Switching accessory for use with motor starters

Details Switching accessory for use with motor starters Switching accessory for use with motor starters

1994-09-12

1996-06-25

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Multiple contact type

200 5027, H01H 6702

Patent

active

055304141

ABSTRACT:
A switching accessory is provided for use with motor starters. In a first embodiment the accessory may be utilized as a motor starter by-pass. In another embodiment the accessory may be utilized as a motor starter isolator. The switching accessory utilizes lever action and fulcrum points to open and close contacts as desired. More particularly, the switching accessory includes a pull bar contactor arrangement, an actuator mechanism, a fulcrum shaft and an operator lever. The pull bar contactor arrangement may be axially displaceable between pairs of bus bars to permit electrical connections between the bus bars of each pair. The pull bar may be movable between a first position in which the contacts of the bus bars of each pair are isolated from one another and a second position in which the contacts of the bus bars of each pair are in electrical contact via contact elements on the pull bar. The actuator mechanism may be motor driven for linearly displacing an actuator member between predetermined limit positions. The fulcrum shaft is axially displaceable between two predetermined limit positions. The operating lever is pivotally connected to the pull bar, the actuator member of the actuator mechanism and the fulcrum shaft. The arrangement of the pull bar, the actuator mechanism, the fulcrum shaft and the operating lever may be such that, with predetermined biasing forces of biasing means acting on the fulcrum shaft and the pull bar, the operation of the actuator mechanism creates the desired electrical connection through a series of movements of the components of the accessory.

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Brochure, "Redistart.TM. Solid State Reduced Voltage Starter," Benshaw, Inc.

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