Patent ID: 11874327
Assignee: SONNEN GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A method for testing whether high voltage disconnect power relays are operable, comprising the steps of:
providing two high voltage lines arranged in parallel between two power sources to allow for bi-directional power flow between the two power sources;
providing two high voltage disconnect relays, each comprising contact terminals and magnetic coils, connected in series on each high voltage line;
providing a test line arranged between the two relays on each high voltage line;
providing a test circuit directly connected to the test lines that is electrically and galvanically isolated from the high voltage lines;
closing each high voltage disconnect relay individually in series, while setting the remaining high voltage disconnect relays to remain open;
operating the power source nearest to the closed high voltage disconnect relay;
observing the output of the test circuit; and
generating a digital report that indicates whether each high voltage disconnect relay is operable.