Tested and redundant elevator emergency terminal stopping...

Details Tested and redundant elevator emergency terminal stopping... Tested and redundant elevator emergency terminal stopping...

B - Operations, Transporting

66

B

B66B 5/06 (2006.01) B66B 5/10 (2006.01)

Patent

CA 2121326

Abstract Tested and Redundant Elevator Emergency Terminal Stopping Capability The main relay that controls power to an elevator motor and brake lift coil is dropped by an electronic emergency stop relay contact placed in series with the elevator safety chain in the event that the speed and position indications in the elevator controller do not agree with the indications of the emergency terminal stopping speed and zone relays, or if the elevator controller indicates the elevator is going too fast when within the emergency terminal stopping zone. Various parts of the safety chain are cycled off when the elevator is at a landing in order to check the safety circuits and main power relays.

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