Scope of Application

CBRM5 Series Moulded Case Circuit Breaker (hereinafter referred to as "Circuit Breaker") with rated insulation voltage of 1000V is suitable for infrequent switching and infrequent starting of motor in circuits with frequency of 50Hz AC, rated working voltage of 415V and rated working current of 800A. The circuit breaker has the functions of overload, short circuit and undervoltage protection, which can protect the circuit and power supply equipment from damage.

Circuit breaker can be installed vertically (i.e. vertically) or horizontally (i.e. transversely).

Circuit breaker has isolation function, and their corresponding symbols are: -*-- 

Circuit breaker products shall comply with the following standards:

IEC60947-1 and GB/T14048.1 General

IEC60947-2 and GB/T14048.2 Low voltage circuit breaker

IEC60947-4-1 and GB/T14048.4 Electromechanical Contactors and Motor Starters 

IEC60947-5-1 and GBT14048.5 Electromechanical Control Circuit Electrical Appliance

Scope of Application

Normal use conditions:

◆The upper limit of environmental temperature should not exceed+40 ℃, The lower limit should not be lower than -5 ℃, and and the 24h average temperature should not exceed +35℃; 

Note: Circuit breakers used at ambient air temperatures above + 40℃ or below -5℃ shall be negotiated with the manufacturer.

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

◆ The relative humidity of the atmosphere does not exceed 50% when the maximum ambient temperature is +40℃; Higher relative humidity can be achieved at lower temperatures (e.g. 90% at 20°C), taking into account the condensation on the product surface due to temperature changes.

Normal installation conditions

◆ Installation category: the main circuit of circuit breaker is of class 3, and the control circuit and auxiliary circuit are of class 2;

◆ Installation conditions: Generally, it could be installed vertically or horizontally (transversely);

◆ Pollution level: 3;

◆ External magnetic field: the external magnetic field near the installation site shall not exceed 5 times of the geomagnetic field anywhere.

CBRM5 MCCB (Moulded Case Circuit Breaker)sample