Test apparatus for primary checking of protective relays

Details Test apparatus for primary checking of protective relays Test apparatus for primary checking of protective relays

H - Electricity

01

H

324/21

H01H 71/04 (2006.01) G01R 31/327 (2006.01)

Patent

CA 1088156

ABSTRACT OF THE DISCLOSURE A test apparatus for checking test objects, such as protective relays, especially voltage, current and/or frequency relays for the protection of a generator of a power supply network comprising a first circuit for generating and con- verting test signals or magnitudes to be delivered to the test objects and a second circuit for pre-programming the test signals or magnitudes to be delivered to the test objects. The first circuit comprises a first test signal generating circuit for supplying the voltage relay and the current relay with voltage and current test signals, respectively, and contains a first secondary winding of a test transformer. A static potentiometer is connected in parallel with this first secondary winding. The potentiometer supplies test signals in finely stepped or graduated values to the test objects. The first circuit further comprises a second test signal generating circuit for supplying the frequency relay with frequency test magnitudes. The second circuit embodies a test matrix composed of intersecting electrically conductive rails. The test matrix stores information concerning the test signals to be delivered to the relays. A signal and control device operatively connected with the test matrix and receiving therefrom the stored information concerning the test signals stores a pre- determined course of the test program and correspondingly con- trols the performance of the test.

272508

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