QDS1 series mining general automatic switchDetailed product description：

Scope of application and working conditions:

The QDS1 series mining general automatic switch is suitable for traction electric locomotives used in general metal mines or coal mines without explosion hazards. It is used as the main power switch and overcurrent protection for the motor owner's circuit.

Work environment:
1. Altitude not exceeding 1200m;
2. The ambient temperature ranges from -20 ℃ to+40 ℃;
3. The average maximum relative humidity in the wettest month shall not exceed 90%;
4. Within protective devices that prevent flooding, splashing, and moisture;
5. In coal mine main tunnels where there is no explosion hazard, and there is no gas or conductive dust in the air that can corrode metals and damage insulation, and there is no methane or coal dust explosion hazard;
6. The inclination relative to the normal position is not greater than 10 degrees;
7. Compared to the longitudinal direction of the locomotive, it has an impact with an acceleration of no more than 30m/s2. The vertical, lateral, and longitudinal directions of the locomotive have sinusoidal vibrations with a frequency f of 2-50Hz, and the amplitude is not greater than A

2≤f≤10Hz	A=25/f(mm)
10≤f≤50Hz	A=250/ftwo(mm)

QDS1 series mining general automatic switch technical parameters:

model	QDS1-140/250 (Old model QDS1-1S)	QDS1-70/250 (old model QDS1-2S)	QDS1-240/550 (Old model QDS1-3S)
Rated voltage DC V	two hundred and fifty	two hundred and fifty	five hundred and fifty
Rated current A	one hundred and forty	seventy	two hundred and forty
Set current A	one hundred and eighty-five	one hundred	three hundred and eighty
Weight (Kg)	twelve	twelve	twelve
Dimensions (length X width X height mm)	360X256X148	360X256X148	360X256X146