The NDM5-1600 series of moulded case circuit breakers (referred to as circuit breakers) have a rated insulation voltage of 1000V and apply to circuits with the AC 50Hz/60Hz, the rated working voltageAC380/400/415V、AC500V、AC660/690V、AC800V，Vand rated working current (800A to 1250A). The circuit breakers are used for distributing power while protect the overload, short circuit and under-voltage (with a under-voltage release) of lines and power units as well as the infrequent starting, braking, overload and short circuit of motors.
Each voltage level and short-circuit section capacity of the circuit breaker can be connected with the lower incoming line.(Except AC800V )

Technical Parameters

Normal Working Environment of Circuit Breaker
1) The altitude of the installation site doesn’t exceed 2,500m. See the “High-altitude DeratingFactor Table of Circuit Breaker” for the derating factor at the altitude;
2) The ambient temperature is -35℃ ~ + 70℃; the average within 24 h shall not be more than+35℃. If the ambient temperature is higher than +40℃, the user needs to reduce the capacity.See the “Derating Factor Table of Temperature Change for the Circuit Breaker” for the derating factor;
3) Its relative humidity at an ambient temperature of +40℃ should not exceed 50%. A higherrelative humidity is allowed at a lower temperature. For example, the relative humidity at20℃ can reach 90%; for frost due to temperature change, the corresponding measuresshould be taken;
4) The product can withstand the effects of wet air, salt mist, oil mist and mould;
5) The installation category of the circuit breaker connected to the main loop is: Category Ⅲ (power distribution and control level), The installation category of the circuit breaker notconnected to the main loop is: Category Ⅱ (load level);
6) The pollution level is Level 3;
7) Degree of protection: IP 20;
8) The product should be installed in places that are free from explosive media, media corrosiveto metal, insulation damaging gas, and conductive dust, which should be also avoided fromsnow and rain;
9) In case of stricter user conditions than the above description, negotiate with the manufacturer.