting bosses with th...

Page 13: ...osion Step 13 The interrupter to disconnect buswork assemblies are pre assembled to ensure correct hardware placement Unfasten all hardware before installation Prepare the electrical bus connection to...

Page 14: ...hed See Figure 15 Avoid excess tension or torque between the interrupter bus and the disconnect bus If the holes between the two sections of buswork do not line up properly loosen the hardware securin...

Page 15: ...lade opens to 90 to 96 from horizontal See Figure 17 b If the blade does not open 90 to 96 shim underneath the disconnect base as required to make up for any irregularities or distortion in the mounti...

Page 16: ...he silver surfaced current carrying jaw contacts and the blade should rotate with slight pressure against the blade bumper stop and come to rest either on the stop or slightly above it See Figure 18 S...

Page 17: ...a section of vertical operating shaft that is directly driven by the Mark VI CS 1A Switch Operator and a gearbox that connects the vertical operating shaft to the interphase shaft See Figure 19 Figure...

Page 18: ...ssociated erection drawing The gearbox support must hold the gearbox in a position such that the rigid couplings on either side of the gearbox will be level with the couplings on the pole unit drive s...

Page 19: ...to the couplings The interphase shaft should extend slightly past the flange end of the clamp See Figure 22 NOTICE Shaft sections are cut to the appropriate length at the fatory Carefully examine and...

Page 20: ...ee Figure 24 Lift the operator into place on the user furnished mounting structure Avoid sudden starts and stops Step 28 Align the upper and lower flanges on the rear of the operator with the user fur...

Page 21: ...ween the gearbox and operator coupling assemblies The vertical shaft should extend slightly past the flange end of each clamp See Figure 27 If the shaft does not seat correctly or is too long or short...

Page 22: ...nd of the grounding strap to the vertical shaft a few inches above the flexible coupling attached to the switch operator using the grounding connector provided Then fasten the other end of the groundi...

Page 23: ...to the pole unit base Step 36 Locate the four mounting bosses on the top of the motor See Figure 31 Align the mounting bosses with the holes in the motor brackets Rotate the headhook if necessary If...

Page 24: ...Tighten the screws to between 40 and 50 ft lbs See Figure 33 If engaging the headhook with the operating shaft is difficult turn the operating shaft coun terclockwise until it stops approximately one...

Page 25: ...motor along with the entrance plate of the Mark VI CS 1A Switch Operator See Figures 34 and 35 Refer to S C Data Bulletin 712 60 for wire specifications Refer to the wiring diagram and erection drawi...

Page 26: ...ed cycle hand tool CT 1550 or a similar tool for attaching 18 to 20 gauge insulated ring lugs Step 41 Rotate the cover of the electrical junction box and replace the retained screws See Figure 37 Secu...

Page 27: ...10 32 inch round head machine screws retained from Step 50 NOTICE If control power is lost while the Mark VI Circuit Switcher interrupter charging motors are closing and charging the pole units the ju...

Page 28: ...ing instructions DO NOT wire the interrupters and charging motors to the Mark VI CS 1A Switch Operator until directed to do so in the following instructions Two tagged temporary jumpers have been inst...

Page 29: ...he conduit entrance fittings are properly sealed to prevent water ingress CAUTION To avoid accidental energizing of the operator after the external connections have been completed remove the two pole...

Page 30: ...am furnished See Figure 45 CAUTION Unauthorized changes should not be made in the wiring of this switch operator Should a control circuit revision appear desirable it should be made only on the author...

Page 31: ...s pivoted forward the motor brake is mechanically released both leads of the con trol source are automatically disconnected and both the opening and closing motor contactors are mechanically blocked i...

Page 32: ...ting the disconnect Moreover in the decoupled position the switch operator output shaft is prevented from moving by a mechanical locking device located within the switch operator enclosure During the...

Page 33: ...d The position indicator for the disconnect located on the output shaft collar of the switch operator will be aligned later b Turn the manual operating handle slowly until the position indexing drums...

Page 34: ...disconnect position indicators on the output shaft collar of the switch operator with the alignment arrow below See Figure 51 Step 54 Check the drive shaft crank of each pole unit to verify that it is...

Page 35: ...ttons if provided or in their absence by momentarily jumpering Terminals 1 and 8 to open and 1 and 9 to close Note the direction in which the travel limit discs rotate when the switch operator closes...

Page 36: ...displayed in the cutaway section Replace the positioning screws f Reinsert the motor circuit fuseholder and electrically operate the switch operator to the open position g If the direction of output s...

Page 37: ...the output shaft rotates to open the disconnect See Figure 55 e With the handwheel held in the position indi cated above raise the opening stroke travel limit disc approximately of an inch and rotate...

Page 38: ...lly crank the disconnect to the fully closed position b Grasp the handwheel and turn it to the extent possible in a direction opposite to the direc tion the output shaft rotates to close discon nect S...

Page 39: ...ose the disconnect as described in Step 55c Verify that the rotation direction of the travel limit discs for opening and closing corresponds with the direction of rotation of the output shaft and that...

Page 40: ...e position There should always be a certain amount of unwind or relaxation of the output shaft in both the open and closed positions to indicate that Circuit Switcher has been driven to a positive tog...

Page 41: ...mit disc one indicator plate number at a time to obtain the correct amount of overtravel in the closing direc tion Figure 57 Adjustment of travel limit discs for desired unwind of output shaft Use whe...

Page 42: ...tput shaft collar with the alignment arrow See Figure 58 With the switch operator in the fully open position and then in the fully closed position check the corresponding switch operator position indi...

Page 43: ...tor in the closed position the a1 contacts are closed and the b1 contacts are open A contact is closed if its roller is disengaged from a cam and is open if its roller is engaged by a cam See Figures...

Page 44: ...gree increments any a1 contact can be changed to a b1 contact or vice versa Because of the many positions to which the cams can be adjusted various rollers can be engaged or disengaged to open or clos...

Page 45: ...ed and the b2 contacts should be open With the disconnect in the fully open position the a2 contacts should be open and the b2 contacts should be closed See Figure 62 Any Catalog Number Suffix W or Z...

Page 46: ...y jumpers between the inter rupter contacts Discard the jumpers See Figure 63 c Following the wiring diagram furnished make up the electrical connections from the charging motors and interrupters to t...

Page 47: ...nterrupters Step 65 Prepare the interrupter terminal pad attachment as follows a Thoroughly clean the terminal pad using a soft cloth b Thoroughly wire brush the appropriate set of holes on the interr...

Page 48: ...dard system operating practice Failure to do so can result in serious injury or death Step 67 Attach the conductors to their respective terminal pads using flexible conductor connections Attach and fo...

Page 49: ...1A Switch Operator See Figure 67 and 68 If the switch operator is DECOUPLED manually operate the switch operator to bring it into the same position as the disconnect open or closed See Figure 68 For...

Page 50: ...motors should begin closing and charging the interrupter NOTICE The interrupter charging motors have a return to home feature In the event that control power is disconnected during an interrupter char...

Page 51: ...practice Failure to do so can result in serious injury or death Step 73 If the interrupter charging motors do not immediately begin charging remove the fuse holder recheck the wiring connections per t...

Page 52: ...ely fastened Check for damage to the porcelain insulators and inter rupters Clean dirt and grease from the insulation Check that the manual hand crank is not attached to a disconnect If it is remove i...

Page 53: ...upter is being closed and charged If the interrupter is OPEN and discharged the indicator reads OPEN See Figure 71 If the interrupter is CLOSED and charged the indicator reads CLOSED See Figure 72 OPE...

Page 54: ...is in this zone the interrupter is at normal gas density and can be opened and closed See Figure 73 INDICATORS OK to operate but replace This is the yellow zone If the gauge needle is in this zone th...

Page 55: ...nd cannot be relied on to provide an accurate indication of gas density The pole unit should be removed from service and replaced promptly Contact your local S C Sales Office Do not operate the Mark V...

Page 56: ...as density in the interrupter has dropped below the minimum functional level The interrupter will not maintain full interrupting or dielectric ratings The interrupter should be removed from service an...

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