Pressure switch wiring and characteristics
Pressure switch, a relatively simple pressure control device, when the measured pressure exceeds the rated value, the free end of the elastic element will be displaced, directly or through a comparison to push the switching element to change the state of the switching element, and To control the measured pressure. Many people want to know the pressure switch wiring method, the pressure switch wiring diagram will be presented in detail below for everyone.
The electrical contact pressure gauge switch can set the maximum pressure protection through the meter head. If the four lines of the pressure switch are generally a pair of normally open points and a pair of normally closed points, some normally open and normally closed can be set to high or low For pressure conversion, it depends on whether there is such a function in the manual. If not, the normally closed contact is generally used to drive a relay or contactor to control the pump motor.
You can refer to this picture, connect the normally closed point of the pressure switch in series with the coil control circuit of the relay KM, the contact of KM controls the start and stop of the pump motor, so that when the pressure reaches the set value you need, the pressure switch will Action, normally closed will become normally open, disconnect the power supply of KM, so that the pump stops, generally this switching action will have a certain hysteresis characteristic, to avoid repeated start and stop of the pump at a certain pressure point, For example, if you set it to 8 kg for shutdown, the pump will start at 5 kg.
Common sense introduction: The pressure switch is a device combined with an electrical switch. When the preset fluid pressure is reached, the switch contact acts. It is mainly used to output alarm or control signals on industrial equipment such as power plants, petrochemicals, and metallurgy industries. It has important uses in the industrial field. It can prevent damage to important devices in production engineering and avoid major production accidents. So the pressure switch you choose must be reliable.
In addition, the motor must be equipped with overheat protection and air switch.
Pressure switch features
The main categories of pressure switches include normally open and normally closed. The main features are:
1. Adopt the inch pipe thread quick joint or copper pipe welding type installation structure, flexible installation, easy to use, no special installation and fixing.
2. Plug-in wire connection is available for users to choose.
3. The sealed stainless steel sensor is safe and reliable.
4. Within the pressure range, it can be manufactured according to the pressure value arbitrarily selected by the user.
The pressure switch is a device combined with an electrical switch. When the preset fluid pressure is reached, the switch contact acts. It is mainly used to output alarm or control signals on industrial equipment such as power plants, petrochemicals, and metallurgy industries. It has important uses in the industrial field. It can prevent damage to important devices in production engineering and avoid major production accidents.