The Fault Module consists of a three-phase normally open contactor enclosed in a half-size EMS module. Each phase of the contactor can be used to insert different types of faults in an electric power circuit, such as ground faults and phase-to-phase faults. Control of the contactor is achieved using either a toggle switch or TTL control signals through a low-voltage control input. Both the toggle switch and control inputs are located on the module front panel. The Fault Module also includes a resistor used to limit the intensity of the current flowing in any inserted fault. Access to each phase of the contactor as well as to the resistor is achieved through safety banana jacks on the module front panel.