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What Are The Elevator Safety Switches?
- Jun 20, 2018 -

Safety circuit

Role: In order to ensure that the elevator can operate safely, many safety components are installed on the elevator. Only if each safety component is in normal condition, the elevator can run, otherwise the elevator will immediately stop running.

The so-called safety loop is to install a safety switch in all safety components of the elevator, connect all safety switches in series, and control a safety relay. Only when all the safety switches are switched on, the safety relay is pulled in and the elevator can be operated electrically.

l Common safety circuit switches include:

Room: Control panel emergency stop switch, phase sequence relay, thermal relay, speed limiter switch

Well: Upper limit switch, lower limit switch (some elevators put these two switches in the safety circuit, while others use these two switches to directly control the power supply)

Ground pit: broken rope protection switch, pit maintenance box emergency stop switch, buffer switch

Car: Control Box Emergency Stop Switch

Car top: safety window switch, safety gear switch, car top repair box emergency stop switch

Fault status: When the elevator is in the stop state, all signals cannot be registered, and the fast trains and slow cars cannot run. The first thing to suspect is a safety loop fault. The status of the safety relay should be observed in the room control panel. If the safety relay is released, it should be judged as a safety circuit failure.


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