CIRCUIT BREAKER MAINTENANCE, MOLDED- AND INSULATED-CASE

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

Tuition USD $755

Molded case circuit breakers (MCCBs) are assembled as an integral unit in a supportive and enclosing housing of insulating material. MCCBs have factory calibrated and sealed elements. An insulated case circuit breaker is is simply a MCCB with a stored energy mechanism. Effective maintenance of these circuit breakers demands careful attention to minor details combined with a thorough testing program. Basic maintenance procedures plus proper electrical tests are essential to maximize reliability.

Learning Objectives
•Identify components and nameplate data for circuit breakers equipped with thermal, magnetic and solid-state trip devices

•Applicable safety and NEMA standards

•Discuss and perform maintenance as required by manufacturer and industry standards

•Readand interpret time overcurrent curves, including thermal and solid-state types

•Perform primary current injection, contact resistance and insulation resistance testing in lab

•Evaluate test results

Who Should Attend
Designed for technicians, engineers, and supervisors that are responsible for the maintenance and testing of molded- and insulated-case circuit breakers.

Requirements
Requires working knowledge of basic electricity.

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