DC circuit breaker operating conditions

. The altitude of the installation site does not exceed 2000m;

. The ambient air temperature is not higher than plus 40 degree and not lower than -5 degree ; and the 24-hour average value does not exceed plus 35 degree (except for special orders).

. The relative humidity of the air at the installation site. The maximum temperature is not more than 50 percent at plus 40 degree , and higher relative humidity is allowed at lower temperatures, for example, up to 90 percent at 2O degree . Special measures should be taken for the occasional condensation caused by dry temperature changes.

. There is no explosive dangerous medium in the air, and there is no place where there is no gas and conductive dust that can corrode metal and damage the insulation.

. A place free from rain and snow.

. The pollution level is level 3.

. Installation category: The installation category of the main circuit of the circuit breaker is Ⅲ, and the installation category of the auxiliary circuit and control circuit that is not connected to the main circuit is Ⅱ

. The circuit breaker should be installed and used according to the instruction manual of the product.