This device connects a special water resistor in series in the rotor circuit of a wound motor, and uses a mechanical transmission device to uniformly change the distance between the two pole plates in the resistor liquid, so that the resistance value is steplessly reduced from large to zero, so that the motor Accelerate uniformly, start smoothly to the rated speed, and finally cut off to complete the starting process.

　　SDQ-A series water resistance starting cabinet is connected in series in the motor's rotor circuit, and the rotor resistance is changed to start. After the rotor circuit increases the appropriate resistance value, on the one hand, the starting current is reduced, which can be controlled below 1.2Ie. On the other hand, the water resistance in the rotor circuit can increase the starting torque, improve the motor's dragging ability, thereby shorten the starting time and reduce the heating of the motor.

　　The starting current of this device is small (Iq≤1.5Ie), the starting success rate is high, the starting is stable, there is no impact, the operation is reliable, the operation is convenient, and the space is small.

　　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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