1.1              旋轉方向（Rotation Direction）

  從扇葉面看風扇，扇葉逆時針方向旋轉，按外框一邊的箭號指示相同方向（The blade is count Clockwise viewing from the blade. The same direction also indicated by an arrow mark on one side of the housing。）

1.2           保護試驗（Protection）

幾個風扇扇葉連在一起固定限制其旋轉，如果風扇及電子組件不會損壞，限制旋轉的組件被解松則風扇可自動重新啟動旋轉。（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。）

風扇放置在垂直位置，打開開關“ON”或“OFF”風扇旋轉或停止，運轉正常則說明風扇是合格品（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）

1.3              轉體鎖定保護（Locked Rotor Protection）

1.3.1        小電流或者帶Auto start功能的風扇，在通電旋轉狀態(tài)將風扇扇葉鎖定，持續(xù)72小時之后，松開被鎖定扇葉并斷開電源,再重新啟動電源，風扇自動重轉，證明風扇無異常。（No damage shall be found after 72 hours continuously at condition of rotation locked，Restarting is automatic as soon as constraint to running has been released）。

1.3.2        大電流或不帶Auto start功能的風扇，不可長時間鎖定，否則風扇會過熱損壞。（The fan can’t be locked or the fan will overheat and be damaged）

1.4              極性保護（Polarity Protection）

電壓正常條件下，如果反接電源對風扇通電5分鐘，斷電后重新按正常兩極連接，所有功能將正常（No damage shall be found with reverse connection 15 minute at rated voltage. After returning to normal polarity, all function shall be normal。）

1.5              自由跌落（Free Drop shock）

單體由600mm高空跌到30mm厚的木板上,風扇6個表面中的任何一面和一角均經(jīng)得起跌落試驗,并確認無損傷.(The product drops from the bight of 600mm to the wood board of 30mm. Any one of the 6 faces and any one of the corners could withstand the pressure, and also no damage will be found.)。電力測定（ELECTRICAL INSPECTION）

1.6              絕緣電阻（Insulation Resistance）

        在500V直流電條件下，外框與導線正極電阻不少于10MΩ（Not less than 10M ohm between housing and positive end of lead wire(red) at 500V DC）。

 6.2   絕緣強度（Dielectric Strength）

            在5mA漏電流，VA500C條件下持續(xù)60秒，風扇外框與導線無異常，證明絕緣良好（No damage should at 500 VAC for 60 sec, measured with 5mA trip current between housing and positive end of lead wire）。

 6.3  平均壽命（Life Expectancy）

            在指定恒溫下持續(xù)工作后，經(jīng)檢驗，90%能正常運轉即可估算其平均使用壽命（The continuous duty life at given temperature after which,90% of testing units shall still be running）。