| 摘要 |
A portable circuit breaker tester (10) for testing a current transformer (30, 32, 34, 36) of a circuit breaker (18) having a first terminal (30e, 32e) on a first end of the transformer and a second terminal (138) on a second end of the transformer has a test port (14) configured to be coupled to the first (30e, 32e) and second terminals (138) and a test circuit (68, 74, 96, 104, 146) coupled to the test port (14). The test circuit (68, 74, 96, 104, 146) is configured to provide a test current through the test port (14) to the first terminal (30e, 32e), to monitor the second terminal (138) through the test port (14), and to provide an output signal to an indicia (38, 40) based on whether the test current is received at the second terminal (138). The test circuit (68, 74, 96, 104, 146) is configured to perform first and second testing operations on the circuit breaker (18) through the test port (14). During the first testing operation the test circuit (68, 74, 96, 104, 146) provides a test signal to a terminal (30e, 32e, 138) coupled to the current transformer and during the second testing operation the test circuit (68, 74, 96, 104, 146) provides power to the circuit breaker (18).
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