What is the reason for the vacuum pump to trip automatically?

The vacuum pump motor is overloaded. The vacuum pump motor is overloaded. At this time, the current of the motor will definitely be too high. If the current is set to exceed the current set by the electric control box or the relay protector, the vacuum pump will trip by itself. At this time, the normal phenomenon of the vacuum pump, the upper limit of the adjustable high current protection. To solve the trip phenomenon. However, considering the magnitude of the rated current of the motor, and the actual current exceeds the rated current of the motor, then this method cannot be used. At this time, we must quickly find out the cause of the motor overload to solve the problem. For example, the super-current of the water ring vacuum pump should consider whether there is foreign matter entering the pump cavity, causing the motor to overload, and the working fluid flow rate will be too large, which can be adjusted accordingly. Whether the exhaust port is too high pressure, whether the exhaust pipe is blocked, whether it is too high or too thin. The rotary vane vacuum pump has no working fluid, and the above problems can be ignored. However, the rotary vane vacuum pump needs to be refueled. At this time, it is necessary to consider whether the vacuum pump oil in the pump chamber is emulsified or that foreign matter enters from the air inlet. In addition, the most important thing is to check the intake line for leaks, because the rotary vane vacuum pump adapts to the pumping system, and the use of the atmosphere can cause the motor to overload and trip. If it is a Roots vacuum pump or a vacuum unit, the problem is relatively simple and straightforward, because everyone knows that the Roots vacuum pump is a booster pump that cannot be used alone. It needs a foreline pump to be used. If the vacuum is not reached, the Roots pump starts. The rear motor will be overloaded and will trip immediately. Furthermore, it is the basic problem. For example, if there is any debris in the pipeline of the pumping system, the welding slag, the small particles enter the pump chamber, and then the vacuum pump oil, the Roots water ring vacuum unit does not follow the corresponding start-stop sequence or In the case of automatic power-off, the working fluid of the water ring pump will be returned to the Roots pump pump chamber under the influence of negative pressure, which will destroy the performance of the vacuum pump oil, which will cause the Roots pump to overload and trip beyond the rated current.