February 1, 2021
© S&C Electric Company 2014-2021, all rights reserved
Instruction Sheet 695-505
Vista
®
SD Underground Distribution Switchgear
Outdoor Distribution (17.5 kV and 29 kV)
With Visi-Gap
®
Load-Interrupter
Switches and Visi-Gap
®
Fault Interrupters
Installation
Table of Contents
Section
Page
Section
Page
Introduction
Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . 2
Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . . 2
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . 2
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
Shipping and Handling
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Installation
Vault-Mounted Style
Switchgear Placement . . . . . . . . . . . . . . . . . . . . .12
Single-Way Vault-Mounted Style Unit
Installed Through 31
½
-Inch Manhole . . . . . . . . .13
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Grounding
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Fault Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Pad-Mounted Style
Switchgear Placement . . . . . . . . . . . . . . . . . . . . .16
Access to Interior . . . . . . . . . . . . . . . . . . . . . . . . .16
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Attach Hinged-Roof Counterweights . . . . . . . . . 20
Install Termination Compartment
Cover Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Fault Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Closing the Doors and the Hinged Roof . . . . . . 23
Completing the Installation . . . . . . . . . . . . . . . . . 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
