Westinghouse Electric Corporation

Eaton Corporation

Christopher G Walker

James I Wise

Trip profiles for electrical switches such as circuit breakers and overload relays can be generated, and when appropriate, coordinated, in a remote processor such as a personal computer. The profiles, with the addresses of the associated electrical switches are transferred into non-volatile memory in a portable unit. This portable unit is transported to the site of the electrical switches where it is interfaced with the appropriate electrical switch for loading of the assigned profile into the switch. In addition, the profiles stored in the electrical switches can be loaded into the portable unit for transport back to the remote unit for verification and/or modification.

Method and apparatus for setting trip profiles in electrical switches

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.

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Coraopolis, PA, United States of America

Christopher G Walker