S&C Vista Instructions Manual

Source-Transfer Vista
Underground Distribution Switchgear
Outdoor Distribution (15.5 kV through 38 kV)
This green leaf icon designates information specifically for Vista Green Underground Distribution Switchgear
that uses an eco-friendly insulating gas. Unless otherwise designated, instructions provided apply to all manual
Vista switchgear products.
Table of Contents
Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Qualified Persons � � � � � � � � � � � � � � � � � � � � � � � � � � � �2
Read this Instruction Sheet � � � � � � � � � � � � � � � � � � � �2
Retain this Instruction Sheet� � � � � � � � � � � � � � � � � � � �2
Proper Application � � � � � � � � � � � � � � � � � � � � � � � � � � �2
Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �2
Safety Information � � � � � � � � � � � � � � � � � � � � � � � � 3
Understanding Safety-Alert Messages � � � � � � � � � � � �3
Following Safety Instructions � � � � � � � � � � � � � � � � � � �3
Replacement Instructions and Labels � � � � � � � � � � � �3
Location of Safety Labels � � � � � � � � � � � � � � � � � � � � � �4
Safety Precautions � � � � � � � � � � � � � � � � � � � � � � � 5
Components � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Overview of Components � � � � � � � � � � � � � � � � � � � � � �6
Understanding the Gas-Pressure Gauge � � � � � � � � �10
Gauge Needle Fluctuations from Rapid Ambient
Temperature Changes � � � � � � � � � � � � � � � � � � � � �11
September 25, 2023
© S&C Electric Company 2000-2023, all rights reserved
and Vista Green
® ®
Operation
With Micro-AT
®
Source-Transfer Control
Operation � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 12
Manually Opening, Closing, or Grounding a Way � 12
Locking Out Grounded Position � � � � � � � � � � � � � � � 16
Locking In Closed, Open, or Grounded Position � � 17
Electrically Opening, Closing, or Grounding a Way 18
Motor Operator Decoupling � � � � � � � � � � � � � � � � � � 22
Checking for Voltage Using Optional Voltage
Indicator � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 24
Low-Voltage Phasing Using Optional Voltage
Indicator with Phasing � � � � � � � � � � � � � � � � � � � � 27
Maintenance � � � � � � � � � � � � � � � � � � � � � � � � � � � � 29
Components � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 29
Returning Equipment to Service � � � � � � � � � � � � � � � 30
Enclosure Finish � � � � � � � � � � � � � � � � � � � � � � � � � � � 30
Maintenance Recommendations in Extremely
Corrosive Environments � � � � � � � � � � � � � � � � � � � 31
Dielectric Testing� � � � � � � � � � � � � � � � � � � � � � � � 32
Routine Switchgear Testing � � � � � � � � � � � � � � � � � � 32
Cable Testing and Fault Locating � � � � � � � � � � � � � � 34
Fault-Interrupter Testing � � � � � � � � � � � � � � � � � � � � � 35
Resistance Measurement � � � � � � � � � � � � � � � � � � � � 36
Instruction Sheet 683-510