Air compressor cannot be started because of high voltage

Air compressors are used in various production fields. Due to the different quality of equipment, they will be reported for repair more or less. Common faults mainly include high-temperature shutdown, frequent loading and unloading, and failure to start when the voltage is too high. When the air compressor fails, many users often do not know how to deal with it. The following summarizes the countermeasures that the pressure of the screw air compressor is too high to start and the voltage is too low.

1, the voltage is too high to start

screw air compressor units are equipped with voltage protection devices, general equipment low-voltage automatic start, high-voltage automatic shutdown is a normal phenomenon. Pressure-related are automatically controlled by pressure switches or pressure sensors. Therefore, if the machine has a pressure problem, it is generally only necessary to adjust the pressure of the air compressor, adjust the action range of the pressure switch and the starting pressure set on the sensor. The pressure switch has a RANGE and DIFFE. Adjust range according to the production needs of the enterprise, diffe generally does not move. Adjust the start-stop pressure value set by the pressure sensor. The pressure setting selection can be found on the air compressor panel for adjustment.

2. The voltage is too low

this is a problem that many users are prone to, and the harm is often greater. If an enterprise uses a power frequency air compressor, the voltage can only be changed by adjusting the transformer. For example, if the power grid voltage is only 360V, then the transformer needs to be replaced from 380V to 220V. However, as the cost of replacing the transformer for the motor is often high, it is recommended to consult the manufacturer's motor whether it can afford it, and then decide on the subsequent method.

If it is frequency conversion air compressor solution is more. For variable frequency models, due to the internal circuit principle of the inverter: the inverter changes the output power by changing the output voltage, but this voltage cannot be higher than the input voltage. if,

the input voltage is only 360V, then a 380V rated voltage machine can only output to 360V, the voltage is not enough, the inverter will raise the current. In fact, as long as the current is not too large, it can also be used. If the current is too large, the upper limit frequency can also be reduced to ensure the normal operation of the machine.

Screw air compressor in the use of the process of failure is inevitable, only to master the basic fault handling methods to ensure the normal operation of the unit.