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Analysis of common faults of roots blower and tripping and power-off faults of roots blower

Source: Roots blower manufacturer Published on: December 21, 2021 Hits:

I believe everyone knows that aeration roots blower is widely used in the sewage industry, aeration, transportation and other industries. The type selection capacity of the aeration roots blower and the size of the frequency converter or the gap may be the reasons for the tripping and power-off of the aeration roots blower. Since there are many reasons for the power-off of the roots blower, how to deal with it and which method is suitable for the corresponding fault situation

If Roots blower is not started with no load, it will trip or suffocate. When starting, remember that Roots blower is started with no load. In case of ordinary tripping, the Roots blower will simply trip, which will not damage the Roots blower. At this time, what should be done is to open the vent valve, start the fan, and check the operation of the fan. The motor is burnt out. If the motor is burnt out and the Roots blower cannot be started, then we need to replace the motor, and the loss is relatively serious. Roots blower cannot hold the pressure, which is very easy to cause motor damage, and the bearing pressure of the blower will rise sharply, which will lead to a very serious situation.

If one circuit of the rectifier template of the aeration roots blower frequency converter fails, it will cause over-current protection power-off tripping. Do not make too much dust inside the inverter of the aeration roots blower or the radiator, resulting in poor heat dissipation, then the roots blower will be powered off and tripped. If the internal clearance of Roots blower rotor, cavity, etc. becomes smaller due to long-term rust and dust, the resistance will increase, which will lead to overload and power off protection.

The capacity of the frequency converter is not accurate in the selection process, and the parameters are slightly small. Therefore, the frequency converter selection of the aeration roots blower must exceed the rated power of the motor by about 20%. In this way, the power failure and tripping of the aeration roots blower will be avoided when the load is slightly high.

The unstable voltage is also one of the reasons for the protective power-off tripping of the aeration roots blower frequency converter. If the voltage is too low and lower than 360 V, the overcurrent protection of aeration roots blower will be cut off and tripped; otherwise, if the voltage exceeds 410 V, the converter will be overheated inside and cut off and tripped. In the same way, when the voltage fluctuates violently due to the startup of large equipment in the surrounding power grid in the application scenario of Roots blower, the power failure protection of the blower will also trip.

1. Precautions for startup

If Roots blower is not started with no load, it will trip or suffocate. When starting, remember that Roots blower is started with no load.

2. Simple tripping

In case of simple tripping of Roots blower, it will not cause damage to Roots blower. At this time, what should be done is to open the vent valve, start the blower, and check the operating condition of the blower.

3. The motor is burnt out

If the motor is burned out and the Roots blower cannot be started, then we need to replace the motor, with serious losses. Roots blower cannot hold the pressure, which is very easy to cause motor damage, and the bearing pressure of the blower will rise sharply, which will lead to a very serious situation.

I believe that after reading the above contents, you should also understand the analysis of Roots blower tripping and power-off fault. I hope it will be helpful to you.

Text label: Roots blower

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