As an aid in testing circuit breakers under conditions of switching capacitive currents synthetic test circuits may be used. The design of the circuit should simulate the stress of actual service conditions as closely as possible. A number of circuits are given as examples. The limitation of the use of synthetic test methods is that the breaker under test must not display evidence of re-ignition or re-striking. The known circuits do not properly represent the interaction between the source and the capacitive load under this condition. Such breakers must be tested using direct circuits.

Develop a Guide to be used when conducting capacitive current switching. This will cover requirements, test circuits, test parameters, test procedures, etc. when using synthetic circuits.

This is a project that previously authorized P1492. The purpose was to develop a document to aid the user, manufacturer and testing laboratory in conducting capacitive switching tests.