I. Purpose
The Substation Maintenance and Construction Manual (SMCM), “Circuit Breakers,” booklet provides information to substation maintenance employees about installing, maintaining, and safely handling all varieties of transmission and distribution power circuit breakers. It covers all Company substation circuit breakers, including those that are in service, in storage, or being received and
installed.
II.Safety
A. Manufacturer’s Instructions
1. Always use the manufacturer’s instructions for more detailed information,
including safety precautions, when performing any maintenance.
2. Most manufacturer’s instructions contain important safety information.
Not all of that information is listed in the SMCM.
3. Employees are responsible for understanding the maintenance and
safety requirements for each piece of equipment before beginning work.
B. Using Manual, Slow-Closing Devices
For circuit breakers equipped with manual, slow-closing devices:
1. Never use the slow-closing device to operate an energized circuit breaker.
These devices are designed strictly for operating a cleared, de-energized
circuit breaker for maintenance.
2. After making any mechanical adjustments and/or installing or re-assembling
any circuit-breaker components, slow-close the circuit breaker by hand
before attempting electrical operations.
3. Always refer to the manufacturer’s instructions for the proper procedure
for slow-closing a circuit breaker. Some manufacturers do not recommend
slow-closing specific types of circuit breaker
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