Purpose and scope of use

CM1 series plastic case circuit breaker (hereinafter referred to as circuit breaker) is a circuit breaker developed by our company with manufacturing technology. Its rated insulation voltage is 800V. It is suitable for infrequent switching and motor starting in circuits with AC 50 Hz, rated working voltage 690V and below, rated working current 10A ~ 1250A (cm1-800 and cm1-1250 have no motor protection).

The circuit breaker has the functions of overload, short circuit and undervoltage protection, which can protect the circuit and power equipment from damage. This series circuit breaker has the characteristics of compact structure, small volume, high breaking height, short flashover and complete internal and external accessories.

Compliance standard: iec60947-1 and GB / t14048.1 general rules for low voltage switchgear and control equipment

Iec60947-2 and GB / t14048.2 low voltage circuit breakers for low voltage switchgear and controlgear

Iec60947-4 and GB / t14048.4 electromechanical circuit breakers and motor starters

Iec60947-5-1 and GB / t14048.5 electromechanical control circuit appliances

Normal working and installation conditions

The altitude of the installation site shall not exceed 2000m;

The ambient air temperature is - 5 ℃ ~ + 40 ℃, and the average value within 24 hours is no more than + 35 ℃;

The relative air humidity of the installation site shall not exceed 50% when the high temperature is + 40 ℃; there may be higher relative humidity under lower temperature, and the monthly average low temperature shall not exceed + 25 ℃; the monthly average higher relative humidity shall not exceed 90%, and the condensation on the product surface due to temperature change shall be considered;

The pollution level is grade 3;

The installation category of main circuit and under voltage release of circuit breaker is III, and the installation category of other auxiliary circuit and control circuit is II;

It can withstand the influence of humid air, salt fog, oil pollution, mold and nuclear industry environment;

Install in a place without explosion hazard, conductive dust, metal corrosion and insulation damage;

The installation site is free from rain and snow;

The circuit breaker has isolation function and the symbol is "".