• ETT Level 4.12: Circuit Breakers and Circuit Switchers

    Learn how to interpret recorded data acquired during circuit-breaker/circuit-switcher operation for determination of suitability for service.

    1. Analyze time travel - Interpret recorded data acquired during circuit-breaker/circuit-switcher operation for determination of suitability for service.
      • Circuit Breaker Timing Tests [PDF] By definition, a circuit breaker timing test is the process of measuring the mechanical operating times with the goal of verifying, analyzing, and validating the correct function of the circuit breaker. Timing tests are particularly important in maintaining the reliability of the transport and distribution network and also in ensuring the safety of the personnel employed to maintain and operate the network protection apparatus.
      • Time-Travel: It's Not Just Science Fiction [PDF] Time-travel analysis is the equivalent to a crystal ball that can look into both the past and the future. The trick is learning to read that crystal ball.
      • Medium-Voltage Circuit Breaker Timing-Test Evaluations [PDF] This paper presents a statistical evaluation of timing data to determine the acceptability of data measurement accuracy for evaluating wipe and gap adjustments

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