System, method and apparatus for power distribution in an electric mobile application using a combined breaker and relay

A breaker/relay, comprising

• a fixed contact electrically coupled to a motive power circuit for a mobile application;
• a movable contact selectively electrically coupled to the fixed contact, wherein the movable contact in a first position allows power to flow through the motive power circuit, and the movable contact in a second position does not allow power to flow through a motive power circuit;
• and
• a physical opening response portion responsive to a current value in the motive power circuit, wherein the physical opening response portion is configured to move the movable contact to the second position in response to the current value exceeding a threshold current value;
• a current source circuit electrically coupled to the breaker/relay and structured to inject a current across the fixed contact;
• and
• a voltage determination circuit electrically coupled to the breaker/relay and structured to determine at least one of an injected voltage amount and a contactor impedance value, wherein the voltage determination circuit comprises a high pass filter having a cutoff frequency selected in response to a frequency of the injected current.