A landing-door switch circuit according to the present disclosure includes an upper-car safety circuit, an upper-car auxiliary circuit, a lower-car safety circuit, and a lower-car auxiliary circuit. The upper-car safety circuit and the lower-car safety circuit connect excitation coils of switching devices of a power supply for driving an upper car and a lower car, respectively, and a power supply, and include main circuits in which landing-door switches are connected in series, and first connection units and third connection units branched from the main circuits. The upper-car auxiliary circuit and the lower-car auxiliary circuit include a second connection unit and a fourth connection unit on the lower car and the upper car, respectively, to bypass the landing-door switches.
LANDING-DOOR SWITCH CIRCUIT
2024-06-20
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |
DOOR SWITCH INSPECTION DEVICE AND DETECTION METHOD FOR ABNORMAL STATE OF LANDING DOOR SWITCH
European Patent Office | 2018
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