Contact on test switch

Details Contact on test switch Contact on test switch

G - Physics

01

R

324/21

G01R 31/00 (2006.01) G01R 31/327 (2006.01) H01R 29/00 (2006.01)

Patent

CA 1276981

8 ABSTRACT The present invention relates to a test system for a protective relay. The test system comprises a test switch (1) and a test- plug handle (2). The invention comprises supplementing the sys- tem with a contact function which is activated when the handle is inserted into the test switch so that, before the testing of the relays in the protective device is initiated, a signal function can be obtained to indicate that testing is in progress. The contact function is brought about by arranging, on the upper and/or lower side(s) of the test switch, two semi-protected, uninsulated and parallel contact pins/slide bars (4, 5) from the front edge to the rear edge of the test switch. At the rear edge contact parts to ordinary conductors are arranged in order to forward the contact function. The contact pins are mounted in a guide structure (10, 11) formed with an inner guide pro- file adapted to guide two resilient tongues (13, 14) on the test-plug handle. On the sides of the tongues facing the test switch, these tongues are each provided with a contact washer. The parts included cooperate in such a way that, once the test- plug handle has been inserted into the test switch, contact is achieved between the two contact pins on the upper and/or lower side(s) of the test switch.

585794

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