The Working Principle Of Air Pressure Switch

The Working Principle Of Air Pressure Switch

The Working Principle Of Air Pressure Switch

An air pressure switch, also known as an air pressure breaker, is often used in boilers, water heaters, and HVAC and is one of the circuit breakers. It is a switch that automatically disconnects when the current exceeds the rated current in the circuit. 

The Air pressure switch is an essential electrical appliance in a low voltage distribution network and power drive system. It combines control and multiple protection functions. 

In addition to the contact and breaking circuit, it can protect the circuit or electrical equipment in short circuits, severe overload, and under voltage. It can also be used too infrequently to start the motor. 

The overload current cannot make the electromagnetic trip action when the line is overloaded. Still, it can make the heating element produce a certain amount of heat, prompting the bimetallic strip heated to bend upwards, pushing the lever to separate the hook from the lock, and then breaking the primary contact, cutting off the power. 

When the line short-circuits or serious overload current, the short-circuit current exceeds the instantaneous tripping over setting current value, electromagnetic trip generates enough suction, pull the armature and hit the lever, so that the hook around a shaft seat up and separate from the lock. 

The lock-in reaction under the action of the spring will break the three pairs of the main connector, then cut off power. 

Unionwell manufactures various micro switches, pressure switches, etc., and has a one-stop R & D and production system. 

Click here for more information:

Share this post