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

Claim 0:
1. A system for testing whether high voltage disconnect power relays are operable, comprising:
two high voltage lines arranged in parallel between two power sources to allow for bi-directional current flow between the two power sources;
two high voltage disconnect relays, each comprising contact terminals and magnetic coils, connected in series on each high voltage line;
a controller for operating the high voltage disconnect relays;
a test line arranged between the two relays on each high voltage line;
a voltage drop circuit system coupled to the test lines to reduce the voltage from the level of high voltage power lines to a level that is safe for humans to touch and safe for low voltage electronic circuits and integrated semiconductors; and
a test circuit directly connected to the test lines that is electrically and galvanically isolated from the high voltage lines.