Functional Operation
9
5.7. Circuit Breaker Testing
WARNING
: Before connecting the RT3-100 to a circuit breaker, close the breaker and
ground one side of it.
For safety, it is important that one side of the power circuit breaker be grounded prior to
connecting the RT3-100 unit. Although the RT3-100 is protected against high static voltages,
it should not be used to discharge high voltages to ground.
If the circuit breaker under test has current transformers (CTs) associated with it, the meter
reading may take up to seven seconds to stabilize, due to the inductive transients induced by
the CTs. Because of transients, use the RT3-100 in Long mode when testing circuit breakers.