Patent ID: 8461856

Claim:
An interface test device for testing a circuit, the interface test device comprising: a module configured to open and close a medium to high voltage monitoring circuit, the module having at least one pair of contacts biased towards each other that are electrically connected and in line with the medium to high voltage monitoring circuit, and a detector; and a test circuit, wherein the test circuit is connected to the medium to high voltage monitoring circuit before or substantially simultaneously with the medium to high voltage monitoring circuit being opened; wherein the module is configured to provide at least one output based upon at least one parameter of the medium to high voltage monitoring circuit to the test circuit in order to measure the at least one parameter by an external tester connected to the test circuit; and wherein the detector determines whether the at least one pair of contacts are in conductive contact with each other and provides a detector output indicating whether the at least one pair of contacts are in conductive contact with each other such that when the at least one pair of contacts changes from being in conductive contact with each other to not being in conductive contact with each other or changes from not being in conductive contact with each other to being in conductive contact with each other the detector changes the detector output.