ST Switch
SecuControl inc. (SecuControl)
The ST Switch is a test block for interfacing substation devices (protection relays, fault recorders, revenue meters, etc.) to the voltage and current transformers and to other equipment on the system side of a power grid. The ST Switch uses disconnect pins to isolate the substation devices from the system side equipment. Once isolated, secondary injection can be performed using banana jacks on the front side of the test block.