S&C Mark VI Instructions For Installation Manual
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S&C Mark VI Instructions For Installation Manual

S&C Mark VI Instructions For Installation Manual

Circuit-switchers-mark vi outdoor transmission
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S&C Circuit-Switchers-Mark VI
Outdoor Transmission
69 kV through 138 kV
Option "U," User-Furnished Mounting Structure

TABLE OF CONTENTS

Section
Operating Considerations . . . . . . . . . . . . . . . . . . . . . . . .2
Qualifi ed Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . . . .2
Retain this Instruction Sheet . . . . . . . . . . . . . . . . . . . . .2
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Understanding Safety-Alert Messages . . . . . . . . . . . . .4
Following Safety Instructions . . . . . . . . . . . . . . . . . . . .4
Replacement Instructions and Labels . . . . . . . . . . . . . .4
Location of Safety Labels . . . . . . . . . . . . . . . . . . . . . . .5
. . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Before Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Installing the Disconnect Pole-Units . . . . . . . . . . . . . .9
Installing the Interrupters . . . . . . . . . . . . . . . . . . . . . .10
Checking Operation of Disconnect . . . . . . . . . . . . . . .15
Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Vertical Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Installing the User-Furnished Conduit . . . . . . . . . . . .25
S&C ELECTRIC COMPANY
Specialists in Electric Power Switching and Protection
Instructions for Installation
Page
Section
Before Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Control Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Using the Manual Operating Handle . . . . . . . . . . . . . .31
Using the Decoupling Selector Handle . . . . . . . . . . . .32
Adjusting the Switch Operator . . . . . . . . . . . . . . . . . .34
Installing the Terminal Pad . . . . . . . . . . . . . . . . . . . . .47
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Understanding the Gas-Pressure Gauge . . . . . . . . . . .54
Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Supersedes Instruction Sheet 712-502 dated 10-18-04
Page
Instruction Sheet 712-502
©
November 14, 2005
2005

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Summary of Contents for S&C Mark VI

  • Page 1: Table Of Contents

    Shaft ........17 Installing the Mark VI CS-1A Switch Operator and Vertical Shaft .

  • Page 2: Introduction

    —Mark VI. Familiarize yourself with “SAFETY INFORMATION” on pages 4 through 5. Instruction Sheet Retain this This instruction sheet is a permanent part of your S&C Circuit-Switcher—Mark VI. These instructions should be stored in the Mark VI CS-1A Switch Operator instruction manual Instruction Sheet holder on the operator door.

  • Page 3: Proper Application

    The application must be within the ratings furnished for the equipment. The ratings for this Mark VI Circuit-Switcher are listed on the nameplate on the side of the Mark VI CS-1A Switch Operator. Warranty The warranty and/or obligations described in S&C’s standard conditions of sale, as set...

  • Page 4: Safety Information

    There are several types of safety-alert messages which may appear throughout this instruction Safety-Alert sheet as well as on labels and tags attached to the Mark VI Circuit-Switcher. Familiarize yourself with these types of messages and the importance of the various signal words, as...

  • Page 5: Location Of Safety Labels

    SAFETY INFORMATION Location of Safety Labels Reorder Information for Safety Labels Location Safety-Alert Message Description Number Ç WARNING Use push button control to open or close... G-9025 Ç WARNING Do not disassemble or modify... G-7015-5 Ç WARNING DO NOT operate the Circuit-Switcher with... G-9024 Ç...

  • Page 6: Safety Precautions

    SAFETY PRECAUTIONS Ç DANGER Mark VI Circuit-Switchers operate at high voltage. Failure to observe the precautions below will result in serious personal injury or death. Some of these precautions may differ from company operating procedures and rules. Where a discrepancy exists, users should follow their company’s operating procedures and rules.

  • Page 7: Inspection And Packing

    Three interrupter charging motors and their associated mounting hardware are packed in a separate crate. The Mark VI CS-1A Switch Operator is shipped on a separate skid. If furnished, options such as a grounding switch or pre-insertion inductors are shipped in their own crates.

  • Page 8: Installation

    Mounting brackets, channel sections, or spacers may be supplied with the Mark VI Circuit-Switcher to facilitate instal- lation on the existing user-furnished structure. Refer to the supplied custom erection drawing...

  • Page 9: Installing The Disconnect Pole-Units

    NOTICE Lifting slings Hinge end of disconnect A crane or other suitable lifting device pole-unit is required to install the Mark VI Circuit- Blade Switcher. Ensure that an appropriate lifting device is available at the installation Jaw end of site before beginning the Circuit-Switcher disconnect installation.

  • Page 10: Installing The Interrupters

    INSTALLATION Installing the Interrupters Repeat Steps 6 through 12 for each disconnect Interrupter pole-unit. Step 6 Remove the interrupter from its shipping crate and lift it using the following procedure: Ç CAUTION Lift the interrupter ONLY by the lifting bracket. Lifting it by any other means can damage the pole-unit.
  • Page 11 INSTALLATION Step 7 With the interrupter lifted off the ground, check that the gas-pressure gauge on the underside of the interrupter is in the “OK” to operate zone. See Figures 7 and 8. NOTICE The gas-pressure gauge needle should be in the “OK” to operate zone. If the gauge is not in this position, stop the Interrupter indicators installation and notify S&C Electric...
  • Page 12 INSTALLATION Step 8 Remove the shipping brace from the interrupter Interrupter mounting bosses (bosses on base. See Figure 9. Discard the bolt. Bolt rear of interrupter base not shown) Ç CAUTION Interrupter DO NOT rest the interrupter on its base Interrupter mounting after the shipping brace has been removed.
  • Page 13 INSTALLATION Step 11 Position the interrupter mounting brackets so that the holes in the brackets align with the holes in the pole-unit base. See Figure 12. Interrupter Attach the interrupter mounting brackets to the mounting pole-unit base using eight ⁵⁄₈–11 2¹⁄₄...
  • Page 14 INSTALLATION Step 14 ¹⁄₂–13 Prepare the electrical connection to the 1¹⁄₄ stainless-steel Disconnect casting cap screws and lockwashers disconnect bus as follows: a. Thoroughly clean the interrupter bus with a soft cloth. Wire-brush the interrupter Disconnect bus casting. b. Immediately apply a liberal coating of Burndy Penetrox®...

  • Page 15: Checking Operation Of Disconnect

    INSTALLATION Checking Operation of Disconnect Repeat Steps 17 through 19 for each pole-unit. Temporary handle Step 17 Drive shaft crank Check operation of the blade using the following procedure: a. Bolt the temporary manual operating handle to the disconnect drive-shaft crank. See Figure 16.
  • Page 16 INSTALLATION Step 18 Check operation of the blade for proper alignment of the blade with the jaw-contact Current-carrying assembly. As the blade is closed, the fault- tongue contacts closing tongue contact should engage each of the fault-closing jaw contacts with equal pressure and the current-carrying tongue Current-carrying contact should enter the current-carrying jaw...

  • Page 17: Installing The Drive Train, Gearbox, And Interphase

    Mark VI CS-1A Switch Operator and a gearbox that connects the vertical operating shaft to the interphase shaft. See Figure 19.
  • Page 18 INSTALLATION Before installing the interphase shaft sec- tions, attach all flexible coupling assemblies to the disconnect drive shafts and the output end of the gearbox (if necessary) where indicated on the reference drawing. Note that the rigid couplings to and from the gearbox are factory-installed to the gearbox.

  • Page 19: Shaft

    INSTALLATION Step 24 Flexible coupling plate Attach the fl exible coupling plate to the coupling Coupling fl ange on the disconnect using the following fl ange procedure: Thread the flexible coupling attachment bolts through the flexible coupling plate and through the coupling flange.

  • Page 20: Installing The Mark Vi Cs-1A Switch Operator And Vertical Shaft

    34 (864 mm) Remove the lifting slings from the output shaft of the switch operator. Lower flange 3 (76 mm) 9 (229 mm) 15 (381 mm) Figure 25. Attach the Mark VI CS-1A Switch Operator mounting fl anges to the structure. 712-502...
  • Page 21 INSTALLATION Step 30 The fl exible couplings are pre-installed on the gearbox and Mark VI CS-1A Switch Operator. If required, attach the fl exible coupling to the output shaft of the switch operator and to the input coupling of the gearbox using the following procedure: Coupling fl...
  • Page 22 INSTALLATION Step 33 Remove the lifting slings from the output shaft of the switch operator. Step 34 Fasten the free end of the grounding strap to Grounding strap the vertical shaft a few inches above the fl exible coupling attached to the switch operator, using the grounding connector provided.

  • Page 23: Installing The Interrupter Charging Motors

    INSTALLATION Installing the Interrupter Charging Motors Repeat Steps 35 through 37 for each interrupter. Mounting Step 35 bracket Manually rotate the operating shaft counter- clockwise approximately ¹⁄₄-turn until it is centered as shown in Figure 30. The operating shaft pin should be parallel to the pole-unit base.
  • Page 24 INSTALLATION Step 37 Hook the headhook onto the operating shaft pin. The headhook should hang securely from the operating shaft. Turn the motor until the Operating shaft mounting bosses align with the holes in the mounting brackets. See Figure 32. Using the four ¹⁄₂...

  • Page 25: Installing The User-Furnished Conduit

    ¹⁄₂-14 NPT conduit tap on the Conduit entrance associated charging motor, along with the entrance plate of the Mark VI CS-1A Switch Operator. See Figures 34 and 35. Refer to S&C Figure 34. Connect conduit to the interrupter junction box.

  • Page 26: Wiring The Interrupters And Charging Motors

    INSTALLATION Wiring the Interrupters and Charging Motors Repeat Steps 39 through 45 for each interrupter Interrupter and charging motor. Ç CAUTION DO NOT remove the window bolts on the interrupter. The interrupter is pressurized to Outer motor bracket 75 PSIG. Serious injury could occur. Step 39 Remove the outer motor bracket.
  • Page 27 INSTALLATION Step 42 ⁵⁄₈ inch Remove and retain the eight 10-32 stainless-steel round-head machine screws that secure the motor cover to the motor housing. Remove the motor cover, and set the cover and screws aside in a protected area. See Figure 39.

  • Page 28: Wiring And Adjusting The Switch Operator

    WIRING AND ADJUSTING THE SWITCH OPERATOR Before Starting Make sure the Mark VI CS-1A Switch Operator is securely attached to the structure and that the vertical shaft is attached to the coupling on the output shaft of the switch operator.

  • Page 29: Connecting Control Power And User-Furnished Control Circuits

    WIRING AND ADJUSTING THE SWITCH OPERATOR Connecting Control Power and User-Furnished Control Circuits Step 46 Mark the conduit entrance location for the control-circuit and control-power wiring on the conduit entrance plate at the bottom of the switch operator enclosure. See Figure 43. Remove the conduit entrance plate and cut out Space Space...
  • Page 30 WIRING AND ADJUSTING THE SWITCH OPERATOR NOTICE DO NOT connect the wiring from the interrupters or interrupter charging motors at this time. Complete the installation and testing of the control circuit wiring before wiring the interrupters and charging motors. The charging motors take approxi- mately two minutes to close and charge the interrupters and can cause unnecessary delays in installation.

  • Page 31: Using The Manual Operating Handle

    Vertical shaft Ç WARNING Piercing set screws Flexible coupling DO NOT operate the Mark VI Circuit- Switcher with the manual operating handle while the switch is energized. The manual operating handle should only be used during Manual installation and checkout of the switch.

  • Page 32: Using The Decoupling Selector Handle

    WIRING AND ADJUSTING THE SWITCH OPERATOR Using the Decoupling Selector Handle Selector handle Step 51 (being turned to The selector handle is used to couple and decoupled position) decouple the motor from the operating shaft. Decoupling the motor allows the user to install and confi...
  • Page 33 To couple: a. Manually operate the manual operating handle to bring the disconnect to the same position (open or closed) as the Mark VI CS-1A Switch Operator. The switch opera- tor position indicator, seen through the observation window, will show when the approximate open or closed position has been attained.

  • Page 34: Adjusting The Switch Operator

    WIRING AND ADJUSTING THE SWITCH OPERATOR Adjusting the Switch Operator Clamp bolts Ç CAUTION To avoid accidentally energizing the opera- Piercing set tor, remove the two-pole pull-out fuseholders screws for the motor and space heater. DO NOT Flexible reinsert them until directed in the steps coupling below.
  • Page 35 WIRING AND ADJUSTING THE SWITCH OPERATOR Step 55 Output shaft NOTICE The cranking direction to close the disconnect is indicated by an arrow plate located near the hub of the manual operating handle, and is set at the factory. DO NOT attempt to adjust the motor direction or cranking direction without fi...
  • Page 36 WIRING AND ADJUSTING THE SWITCH OPERATOR NOTICE Positioning screws Opening-stroke travel-limit disc (in raised position) Terminal designations may differ in special wiring diagrams. In such cases, refer to the specifi c wiring diagram for correct terminal designations. d. If the direction of rotation of the travel-limit discs noted in (c) above is opposite to the temporary direction mark, a reversal of the Arrow (on cutaway section)
  • Page 37 WIRING AND ADJUSTING THE SWITCH OPERATOR Adjust the opening-stroke travel-limit as Adjustment of Travel-Limit Discs follows: Indicator Plate Number a. Remove the motor-circuit fuseholder. Opening-Stroke Adjustment Closing-Stroke Adjustment b. Place the selector handle in the coupled Counterclockwise Counterclockwise Clockwise to Open Clockwise to Close to Open to Open...
  • Page 38 WIRING AND ADJUSTING THE SWITCH OPERATOR Step 57 Adjust the closing-stroke travel-limit disc (and the associated cams) as follows: a. Manually 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.
  • Page 39 WIRING AND ADJUSTING THE SWITCH OPERATOR Step 58 To preclude the possibility of a malfunction (with possible equipment damage) due to improper adjustment, perform the following check: a. Place the selector handle in the decoupled position. b. Return the manual operating handle to its storage position.
  • Page 40 Check the amount of unwind in the output shaft: a. Place the selector handle in the coupled position. Operate the Mark VI CS-1A Switch Operator electrically to open the Circuit- Switcher and determine the amount of overtravel in the opening direction by releas- ing the motor brake and noting how far the output shaft “unwinds.”...
  • Page 41 WIRING AND ADJUSTING THE SWITCH OPERATOR c. If rotation of the travel-limit disc is evident, Use when direction of output shaft and travel-limit disc rotation advance the opening-stroke travel-limit disc is clockwise to open. (to decrease travel) an amount necessary only to eliminate the “unwind”...
  • Page 42 WIRING AND ADJUSTING THE SWITCH OPERATOR Step 60 Screws Screws Check operation of the disconnect by operating the switch operator several times to observe the action. Operation should appear smooth, Disconnect position indicator with the disconnect drive-shaft cranks (closed position) coming to rest fi...
  • Page 43 WIRING AND ADJUSTING THE SWITCH OPERATOR Step 61 The auxiliary switch, which is permanently coupled to the motor, includes eight contacts, Extra auxiliary/switch Terminals 11 through 26. (If the optional (Catalog Number Suffi x position-indicating lamps are included, six “-W” or “-Z”) contacts are available: Terminals 13 through 18 and Terminals 21 through 26.) These contacts permit external circuits to be established to...
  • Page 44 WIRING AND ADJUSTING THE SWITCH OPERATOR c. Determine which “a1” contacts are not in the closed posi- positioned for both the open and closed position of the tion. A contact is closed if its roller is disengaged from a disconnect. Suffi cient adjustment is available to provide cam, and is open if its roller is engaged by a cam.
  • Page 45 WIRING AND ADJUSTING THE SWITCH OPERATOR Step 62 With the disconnect in the fully closed position, the “a2” Switch operators furnished with either Catalog Number contacts should be closed and the “b2” contacts should be Suffi x “-W” or “-Z” are equipped with an extra auxiliary switch open.
  • Page 46 Control power will be applied during “Startup” on page 49. Figure 63. Remove temporary jumpers and wire the interrupters to the appropriate terminals in the Mark VI CS-1A Switch Operator per the wir- ing diagram. 712-502...

  • Page 47: Installing Terminal Pads And Conductor

    See Bolts Figure 64. Ç CAUTION The lifting brackets must be removed before energizing the Mark VI Circuit-Switcher. Failure to do so can result in damage to the interrupters. Step 65 Prepare the interrupter terminal pad attachment as follows: a.
  • Page 48 INSTALLING TERMINAL PADS AND CONDUCTOR 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 Jaw-end aluminum connector compound to the terminal pad clean surface.

  • Page 49: Circuit-Switcher Startup And Checkout

    CIRCUIT-SWITCHER STARTUP AND CHECKOUT Startup Ç DANGER Conductors must be de-energized and grounded in accordance with standard sys- tem operating practice. Failure to do so can result in serious injury or death. Step 69 Verify that the disconnect is in the “COUPLED” position by looking at the internal decoupling mechanism inside the CS-1A Switch Operator.
  • Page 50 CIRCUIT-SWITCHER START-UP AND CHECK-OUT Step 70 Crank the manual operating handle on the Mark VI CS-1A Switch Operator until the disconnect is in the fully “OPEN” position. Visually inspect Blades the blade to confi rm it is open. See Figure 69. For instructions on using the manual operating handle refer to Step 50.
  • Page 51 CIRCUIT-SWITCHER START-UP AND CHECK-OUT Ç DANGER Conductors must be de-energized and grounded in accordance with standard sys- tem operating 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 the furnished wiring diagram and reapply power...

  • Page 52: Checkout

    CIRCUIT-SWITCHER START-UP AND CHECK-OUT Checkout • Check that the manual hand crank is not attached to a disconnect. If it is, remove it. The following instructions assume that the switch operator output shaft has been connected to the disconnect drive •...

  • Page 53: Indicators

    INDICATORS Understanding the Interrupter Indicators The interrupter indicators are located underneath the interrupter base. The indicators are not meaningful while the interrupter is being closed and charged. If the interrupter is “OPEN” and discharged, the indicator reads “OPEN.” See Figure 71. “OPEN”...

  • Page 54: Understanding The Gas-Pressure Gauge

    INDICATORS Understanding the Gas-Pressure Gauge The temperature-compensated gas-pressure gauge is located underneath the interrupter base. It shows whether SF gas density is suffi cient for interrupting faults at full rating. The gas-pressure gauge shows three zones: OK to operate: This is the white zone. If the gauge needle is in this zone, the interrupter is at normal gas density, and can be opened and closed.
  • Page 55 The pole-unit should be removed from service and replaced promptly. Contact your local S&C Sales Office. Do not operate the Mark VI Circuit-Switcher. NOTICE At temperatures below -31°F (-35°C), the indicator needle will be in the red zone due to the cold temperature.

  • Page 56: Understanding The Optional Remote Gas-Density Indicator

    The interrupter should be removed from service and replaced promptly. DO NOT operate this Mark VI Circuit-Switcher. The remote gas-density Level 2 alarm contact opens at 88% of normal density, or 65 PSIG at 68°...

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