Safety and Substation Maintenance
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This 22-minute DVD
covers safety precautions when working on substation equipment. Includes
an overview of substation components. Describes how to de-energize transformers,
switchgear, breakers, capacitor banks, and battery banks.
– 4 minutes
The role of substations in electricity distribution. An introduction
to basic substation components and the purpose of each. Components include:
Disconnects, transformers, switchgear, power factor improvement items,
control circuits and their battery backups. Also includes an overview
of the substation grounding system.
the Grounding System – 3 minutes
Discusses maintenance schedules for substation grounding systems. Covers
five safety considerations when approaching any job. Discusses precautions
to take when testing a substation grounding system. Demonstrates two
tests of grounding systems.
Equipment – 3 minutes
This section shows how to ground a piece of substation equipment after
transferring its load, isolating, and de-energizing it. How to test
for backfeed voltages, how to install grounds on a transformer, how
to tag isolated equipment.
- Tips on
Testing – 2 minutes
tips: Be sure you are working on the correct piece of equipment. Mark
the area of the substation that is de-energized and where test procedures
will take place. Ensure good communication with everyone working in
the area, including those not involved in the test. If it is too noisy
for auditory communication, be sure everyone understands hand signals
that might be given during the test.
Testing & Maintenance – 4 minutes
transformer components and the tests for each. Demonstrates these tests:
Turns ratio test, insulation resistance test, insulation power factor
test, oil analysis, gas analysis. Covers safety precautions to observe
during maintenance activities including: Vacuum drying insulation, repairing
tap changers, repairing connections, repairing insulators, changing
Maintenance – 3 minutes
Safety precautions to observe when working on substation circuit breakers,
metering equipment, protective relays, and control circuits.
Banks, Capacitor Banks, Security Systems – 3 minutes
Describes the proper clothing and tools when working on battery