Method and apparatus for converting a manual transfer switch int

Details Method and apparatus for converting a manual transfer switch int Method and apparatus for converting a manual transfer switch int

1999-05-26

2000-08-08

Fleming, Fritz

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307112, H02J 900

Patent

active

061006041

ABSTRACT:
An installed manual transfer switch is converted into an automatic transfer switch. A conversion assembly is mechanically mounted directly onto the already installed manual transfer switch. A controller is electrically coupled to the conversion assembly and automatically controls movements of the conversion assembly. The controller monitors the power supplies connected to the manual transfer switch and automatically moves the conversion assembly into different positions to change the switching arrangement of the manual transfer switch according to the monitored power supplies. The conversion assembly is mounted to the manual transfer switch without having to electrically disconnect the manual transfer switch from an electrical load center and without having to physically remove the manual transfer switch from an electrical panel box containing the manual transfer switch. To reduce the number of mechanical parts and to increase safety, a single motor operator is used to rotate a cam that controls all mechanical movement of the conversion assembly. To maintain substantially the same width of the panel box, the motor operator is designed to insert in between two circuit breakers in the manual transfer switch. The electrical panel door in the currently installed electrical panel box is replaced with a conversion door that holds the controller that plugs into the conversion assembly.

REFERENCES:
patent: 3778633 (1973-12-01), DeVisser et al.

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