APPARATUS FOR TESTING AN ELECTROMECHANICAL RELAY

摘要

A portable apparatus for testing an electromechanical relay having Normally Closed (NC) contacts, Normally Open (NO) contacts, and an electromagnetic coil therein includes a housing, a battery, a battery test circuit, and a relay test circuit. The battery test circuit includes a first switch operable to provide a first type of indication based on a voltage output by the battery. The relay test circuit includes a second switch, and a third switch. The second switch is operable to provide a second type of indication if an electrical circuit of the relay test circuit is complete with the NC contacts of the relay. The third switch is operable to energize the electromagnetic coil and provide the second type of indication if NO contacts of the relay become closed upon energizing the electromagnetic coil, thus opening the NC contacts of the relay.

主权项

1. A portable apparatus for testing an electromechanical relay having Normally Closed (NC) contacts, Normally Open (NO) contacts, and an electromagnetic coil therein, the apparatus comprising:
a housing; a battery disposed within the housing, the battery having a first terminal and a second terminal disposed in selective communication with a battery test circuit and a relay test circuit, wherein the battery test circuit and the relay test circuit are parallelly arranged to one another, and wherein: the battery test circuit includes a first switch operable to provide a first type of indication based on a voltage output by the battery; and the relay test circuit includes:
a second switch operable to provide a second type of indication if an electrical circuit of the relay test circuit is complete with the NC contacts of the relay; anda third switch operable to energize the electromagnetic coil and provide the second type of indication if the NC contacts of the relay become open and the NO contacts of the relay become closed upon energizing the electromagnetic coil.