Resistor is fit for ac 50 hz, rated voltage 660 v to 440 v or dc rated voltage of the circuit, the main motor starting, speed and braking action, resistor is open, its rated heating power is 4.6 kW, composed of iron chromium aluminum corrugated resistance element.

Working conditions and installation conditions:

The altitude is no more than 2500m.

2. The surrounding medium temperature shall not exceed + 40 ℃ and not less than 30 ℃.

3. When + 20 ℃ + 5 ℃ air relative humidity is not greater than 85%.

The surrounding medium is not enough to corrode metal and damage insulation and explosive dangerous gases and conductive dust.

There must be anti-rain and snow equipment and areas that will not be filled with water vapor.

In a region where there is no violent shaking or heavy shaking.