Overload current detection in a circuit interrupting device

A method for providing overload current detection in a circuit interrupting device, the method comprising:

• providing a hot conductor;
• providing a main contactor that is spring loaded but held in a closed switch position using a latch;
• providing a first electromagnetic device configured to instantaneously generate a magnetic force capable of unlatching the latch releasing a spring to open the main contactor removing power from an electrical circuit when overload current exceeds a predetermined % of a rated load current;
• providing a section of conductor that generates heat;
• providing a thermal overload current detection mechanism including a non-remote-controlled stationary temperature sensing switch having contacts, the temperature sensing switch located in close proximity to the section of conductor which closes the contacts when a temperature reaches a predefined temperature threshold corresponding to an overload current, in which case the temperature sensing switch electrically couples power to a second electromagnet which is disposed across the hot conductor and a connection to a neutral conductor,
• wherein the temperature sensing switch is based solely on a temperature characteristic of a soft magnetic material that loses its magnetic properties at a specific elevated temperature enabling the contacts of the temperature sensing switch to close, and
• wherein the energized second electromagnet generates a magnetic force capable of moving an armature that unlatches the latch releasing the spring to open the main contactor removing power from the electrical circuit.