Bulk Power System stability relies on the effective operation of transmission and distribution substation components, especially circuit breakers. Because substation circuit breakers are critical in making and breaking circuits to supply power and protect systems, they must be tested periodically to determine if operations work as they should. Of all the field tests available, the most used is the time-travel test.

The Circuit Breaker Time-Travel Characteristics and Testing training course identifies the purpose and principles of circuit breaker time-travel testing. It explains the processes associated with conducting the three types of time-travel testing. This online course covers:

• Time travel testing purpose and principles
• Circuit breaker time and travel characteristics
• Circuit breaker time-travel test equipment
• Drop-bar recorder testing
• Light-beam recorder testing
• Digital timer/analyzer testing

Circuit Breaker Time-Travel Characteristics and Testing is part of the Switchgear Maintenance training series.