Abstract: A filter sensor to monitor an air filter in an air conditioning system is disclosed. The filter sensor includes a housing having an interior passage. The housing is located in relation to an air vent of the air conditioning system. A propeller is mounted in the interior passage. The propeller is rotated by the filtered air flow of the air conditioning system. A motion sensor is provided in proximity to the propeller or its shaft. A controller is coupled to the motion sensor to determine the rotational speed of the propeller and correlate the rotational speed of the propeller with the condition of the filter. An indicator is coupled to the controller to indicate a status of the air filter.

Abstract: A three-phase disconnect switch for a power distribution system that supplies three-phase power from a source through a main circuit breaker to multiple three-phase feeder circuits, includes three pairs of contacts adapted for connection to the three phase lines of a selected one of the feeder circuits for opening and closing each of the phase lines, and a movable actuator associated with the three pairs of contacts and responsive to a signal indicating the occurrence of an arcing fault in the selected feeder circuit for initially creating a short circuit across the three phase lines of the feeder circuit and then opening the contacts.

Abstract: A mechanical lug assembly for an electrical power device includes a spring clamp and a cradle. The spring clamp has a fixed section, a clamping section, and a deflecting section. The deflecting section has a deflecting spring force DF to allow flexible bending of the clamping section relative to the fixed section. The clamping section is offset relative to the fixed section. The cradle has a fastened section mounted to the fixed section to form a closed end of the lug assembly. The cradle has a terminal section extending from the fastened section along the clamping section to form an open end of the lug assembly. The cradle further has a pair of side walls extending at an angle from respective sides of the terminal section towards the spring clamp. The clamping section is fixed in place between the side walls.

Abstract: A filter sensor to monitor an air filter in an air conditioning system is disclosed. The filter sensor includes a housing having an interior passage. The housing is located in relation to an air vent of the air conditioning system. A propeller is mounted in the interior passage. The propeller is rotated by the filtered air flow of the air conditioning system. A motion sensor is provided in proximity to the propeller or its shaft. A controller is coupled to the motion sensor to determine the rotational speed of the propeller and correlate the rotational speed of the propeller with the condition of the filter. An indicator is coupled to the controller to indicate a status of the air filter.

Abstract: A mechanical lug assembly for an electrical power device includes a spring clamp and a cradle. The spring clamp has a fixed section, a clamping section, and a deflecting section. The deflecting section has a deflecting spring force DF to allow flexible bending of the clamping section relative to the fixed section. The clamping section is offset relative to the fixed section. The cradle has a fastened section mounted to the fixed section to form a closed end of the lug assembly. The cradle has a terminal section extending from the fastened section along the clamping section to form an open end of the lug assembly. The cradle further has a pair of side walls extending at an angle from respective sides of the terminal section towards the spring clamp. The clamping section is fixed in place between the side walls.

Abstract: A three-phase disconnect switch for a power distribution system that supplies three-phase power from a source through a main circuit breaker to multiple three-phase feeder circuits, includes three pairs of contacts adapted for connection to the three phase lines of a selected one of the feeder circuits for opening and closing each of the phase lines, and a movable actuator associated with the three pairs of contacts and responsive to a signal indicating the occurrence of an arcing fault in the selected feeder circuit for initially creating a short circuit across the three phase lines of the feeder circuit and then opening the contacts.

Abstract: The present invention provides a fuse holder as part of an integrated switch base assembly for attachment to a fusible switch having one or more phases between the line and load side of a circuit. The fusible switch has a switch base assembly for opening and closing a switch contact. The switch base assembly has a mounting surface. The fuse holder includes a generally planar base made of electrically-insulating material. The base has a top and bottom face. The top face has a plurality of upstanding walls integrally formed therewith which define a compartment corresponding to each phase. The bottom face has a contoured surface adapted to abut the mounting surface of the switch base assembly. A first and second fuse clip correspond to each phase and are secured on opposite ends of the top face within the compartment. A terminal connects to the load side of the circuit and electrically and mechanically connects to the first fuse clip. The fuse holder includes an elongated connector having two ends.