Switch systems for controlling conduction of multi-phase current

A switching system comprising:

• a switching assembly for controlling conduction of current from a power source to a first load along three power cables that convey different phases of the current, the switching assembly including three switch cells, each of the switch cells conductively coupled to a different one of the three power cables, the switch cells each including first and second solid state switching devices having respective diodes, the diode of the first solid state switching device conductively coupled in an opposite direction to the diode of the second solid state switching device;
• and
• a transformer having a primary winding and three secondary windings, the secondary windings each conductively coupled to a different one of the switch cells, the primary winding conductively coupled to a switch controller via a first power cable of the three power cables, the transformer configured to receive an activation control signal from the switch controller at the primary winding via the first power cable and convey the activation control signal to the switch cells via the secondary windings;
• wherein the switch cells are configured to activate and conduct the different phases of the current from the power source to the first load along the three power cables responsive to receiving the activation control signal from the switch controller.