The process of installing and debugging the motor energy-saving EC fan

　　The motor energy-saving EC fan is a very important kind of machinery. It is mainly responsible for the heat dissipation of the motor in the machinery, because the motor in the machinery will generate a lot of heat when it runs at high speed. If it is not discharged in time, it will cause damage to the motor and even the entire machinery. damage. So how to debug the motor energy-saving EC fan before and after installation?

　　Fan debugging

　　1. The fan allows full-voltage starting or reduced-voltage starting, but it should be noted that the current during full-voltage starting is about 5-7 times the rated current, and the reduced-voltage starting torque is proportional to the square of the voltage. When the grid capacity is insufficient , should be started with reduced voltage. (When the power is greater than 11kw, the step-down start is used)

　　2. During the test run of the fan, you should read the product manual carefully, and check whether the wiring method is consistent with the wiring diagram. For the cooling fan of the g series variable frequency motor, you should carefully check whether the working voltage of the power supply to the fan meets the requirements, and whether the power supply is phase-missing or the same. Phase, whether the capacity of the distributed electrical components meets the requirements.

　　3. There are no less than two people during the test run. One person controls the power supply, and the other person observes the operation of the fan. The frequency conversion motor fan is customized. If any abnormality is found, immediately stop the inspection. First, check whether the rotation direction is correct. After the fan starts to run, all phases should be checked immediately. Check whether the running current is balanced and whether the current exceeds the rated current. If there is any abnormal phenomenon, it should be stopped for inspection. After running for five minutes, stop the fan to check whether there is any abnormal phenomenon, and then start the operation after confirming that there is no abnormal phenomenon.

　　4. When the two-speed fan is tested, start the low speed first and check whether the rotation direction is correct. When starting the high-speed fan, it must wait for the fan to stop before starting. The variable-frequency motor saves energy on the EC fan to prevent the high-speed reverse rotation, causing the switch to trip and the motor. damaged.

　　5. When the fan reaches the normal speed, it should be measured whether the input current of the fan is normal, and the running current of the fan should not exceed its rated current. If the operating current exceeds its rated current, check whether the supplied voltage is normal.

　　6. The motor power required by the fan refers to the centrifugal fan and fan box under certain working conditions, when the air inlet is fully opened, the required power is large. There is a risk of damage to the motor if the air inlet is fully opened for operation. When the fan is commissioned - close the valve on the fan inlet or outlet pipeline, and gradually open the valve after operation until the required working condition is reached, and pay attention to whether the fan's operating current exceeds the rated current.

　　The difference between explosion-proof fans and non-explosion-proof fans (ordinary fans)

　　1. Different motors are used, explosion-proof fans must use explosion-proof motors;

　　2. There are requirements for the material of the impeller and the material of the internal position of the casing corresponding to the impeller;

　　3. Explosion-proof fans have lower limit requirements for the gap between the impeller and the casing, while ordinary fans often have upper limit requirements for the gap in order to pursue efficiency, which are contradictory to each other;

　　4. Explosion-proof fans have stricter requirements for safety protection at the inlet and outlet.

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