的保护试验（Protection）

几个风扇扇叶连在一起固定限制其旋转，如果风扇及电子组件不会损坏，限制旋转的组件被解松则风扇可自动重新启动旋转。（All fans have integrated protection against locked rotor condition so that there will be no damage to winding or any electronic component. Restarting is automatic as soon as any constraint component to rotation has been released。）

风扇放置在垂直位置，打开开关“ON”或“OFF”风扇旋转或停止，运转正常则说明风扇是合格品（As fan placed at dead angle position, and the switch of FAN was changed from off to on，Restarting was automatic normal as soon as and proved that this fan is good fan）

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