This IEEE Standards product is part of the C37 family on Switchgear, Substations and Protective Relays. As an aid in testing circuit breakers under conditions of switching capacitive currents syn-thetic 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 reignition or restriking. 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.