Patent ID: 7167348

Claim:
A miniaturized modular programmable motor overload protector for low voltage and three phase AC induction motors comprising: a combination of coupled modular components including: a base housing portion having means for modularly coupling and mounting said base housing portion to a supporting substate; a Switch Mode Power Supply (SMPS) circuit portion integrated in the base portion housing; a Control Power (CP) input terminal portion integrated with the SMPS circuit portion; a Current Transformer (CT) circuit portion integrated in a CT housing portion in electrical interface with the SMPS circuit portion and the CT housing portion being modularly coupled with base housing portion; a phase current feed input terminal portion integrated with the CT circuit portion; a Signal Processor (SP) portion integrated in a SP housing portion, which is modularly coupled with the CT housing portion; and a removable user interface circuit assembly including a cover and base to house the user interface circuit assembly, the cover and base being modularly coupled to form the housing, and the base being modularly coupled with the SP housing, wherein a footprint of the combination of coupled modular components comprising said miniaturized programmable motor overload protector has mechanical dimensions of no greater than about 2.2 inches by 5.2 inches and wherein a total height of said miniaturized programmable motor overload protector is no greater than about 4.8 inches.