February 13, 2017
© S&C Electric Company 2014-2017, all rights reserved
Instruction Sheet 695-510
S&C Vista
®
SD Underground Distribution Switchgear
Outdoor Distribution (17.5 kV and 29 kV)
With Visi-Gap
®
Load
Interrupter Switches and
Visi-Gap
®
Fault Interrupters
Operation
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ..............................2
Read this Instruction Sheet .......................2
Retain this Instruction Sheet ......................2
Proper Application ..............................3
Warranty .....................................3
Warranty Qualifications ..........................3
Safety Information
Understanding Safety-Alert Messages ..............4
Following Safety Instructions .....................4
Replacement Instructions and Labels ...............4
Location of Safety Labels and Tags
Single-Way Vault-Mounted Style ................5
Multi-Way Vault-Mounted Style .................6
Pad-Mounted Style. . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safety Precautions .............................8
Components ..................................9
Operation
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
Resetting Visi-Gap Fault Interrupters (All Styles) .....15
Locking in Open or Closed Position ...............17
Checking for Voltage Using the Optional Potential
Indication Feature ..........................18
Low-Voltage Phasing Using the Optional Voltage-
Indication Feature ..........................19
Maintenance
Components .................................21
Inspecting Cable Terminations ...................21
Pad-Mounted Enclosure Finish ...................22
Replacing the Enclosure Latch Shear Pin ..........23
Closing and Securing the Enclosure If Replacement
Shear Pin is Unavailable .....................24
Appendix A
Routine Switchgear Testing. . . . . . . . . . . . . . . . . . . . . . 25
Dc Cable Testing and Fault Locating. . . . . . . . . . . . . . . 25
Very Low Frequency (VLF) Cable Testing ...........26
Fault-Interrupter Testing ........................27
Appendix B
Vista SD Underground Distribution
Switchgear Ratings .........................28
Ratings for S&C Visi-Gap Load-
Interrupter Switches .........................28
Ratings for S&C Visi-Gap Fault Interrupters .........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
Auxiliary Contacts Receptacle Connector ...........34
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