Safety requirements for electrical parts brake (B)

    1. A new brake with brake control switch, when the brakeoperation is abnormal, the switch will operate, elevator protectionstop staircase, which provides a guarantee for the safe and reliable operation of the brake. But without the requirements of relevant standards, hope reflected later in the standard, so that themaintenance and inspection.

    2.The other points of the electrical part of the brake is a brake coilcontrol circuit. According to the relevant provisions of the standardwill be summarized as follows:

Electromagnetic Clutches And Brakes

    (1).Normal operation, the brake should be maintained in continuousconduction under loose state.

    (2).Cut off the brake current application, at least two independentelectrical device to realize, regardless of the device and electricaldevice used to cut off the elevator drive current is one host.

   (3).Independent means two contactor without mutual control system,two contactors must separately by two independent signal control,cannot be controlled by a signal.

   (4).When the elevator is stopped, if the main contacts a contact is not open, the most late next time running direction change shouldprevent elevator running.

   (5).When the elevator motor generator power is likely to play a role,should prevent the motor to the electrical device fed electric brake.

   (6).Disconnect the brake release circuit 6, the elevator shall beeffective braking without additional delay. Brake response timeshould not exceed 0.5s, prevent elevator pour la, slippingphenomenon. Working brake for an ascending car overspeedprotection device of brake components, the response time of GB7588- 2003 shall comply with the requirements of article 9.10.1brake.

    (7).If the loop has a contact adhesion, another contacts of the contactor can still be reliable brake circuit disconnect, prevent the emergence of the staircase.

    (8).The is capable of monitoring the contactor is not open this fault,in order to prevent another contactor also not open caused the staircase.

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