0 After the 55kw fan runs for a period of time, the switch trips, what is the reason 5

After the fan runs for a period of time, the reasons and solutions for the switch tripping:

1. The fan leakage causes the switch to trip automatically. Check whether the ground wire of the fan is in good condition;

2. The fan is turned on, resulting in a total load.

Overload, exceeding the total power. When turning on the fan, disconnect other electrical appliances;

3. The internal circuit of the fan is short-circuited. Professional maintenance points inspect the internal circuits of the fan and solve the short circuit points.

4.The circuit is undervoltage. The electricity needs to be replaced.

Extension of knowledge points:

The main structural components of the fan are impeller, casing, air inlet, bracket, motor, pulley, coupling, silencer, transmission parts (bearings), etc.

First of all, see if you are using a leakage switch, if so, it may be a leakage of the motor or a leakage switch quality problem, you only need to use the test test to test the motor, and the leakage will be on. Otherwise, it may be a leakage switch problem, just replace it. In addition, the current of the single-phase motor is about, and the current can be measured with a clamp meter, and there is no overload problem in the general fan motor.

Supplement: The situation you add may be caused by the poor quality of the empty opening, don't believe too much in the new product, and use a big brand.

In this case, most of them are due to a partial short circuit in the motor coil, or the bearing of the fan is too tight, resulting in overload tripping.

If there is leakage, the grounding wire must be connected, and it is also possible that the fan will trip if it is heated and short-circuited.

What kind of fan is it? Low-noise rotary or roots blower? The fan starts to run and trips, look at the fan motor, and see if the fan running current is too large?

1. The dust collector pipeline is relatively short, and the valve is closed (it is actually a butterfly valve, which cannot be closed), but the insufficient system resistance of the produced Shen Chansheng causes the centrifugal fan motor to trip; 2. Because the pipeline is too long, the valve is not closed, but the resistance is still higher than the resistance that the fan can bear, so it trips; 3. The reason for the electrical appliance is that the fan trips due to wide dust gripping; 4. The fan trips due to mechanical reasons; 5. If the fan damper is not fully opened, it will cause tripping; 6. The cross-section of the air duct at the outlet of the fire smoke exhaust fan is too large, resulting in the shaft power required by the fan being too high, the motor load being overloaded, and the current exceeding the rated value; 7. The reason for the low resistance of the dust collector and the skin liquid pipeline.

The first start trip every day, and then it doesn't jump when it starts, and the next day it looks like this.

The trip indicates that there is a fault, mainly because the current is too high, but also because the voltage is too high.

The main reasons for excessive current are: 1. The load is too large, that is, it is overloaded; 2. Mechanical problems, including loose base bolts, abnormal bearings (balls, rollers shattered, lubricating grease denatured); 3. Electrical problems, including short circuit, decrease in insulation resistance between phases or to ground, short circuit between turns, ground leakage, etc. Note:

If the sealing performance of the enclosure is reduced, it can also lead to a decrease in insulation or even a short circuit.

If the voltage is too high, it mainly occurs when the capacitor is compensated separately, and the capacitor capacity is too large. In other cases, the voltage is generally not excessive.

The starting current of the motor is large, and the switch in the starting cabinet is small, resulting in a large tripping of current.