CIRCUIT BREAKER MAINTENANCE, MEDIUM-VOLTAGE (AIR AND VACUUM)

3.5 days
2.8 CEUs
Hands-on
8:00am - 4:30pm, the final day ends at 12:00pm

Tuition USD $1425

Medium-voltage circuit breakers rated between 1 and 7.2 kV are usually assembled into metal-enclosed switchgear line ups for indoor use, or may be individual components installed outdoors in a substation. Air-break circuit breakers replaced oil-filled units for indoor applications, but are now being replaced by vacuum circuit breakers (up to about 35 kV). Medium voltage circuit breakers which operate in the range of 600 to 15,000 volts should be inspected and maintained annually or after every 2,000 operations, whichever comes first.

Learning Objectives
•Maintenance requirements and justification

•Identify components and ratings for metal-clad switchgear, specifically 5- and 15-kV air and vacuum circuit breakers

•Perform a complete circuit breaker service: inspection, removal, disassembly, cleaning, tightening, reassembly, lubrication and adjustment in lab

•Perform contact resistance, insulation resistance and operation tests and evaluate results in lab

•Understand the advantages of a breaker timing/travel test

Who Should Attend
Designed for apprentices, technicians, engineers, and supervisors that are responsible for the maintenance and testing of medium-voltage power circuit breakers.

Requirements
Requires working knowledge of basic electricity. Students must wear safety toe shoes.

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