Westinghouse 1278C67G01 portable test kit for field testing and calibration of all plug-incards and output relays. The only power source required is a 120V convenience outlet.

A selector switch allows the operator to test individual cards or to simulate ATS operation by having the source monitoring cards drive the time delay cards which in turn drive the output relays, exactly as in actual use. Calibration checks or changes can thus be accomplished without necessity of energizing the alternate power source.