Taizhou fuji elevator ~ there is always a spark when the relay contact is loosened ~ ~ it is useless to change the arc extinguisher ~ ~ what is the situation?

When the elevator is running, the braking voltage is kept at the voltage value V 1 when it is just opened. It should be that after the brake is opened, the braking voltage drops to the working voltage V2 that can keep the brake open within one or two seconds. At this time, if the power is cut off, the braking voltage will not change from the previous V 1 to 0, but from V2 to 0, so an adjustable resistor, contactor and step-down device can be installed to match the system circuit. Or, there are online shopping accessories, elevator-specific, and adjustable controller for braking power supply. Just choose the specifications and models, which is less than the fixed telephone 1/3.