Electrical door interlock system and method

Details Electrical door interlock system and method Electrical door interlock system and method

H - Electricity

02

B

348/12

H02B 13/025 (2006.01) H02B 11/133 (2006.01)

Patent

CA 2026985

2026985 9009691 PCTABS00001 A door interlock system and method are disclosed which are suitable for use for permitting electrical energization of power to components within an enclosure (11). If the door is opened, the components are de-energized. The system and method use a supply circuit breaker (5) external of the enclosure (11), and an enclosure circuit breaker (27) within the enclosure. A door sensing circuit (31) comprising an intrinsically safe barrier device senses a door of the enclosure (11) closed by door switch means (33). If the door is opened the door sensing circuit (31) opens a pilot circuit (25) which interrupt pilot circuit current and causes a pilot relay (21) to operate to trip-out the supply circuit breaker (5) thus, de-energizing the enclosure (11). A relay circuit (29) is interconnected with the pilot circuit (25), intrinsically safe barrier device (31) and the enclosure circuit breaker (27) to trip-out the supply circuit breaker (5) or enclosure circuit breaker (27) in response to sensing other electrical faults.

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