S&C Vista SD Operation Manual
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S&C Vista SD Operation Manual

S&C Vista SD Operation Manual

Underground distribution switchgear with visi-gap load interrupter switches and visi-gap fault interrupters outdoor distribution
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®
S&C Vista
SD Underground Distribution Switchgear
Outdoor Distribution (17.5 kV and 29 kV)

Table of Contents

Section
Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . . . . . 2
Retain this Instruction Sheet . . . . . . . . . . . . . . . . . . . . . . 2
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warranty Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Understanding Safety-Alert Messages . . . . . . . . . . . . . . 4
Following Safety Instructions . . . . . . . . . . . . . . . . . . . . . 4
Replacement Instructions and Labels . . . . . . . . . . . . . . . 4
Single-Way Vault-Mounted Style . . . . . . . . . . . . . . . . 5
Multi-Way Vault-Mounted Style . . . . . . . . . . . . . . . . . 6
Pad-Mounted Style . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Manually Opening or Closing Visi-Gap Load-Interrupter
Switches and Visi-Gap Fault Interrupters
Vault-Mounted Style . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pad-Mounted Style . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Closing the Doors and the Hinged Roof . . . . . . . . . . . . 14
Locking in Open or Closed Position . . . . . . . . . . . . . . . 17
Indication Feature . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Low-Voltage Phasing Using the Optional Voltage-
Indication Feature . . . . . . . . . . . . . . . . . . . . . . . . . . 19
February 13, 2017
© S&C Electric Company 2014-2017, all rights reserved
Operation
Page
Section
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Inspecting Cable Terminations . . . . . . . . . . . . . . . . . . . 21
Pad-Mounted Enclosure Finish . . . . . . . . . . . . . . . . . . . 22
Shear Pin is Unavailable . . . . . . . . . . . . . . . . . . . . . 24
Appendix A
Routine Switchgear Testing . . . . . . . . . . . . . . . . . . . . . . 25
Dc Cable Testing and Fault Locating . . . . . . . . . . . . . . . 25
Fault-Interrupter Testing . . . . . . . . . . . . . . . . . . . . . . . . 27
Appendix B
Switchgear Ratings . . . . . . . . . . . . . . . . . . . . . . . . . 28
Interrupter Switches . . . . . . . . . . . . . . . . . . . . . . . . . 28
Appendix C
Switchgear Styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix D
Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Appendix E
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Appendix F
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
USB Cable Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Appendix G
Touch-Up Kit Components . . . . . . . . . . . . . . . . . . . . . . 34
Appendix H
®
With Visi-Gap
Load
Interrupter Switches and
®
Visi-Gap
Fault Interrupters
Instruction Sheet 695-510
Page

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Summary of Contents for S&C Vista SD

  • Page 1: Table Of Contents

    Multi-Way Vault-Mounted Style . . . . . . . . . . . . . . . . . 6 Vista SD Underground Distribution Pad-Mounted Style .

  • Page 2: Introduction

    Refer to Appendix D starting on page 30 for descriptions of optional features. This instruction sheet is a permanent part of your S&C Vista SD Underground Distribution Switchgear. Designate a location where you can easily retrieve and refer to it.

  • Page 3: Proper Application

    Introduction Proper Application WARNING The equipment in this publication must be selected for a specific application . The applica- tion must be within the ratings furnished for the equipment . Warranty The warranty and/or obligations described in S&C’s standard conditions of sale, as set forth in Price Sheet 150, plus any special warranty provisions, as set forth in the applicable product-line specification bulletin, are exclusive.

  • Page 4: Safety Information

    Understanding Several types of safety-alert messages may appear throughout this instruction sheet and on labels and tags attached to your S&C Vista SD Underground Distribution Switchgear. Familiarize Safety-Alert yourself with these types of messages and the importance of these various signal words:...

  • Page 5: Location Of Safety Labels And Tags

    Safety Information Location of Safety Labels and Tags NOTE: The manual operating handle is stored on a mounting stand (not visible) . NOTE: The Installation and Operation Information Kit is taped to the switchgear assembly . Designate a location where you can easily retrieve it and refer to it .

  • Page 6: Multi-Way Vault-Mounted Style

    Safety Information Location of Safety Labels and Tags NOTE: The manual operating handle is stored on a mounting stand (not visible) . NOTE: The Installation and Operation Information Kit is taped to the switchgear assembly . Designate a location where you can easily retrieve it and refer to it .

  • Page 7: Pad-Mounted Style

    Safety Information Location of Safety Labels and Tags WARNING KEEP OUT Padlock Hazardous voltage inside. Can shock, burn, or cause death. If open or unlocked, immediately call electric company. G-6398 NOTE: The Installation and Operation Information Kit is stored in a slot behind the manual operating handle to the left of Way 1 .

  • Page 8: Safety Precautions

    Safety Precautions DANGER S&C Vista SD Underground Distribution Switchgear operates at high voltage . Failure to observe these precautions will result in serious personal injury or death. Some of these precautions may differ from your company’s operating procedures and rules .

  • Page 9: Components

    200- or 600-ampere taps, laterals, and sub-loops. These elbow-connected components are encapsulated in an environmentally friendly solid-dielectric insulating material. Vista SD switchgear is available in ratings through 29 kV and 16 kA symmetrical interrupting. See Figures 4 and 5 on pages 10 and 11.
  • Page 10 (optional) Overcurrent control Figure 4. S&C Vista SD switchgear has the features and options needed to match user needs. Model 321 (3-way) vault-mounted style unit shown with cables at top, operating mechanism at bottom (Catalog Number Suffix “-V1”). Potential indication...

  • Page 11: Operation

    If the load-interrupter switch or fault interrupter is equipped with a motor operator, refer to S&C Instruction Sheets 695-520, “S&C Vista SD Underground Distribution Switchgear: Installation and Operation of Vista SD Motor Operator,” and 695-525, “S&C Vista SD Underground Distribution Switchgear: Vista SD Portable Remote Control Pendant .

  • Page 12: Pad-Mounted Style

    Operation Pad-Mounted Style STEP 1. Remove the padlock from the gear. See Figure 3 on page 7. Insert a pentahead socket wrench or tool (a hex- STEP 2. head socket wrench or tool when catalog number suffix “-H1” is specified) into the hinged roof latch- ing mechanism.
  • Page 13 Operation Retrieve the manual operating handle from its STEP 6. storage location at the top-left side of the switchgear assembly. The handle is tethered to the switchgear assembly to prevent its removal. See Figure 13. Figure 13. Remove the operating handle from the storage location.

  • Page 14: Closing The Doors And The Hinged Roof

    Operation Closing the Doors and the Hinged Roof STEP 1. Lift the door-holder mechanism up to allow left- side door to swing closed. See Figure 18. Make sure the finger latch engages the pin. See Figure 12(b) on page 12. Lift the door-holder mechanism up to allow right- STEP 2.

  • Page 15: Resetting Visi-Gap Fault Interrupters (All Styles)

    Operation Resetting Visi-Gap Fault Interrupters (All Styles) STEP 1. Check the POSITION indicators to confirm the fault interrupter has tripped. See Figure 21. Figure 21. The POSITION indicator after a fault has occurred. The fault interrupter is open, and the isolating disconnect is closed.
  • Page 16 Operation Repair the fault in accordance with your company’s STEP 6. operating procedures and rules. When you are ready to re-energize the circuit, ro- STEP 7. tate the manual operating handle clockwise to close the fault interrupter. See Figure 25. Figure 25.

  • Page 17: Locking In Open Or Closed Position

    Operation Locking in Open or Closed Position To prevent operation of a load-interrupter switch or fault inter- rupter, insert a padlock through the operating mechanism and the center hole in the locking collar. See Figure 28. (a) Locked open (b) Locked closed Figure 28.

  • Page 18: Checking For Voltage Using The Optional Potential

    Operation Checking for Voltage Using the Optional Potential Indication Feature WARNING Before using the Potential Indication feature, always test for proper operation . If the Potential Indication feature is not operating properly, test for voltage using an alternate method . NOTICE The Potential Indication feature uses a capacitor voltage divider with a ratio of 2400:1 .

  • Page 19: Indication Feature

    STEP 1. surface of the operating mechanism front panel around the Potential Indication feature. Petro- leum-based solvents should not be used on or around Vista SD Underground Distribution Switchgear. STEP 2. Unscrew the aluminum cap covering the Voltage- Indication feature.
  • Page 20 Operation Determine the phase-to-phase relationships of the STEP 4. two ways to be phased as follows: (a) Remove the test probe of the voltmeter from the Neutral Jack. (b) Place one of the test probes on Test Jack 1 of the first way and place the other probe on Test Jack 1 of the second way.

  • Page 21: Maintenance

    Vista® SD Underground Distribution Switchgear: Inspection Recommendations.” DANGER When access to the bushings on S&C Vista SD Under- ground Distribution Switchgear is required for inspection, service, or repairs, always observe the following precau- tions . Failure to observe these precautions will result in serious personal injury or death .

  • Page 22: Pad-Mounted Enclosure Finish

    Maintenance Pad-Mounted Enclosure Finish The responsibility for ensuring a finish protects the enclosure lies with both the manufacturer and the user. S&C Vista SD Underground Distribution Switchgear is finished with the S&C Ultradur® Finishing System, which provides lasting protection for the enclosure. To retain this protection, the user should take periodic corrective action as follows: STEP 1.

  • Page 23: Replacing The Enclosure Latch Shear Pin

    When excessive force is used, the shear pin will break to protect the latching mechanism from damage. See Figure 35. Figure 35. Vista SD enclosure latch mechanism. How to tell if the shear pin is broken: A broken shear pin will render the latching system inoperable.

  • Page 24: Closing And Securing The Enclosure If Replacement

    Maintenance Install one of the retaining rings on one end of the STEP 6. new shear pin. Insert the shear pin into the hole on the side of the latch drive. The pin should go com- pletely through the latch drive and pentahead plug. See Figure 40.

  • Page 25: Routine Switchgear Testing

    Industry standards withstand test values for Vista SD Underground Distribution such as IEEE 400, “IEEE Guide for Making High-Direct-Voltage Switchgear are given in Table 1 and Table 2 on page 26. These Tests on Power Cable Systems in the Field,”...

  • Page 26: Very Low Frequency (Vlf) Cable Testing

    ① because voltage doubling will occur at the open end of the cable, which is assumed to be a unit of Vista SD Underground Distribution Switchgear . If the open end of the cable is grounded, the dc cable-thumping voltage applied to the cable and switchgear can be increased to the dc cable-test voltage .

  • Page 27: Fault-Interrupter Testing

    Appendix A Fault-Interrupter Testing Table 3. Vista SD Switchgear Very Low Frequency (.01- When performing dielectrical tests on Vista SD Underground to 1-Hz) Sinusoidal Waveform Maximum Test Voltages Distribution Switchgear, the vacuum fault interrupters will not be subject to voltage across the open gap because the...

  • Page 28: Vista Sd Underground Distribution

    Appendix B Vista SD Table 4. Vista SD Switchgear Ratings ① Underground Voltage, kV Amperes, RMS Distribution Main Bus Short-Circuit, System Class Continuous Current RMS, Sym. Switchgear Ratings 17 .5 ★ 16 000 (12) (12) (75) (630) 12 500 (24)

  • Page 29: Switchgear Styles

    Appendix C Table 7. Switchgear Styles—Must be Specified Suffix to be Added to Item Switchgear Applicable to Models Catalog Number 110, 101 303, 312, 321, 330 Mild steel 404, 413, 422, 431, 440 mounting stand 505, 514, 523, 532, 541, 550 Vertical orientation, cables 606, 615, 624, 633, 642, 651, 660 enter/exit from top, operating...

  • Page 30: Optional Features

    Appendix D Table 8. Optional Features Suffix to be Added to Item Switchgear Applicable to Models Catalog Number Light gray Equipment green Alternate-color outdoor finish ① Seafoam green Special color Hexhead Bolt in lieu of pentahead bolt ① 210, 201 303, 312, 321, 330 6 inches 404, 413, 422, 431, 440...
  • Page 31 Appendix D Table 8. Optional Features—Continued Suffix to be Added to Item Switchgear Applicable to Models Catalog Number ▲ , 312, 413, 514 210, 321, 422, 523, 624 330, 431, 532, 633 At all load-interrupter switches and bus taps Parking stands ▲...
  • Page 32 Appendix D Table 8. Optional Features—Continued Suffix to be Added to Item Switchgear Applicable to Models Catalog Number Way 1 Way 2 Way 3 ① Key interlock . Locks the load-interrupter switch or fault interrupter in the Open position Way 4 Way 5 Way 6 101, 201, 321, 431, 541, 651...

  • Page 33: Accessories

    Appendix E Table 9. Accessories Item Catalog Number 6-foot-5½-inch length 9933-150 Shotgun clamp stick–for use with separable connectors 8-foot-½-inch length 9933-151 6-foot-6-inch length 9933-152 Storage bag for shotgun clamp stick . Heavy canvas 8-foot-6-inch length 9933-153 Pentahead socket for ½-inch drive 9931-074 Motor operator .

  • Page 34: Touch-Up Kit Components

    Appendix G Table 12. Touch-Up Kit Components—Aerosol coatings in 9-ounce cans Item Catalog Number S&C light gray outdoor finish 9999-080 S&C olive green outdoor finish 9999-058 S&C seafoam green outdoor finish 9991363-493 S&C equipment green outdoor finish 9991363-488 S&C red-oxide primer 9999-061 Appendix H Table 13.

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