1、离心风机允许全压启动或降压电动，但需要注意的是，全压启动时的电流约为额定电流的5-7倍。降压启动转矩与电压的平方成正比。当电网容量不足时。，应该从降压开始。
1. The centrifugal fan is allowed to be started at full voltage or electrically driven at reduced voltage, but it should be noted that the current during full voltage startup is about 5-7 times of the rated current. The starting torque for voltage reduction is proportional to the square of the voltage. When the power grid capacity is insufficient., It should start with reducing blood pressure.
2、离心风机在测试时，应仔细阅读产品说明书，检查接线方法是否与接线图一致；应仔细检查所供风机电源的工作电压是否符合要求，电源是否异相或同相，分电器元件容量是否符合要求。
2. When testing the centrifugal fan, carefully read the product manual and check whether the wiring method is consistent with the wiring diagram; It is necessary to carefully check whether the working voltage of the supplied fan power supply meets the requirements, whether the power supply is out of phase or in phase, and whether the capacity of the distributor components meets the requirements.
3.测试人数不少于两人。一个人控制电源。专人观察风扇运转情况，立即发现异常现象。首先检查旋转方向是否正确。离心风机开始运行后，检查各相运行电流是否正确。平衡，电流超过额定电流；如有异常，停止检查。运转五分钟后，检查风机是否异常，确认无异常现象后再开机。
3. The number of testers shall not be less than two. One person controls the power supply. Special personnel shall observe the operation of the fan and immediately discover any abnormal phenomena. Firstly, check if the rotation direction is correct. After the centrifugal fan starts to run, check whether the running current of each phase is correct. Balance, current exceeding rated current; If there are any abnormalities, stop the inspection. After running for five minutes, check if the fan is abnormal and restart after confirming that there are no abnormalities.
4、测试二速离心风机时，先低速启动，检查旋转方向是否正确。高速启动时，必须在风机静止后启动，防止高速反转，造成开关跳闸，损坏电机
4. When testing the two speed centrifugal fan, start it at low speed and check whether the rotation direction is correct. When starting at high speed, it is necessary to start after the fan is stationary to prevent high-speed reversal, which may cause the switch to trip and damage the motor
5、当离心风机达到正常转速时，应测量风机的输入电流。离心风机的工作电流不能超过其额定电流。如果工作电流超过其额定电流，请检查供电电压是否正常。
5. When the centrifugal fan reaches the normal speed, the input current of the fan shall be measured. The working current of centrifugal fan shall not exceed its rated current. If the working current exceeds its rated current, please check if the power supply voltage is normal.