Test device for circuit breakers having electronic trip units

Details Test device for circuit breakers having electronic trip units Test device for circuit breakers having electronic trip units

H - Electricity

02

H

324/21

H02H 3/04 (2006.01) G01R 31/32 (1990.01)

Patent

CA 1293022

ABSTRACT OF THE DISCLOSURE The invention is directed to a portable test device for an electronic trip unit which is electrically powered from the internal power supply of the trip unit being tested. The test unit utilizes three leads connected to the trip unit. One of the leads connects to the voltage source for the trip unit and another lead connects to the ground potential to acquire power from the test unit. The voltage is selectively adjusted within the test unit by resistors and a potentiometer to vary the input voltage which is to be carried by the third lead into the trip unit.

593164

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