June 11, 2012© S&C Electric Company
Instruction Sheet 712-501
S&C Circuit-Switchers — Mark VI
Outdoor Transmission (69 kV through 138 kV)
Operation
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Information
Understanding Safety-Alert Messages . . . . . . . . . . . . . 3
Following Safety Instructions . . . . . . . . . . . . . . . . . . . . . 3
Replacement Instructions and Labels . . . . . . . . . . . . . . 3
Location of Safety Labels and Tags . . . . . . . . . . . . . . . . 4
Safety Precautions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Indicators
Circuit-Switcher Position Indication . . . . . . . . . . . . . . . . 6
Understanding the Interrupter Indicators . . . . . . . . . . . . 7
Understanding the Gas-Pressure Gauge . . . . . . . . . . . 8
Understanding the Remote Gas-Density Indicator . . . 10
Switch Operation
Before Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Closing the Circuit-Switcher . . . . . . . . . . . . . . . . . . . . . 12
Opening the Circuit-Switcher . . . . . . . . . . . . . . . . . . . . 13
Opening the Circuit-Switcher Using the
Optional Manual Trip Device . . . . . . . . . . . . . . . . . . 15
Inspection Recommendations
Recommended Inspection Procedures . . . . . . . . . . . . 18
Using the Manual Operating Handle to Operate the
Disconnect During Inspection . . . . . . . . . . . . . . . . . 19
Coupling and Decoupling the Switch Operator for
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Inspecting the Operation of Circuit-Switcher Blades and
Blade Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Inspecting the CS-1A Switch Operator Motor Brake . . 26
Guidelines for Interrupter Resistance Values . . . . . . . 26
Summary of Contents for Mark VI
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