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712-502 48

Step 66

Prepare the jaw-end terminal pad as follows:

a. Thoroughly wire-brush the terminal pad

casting.

b. Immediately apply a liberal coating of

Burndy Penetrox A or other suitable
aluminum connector compound to the
clean surface. See Figure 66.

DANGER

Conductors must be de-energized and
grounded in accordance with standard
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 form the conductors
to minimize terminal-pad loadings. Do not
exceed the terminal-pad loadings specifi ed in
Data Bulletin 712-60.

Step 68

After attaching conductors, recheck the
alignment of the disconnect as described in
Step 18.

INSTALLING TERMINAL PADS AND CONDUCTOR

Figure 66. Prepare the jaw-end terminal pad.

Jaw-end
terminal pad

Содержание Mark VI

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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