Correct trial operation of roof fans

1. When the grid capacity of the roof fan is insufficient, the voltage reduction should be used to start. (When the power is greater than 11KW, it is advisable to use the step-down starting).

2. There should be no less than two people during the trial operation, one person controls the power supply, the other person observes the operation of the roof fan , and immediately stops the inspection if any abnormality is found; first, check whether the rotation direction is correct; during the fan process, check whether the operating current of each phase is balanced. , whether the current exceeds the rated current; if there is any abnormal phenomenon, stop the 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.

3. When the roof fan reaches the normal speed, check whether the input power of each phase of the fan is normal. The running current of the fan cannot exceed its rated current. If the running current exceeds its rated current, check whether the voltage supplied to the fan is normal.

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