Environmental conditions for use:

　　Ambient temperature: generally 0-45℃; with heating device: -20-45℃;

　　The altitude does not exceed 2000m; The relative humidity of the air is not more than 85% (temperature 25℃);

　　In places where there is no explosive mixture of gas;

　　where there is no significant shaking and shock vibration;

　　The installation inclination with the horizontal plane does not exceed 5°;

　　in an environment where there is no gas or steam that destroys the insulation;

　　A place where dripping water can be prevented indoors;

　　Air pollution level 3;

　　Working conditions:

　　Installation category (overvoltage category): SDQ-A series Ⅱ; SDQ-B series, SDQ-R series Ⅲ;

　　Use category: SDQ-A series AC-2; SDQ-B series, SDQR series AC-3;

　　Control power supply Us: AC 380V three-phase four-wire 50/60Hz (VV-1000 4*2.5mm2);

　　Allow starting resistance fluid temperature: 0-70℃;

　　Allowable starting resistance liquid level range: the highest liquid level is 8cm away from the upper edge of the water tank, and the lowest liquid level is 16cm away from the upper edge of the water tank;

　　Executive standards

　　low-voltage switchgear and control equipment GB/T14048.1-2006; IEC947-1: 1988; GB 7251.1-2005; IEC439-1: 1992 water resistance starter Q/XDY02-2007

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