The invention discloses an elevator electric brake-releasing circuit which comprises a UPS. A power supply relay with a normally-closed contact is connected with the UPS, the power supply relay is connected with a brake-releasing switch and a brake-releasing button in sequence, and the tail end of the brake-releasing circuit is connected to connection terminals of an elevator contracting brake. The elevator electric brake-releasing circuit is characterized in that multiple hoistway door lock switches are connected between the brake-releasing button and the connection terminal in series. According to the elevator electric brake-releasing device, the hoistway door lock parts are additionally arranged in the electric brake-releasing circuit, unpredictable accidents caused by opening a landing door when emergency rescues are conducted are fully considered, on the basis of not increasing the cost basically, the personal safety of passengers is guaranteed, therefore, the electric brake-releasing circuit improves the safety of a system and is suitable for application and popularization.


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    Title :

    Elevator electric brake-releasing circuit


    Contributors:
    ZHANG JING (author) / YIN XIANG (author)

    Publication date :

    2015-10-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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