Purpose and scope of use

GNM1 series molded case circuit breakers have a rated insulation voltage of 800V, are suitable for AC 50Hz, rated working voltage 690V and below, and rated working current from 10A to 1250A for infrequent switching and infrequent motor starting (GNM1-800 and GNM1-1250 have no motor protection).

Normal working conditions

• The altitude of the installation site shall not exceed 2000m;
• The ambient air temperature is -5°C~+40°C, and the average value of 24 hours does not exceed +35°C;
• The relative air humidity of the installation site shall not exceed 50% at the maximum temperature of +40°C, and the average minimum temperature of the wettest month shall not exceed +25°C, and the average maximum relative humidity of the month shall not exceed 90%, and the condensation on the surface of the product due to temperature changes shall be considered;
• The pollution level is level 3;
• The safety category of the main circuit breaker and the undervoltage tripper is Ⅲ, and the installation category of the other auxiliary circuits and control circuits is II;
• Able to withstand the influence of humid air, salt spray, oil pollution, mold and nuclear industrial environment;
• Installed in a place where there is no explosion hazard and no conductive dust, no enough to corrode metal and damage insulation;
• There is no rain and snow at the installation site;
• The circuit breaker has an isolation function, and the symbol is _/| \/ .

Model meaning

Tripping method and attachment code

Installation method

This series of circuit breakers is generally installed vertically (see figure below).