Low to Medium Voltage Circuit Breaker Maintenance & Testing

Many industrial customers choose to perform general testing and maintenance on incoming utility substations and downstream substations within the plant perimeters. This class provides the information and hands-on training to test and maintain most of the major components of the substation except for the main transformer and protective relays.

Course Description: Many industrial customers choose to perform general testing and maintenance on incoming utility substations and downstream substations within the plant perimeters. This class provides the information and hands-on training to test and maintain most of the major components of the substation except for the main transformer and protective relays.

Prerequisites: Basic electrical training, some field experience and basic knowledge of switchgear.

Course Learning Objective:

• Theory, construction, and operation of common types of medium voltage metal-enclosed switchgear and circuit breakers, including air-magnetic and vacuum.
• How to interpret ratings and nameplate data and identify breaker ratings and vacuum
• Understand how medium-voltage circuit breakers operate, and know the primary causes of failure.
• Safety requirements when operating, racking, testing or maintaining circuit breakers
• Required testing and maintenance of medium-voltage metal enclosed circuit breakers and switchgear in accordance with ANSI/NETA MTS.
• Tests commonly performed on circuit breakers and their associated switchgear
• How to maintain batteries in accordance with ANSI/NETA MTS
• Ground testing theory and interpreting test results in accordance with ANSI/ NETA MTS

Hands-on Lab Session:

• Racking circuit breakers
• Perform and evaluate common circuit breaker electrical tests including insulation resistance, DC overpotential, contact resistance, insulation power factor and timing utilizing equipment from a variety of manufacturers.
• Perform routine maintenance on medium-voltage air and vacuum circuit breakers
• Perform clamp-on ground test and interpret the results
• Test and evaluate battery systems.