Page 1: Table Of Contents
S&C Circuit-Switchers — Mark VI Outdoor Transmission (69 kV through 138 kV) Operation Table of Contents Section Page Section Page Introduction Switch Operation Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Before Operating .
Page 2: Introduction
. The application must be within the ratings furnished for the equipment . Ratings for the Mark VI Circuit-Switcher are listed on the ratings label 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 3: Safety Information
Understanding There are several types of safety-alert messages which may appear throughout this instruction sheet as well as on labels and tags attached to the Mark VI Circuit-Switcher . Safety-Alert Familiarize yourself with these types of messages and the importance of the various sig- Messages nal words, as explained below .
Page 4: Location Of Safety Labels And Tags
Safety Information Location of Safety Labels and Tags Ç WARNING DO NOT operate the Circuit-Switcher with the manual operating handle. The manual operating handle is only intended for use during checkout of the Circuit-Switcher when the Circuit-Switcher is de-energized and isolated.
Page 5: Safety Precautions
Safety Precautions Ç DANGER S&C 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 6: Indicators
NOTICE The interrupter indicators only indicate the state of the interrupter contacts, and Figure 1. Mark VI Circuit-Switcher with blades in the OPEN position. DO NOT indicate the state of the entire Circuit-Switcher . Verify the position of the discon nect blades to determine the “OPEN”...
Page 7: Understanding The Interrupter Indicators
Indicators Understanding the Interrupter Indicators An indicator is located on the underside of each interrupter . The indicators are not meaning- ful while the interrupters are being closed and charged. Wait for the inter rupter charging motors to cease operation before checking indicator position .
Page 8: Understanding The Gas-Pressure Gauge
Indicators Understanding the Gas-Pressure Gauge A temperature-compensated gas-pressure gauge is located on the underside of each interrupter . It shows whether SF gas density is sufficient for a trip operation . The gas-pres sure gauge shows three zones: OK TO OPERATE: This is the white zone .
Page 9 The pole-unit should be removed from service and replaced promptly . Contact your local Figure 7. Gauge needle in red “REPLACE” zone. S&C Sales Office . Do not operate the Mark VI Cir cuit-Switcher . NOTICE At temperatures below -31°F (-35°C), the indicator needle will be in the red zone due to the cold temperature .
Page 10: Understanding The Remote Gas-Density Indicator
. The interrupter should be removed from service and replaced promptly . DO NOT oper ate this Mark VI Circuit-Switcher . The remote gas-density Level 2 alarm con- tact opens at 88% of normal density, or 65 PSIG at 68°...
Page 11: Switch Operation
Step 1 Before operating the Mark VI Circuit-Switcher: a . Check the internal decoupling mechanism inside the Mark VI CS-1A Switch Operator to verify that the selector handle is in the “COUPLED” position . See Figure 9 . b . Check that the manual operating handle is in the storage position, and tagged or pad- locked .
Page 12: Closing The Circuit-Switcher
. See Figure 12 . Verify that the Circuit- Switcher disconnect is open . Step 3 Lift the push button protective cover of the Mark VI CS-1A Switch Operator . For Circuit- “CLOSED and CHARGED” “OK TO OPERATE” zone Switchers with the optional remote-control blocking switch (Catalog Number Suffix “-Y”),...
Page 13: Opening The Circuit-Switcher
DO NOT indi- cate the state of the entire Circuit-Switcher . Step 6 Lift the push button protective cover of the Mark VI CS-1A Switch Operator . For Circuit- Switchers with the optional remote-control blocking switch (Catalog Number Suffix “-Y”), Remote-control...
Page 14 OPEN and CLOSE operations . NOTICE DO NOT disconnect control power while the Mark VI Circuit-Switcher interrupter charging motors are operating . The inter- rupter charging motors will reset to the beginning of the charging cycle when con-...
Page 15: Optional Manual Trip Device
Tripping the Circuit-Switcher Using the Optional Manual Trip Device If furnished, the manual trip device will be located on a swing out panel inside the Mark VI CS-1A Switch Operator . When tripping the Mark VI Circuit-Switcher using the optional manual trip device (Catalog Number Suffix “-T”) the interrupters will trip,...
Page 16 Trip device handle Red LED a . Crank the manual-trip device handle to trip the Mark VI Circuit-Switcher interrupters . Crank the handle between 5 and 10 times . The red LED will start flashing when the manual-trip device is fully charged .
Page 17 Mark VI CS-1A Switch Operator . e . Then press the “OPEN” push button, located on the front of the Mark VI CS-1A Switch Operator, for about one second, or send a remote trip signal to the operator . See Fig- “OPEN”...
Page 18: Inspection Recommendations
Inspection Recommendations To ensure Mark VI Circuit-Switcher’s contin ued proper performance, it should be inspected in accordance with the recom mended schedule and procedures contained in the tables in S&C Data Bulletin 712-90, Inspection Recommendations . RECOMMENDED INSPECTION PROCEDURES FOR S&C CIRCUIT-SWITCHER COMPONENTS...
Page 19: Using The Manual Operating Handle To Operate The Disconnect During Inspection
Verify that the CS-1A Switch Operator is in the “COUPLED” or “DECOUPLED” position by looking at the internal decoupling mechanism inside the Mark VI CS-1A Switch Operator . See Figures 21 and 22 . If the switch operator is “DECOUPLED,” operating the manual handle will only operate the motor inside the Mark VI CS-1A Switch Operator—the disconnect will...
Page 20 See Figure 24 Step 14 Manual Crank the manual operating handle on the operating Mark VI CS-1A Switch Operator until the dis- handle connect blade is in the fully “OPEN” or fully Latch knob “CLOSED” position . Visually inspect the blade...
Page 21: Coupling And Decoupling The Switch Operator For Inspection
Inspection Recommendations Coupling and Decoupling the Switch Operator for Inspection Selector handle Step 18 (being turned to decoupled position) Using the selector handle: The selector handle is used to couple and decouple the motor from the operating shaft . Decoupling the motor allows the user to install and configure control schemes and inspect the operation of the motor without opening and closing the interrupters or dis connect .
Page 22 . Manually operate the manual operating han- dle to bring the disconnect to the same position (open or closed) as the Mark VI CS-1A Switch Operator . See Steps 11 through 16 on pages 19 and 20 for instruc- tions on using the manual operating handle .
Page 23 Inspection Recommendations c . Swing the selector handle upright and rotate it counterclockwise to the coupled position . d . Lower the handle to engage the locking tab . The selector handle is now in the coupled position . NOTICE The selector handle may be padlocked in either position .
Page 24: Inspecting The Operation Of Circuit-Switcher Blades And Blade Contacts
Inspection Recommendations Inspecting the Operation of Circuit-Switcher Blades and Blade Contacts As indicated in S&C Data Bulletin 712-90, the Disconnect operation of the Circuit-Switcher blades and blade the condition of the blade contacts should be inspected every 2500 operations, or every 90°...
Page 25 Inspection Recommendations Step 22 After checking the angle of the blades, check the operation of the disconnect for proper Current-carrying alignment of the blade with the jaw-contact tongue contacts assembly . a . As the disconnect is closed, the fault-clos ing tongue contact should engage each of the Current-carrying Blade...
Page 26: Inspecting The Cs-1A Switch Operator Motor Brake
500 micro-ohms for a unit that has been in service . If Note: 115-volt ac motors utilize a Z\v-20 socket-head a Mark VI interrupter is outside these values, contact your set screw on the side of the brake disc hub, as shown in nearest S&C Sales Office .
Page 27 Inspection Recommendations Ç CAUTION Do not loosen this Z\v – 20 screw . Motor shaft square key Pad assembly socket-head set screw (C\cx Allen wrench required) Linkage rod Brake disc Brake Brake lever disc Angle Z\v – 20 socket-head set screw bracket (Z\, Allen wrench required) Z\v ...

S&C Mark VI Instruction Sheet

Introduction

Safety Information

Safety Precautions

Indicators

Switch Operation

Inspection Recommendations

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