Patent Number: 6,297,640

Title: Transfer switch position sensing using coil control contacts

Abstract: A method and apparatus for determining the position of the main contacts of an automatic transfer switch, without need for special position contacts, by monitoring for the presence of voltages at the normal source voltage contacts, the alternate source voltage contacts, the normal source coil control voltage contacts and the alternate source coil control voltage contacts of the automatic transfer switch, and providing an indication of switch position in response thereto.

Inventors: Hayes; John (Blairstown, NJ)

Assignee: ASCO Power Technologies, L.P.

International Classification: H01H 47/22 (20060101); H01H 47/00 (20060101); G01R 031/02 ()

Expiration Date: 10/02/2018