Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications

A method of operating a temporary power delivery system comprising:

• receiving, by a first terminal of a circuit interrupting device, current from a power source;
• delivering, by a second terminal of the circuit interrupting device, current to a power cord;
• supplying, by the power cord, power to a load;
• and
• interrupting current flow from the power source to the power cord, by a circuit breaker of the circuit interrupting device, when a first voltage between a first phase conductor of the circuit interrupting device and a neutral conductor of the circuit interrupting device differs from a second voltage between a second phase conductor of the circuit interrupting device and the neutral conductor by more than a first threshold.

A power system comprising:

• a power source;
• a booth stringer;
• a circuit interrupting device including:
• a first terminal configured to receive power from the power source,
• a second terminal configured to deliver power to the booth stringer, and
• a first phase conductor, a second phase conductor, and a neutral conductor;
• a circuit breaker;
• and
• a protection circuit configured to open the circuit breaker when at least one of:
• a difference between a combined magnitude of current flowing through the first and second phase conductors and a magnitude of current flowing through the neutral conductor exceeds a first threshold, and
• a first voltage between the first phase conductor and the neutral conductor differs from a second voltage between the second phase conductor and the neutral conductor by more than a second threshold.