Operating and installation conditions
◆The altitude of the installation location shall not exceed 2000m;
◆The ambient air temperature shall be -5℃ ~ +40℃, and the average temperature of 24 hours shall not exceed +35
◆℃T;he relative air humidity at the installation location shall not exceed 50% at the maximum temperature of +40℃.
At a lower temperature, the higher relative humidity may be higher, and the monthly mean minimum temperature of
twheet test month shall not exceed +25℃; the mean maximum relative humidity of the month shall not exceed 90%, and
tchoendensation occurs on the surface of the product due to temperature changes shall be considered.
◆Pollution level: 3
◆The installation category of the main circuit and undervoltage trip unit of the MCCB is III, and that of the other
caiurxciuliiatsr ya nd control circuits is II.
◆Applicable electromagnetic environment: A
◆Capable of withstanding the effects of humid air, salt spray, oil, mold, and nuclear industrial environment
◆Maximum installation inclination: ± 22.5
◆MCCB can work reliably when it is subjected to normal vibration of the ship.
◆MCCB can work reliably under earthquake conditions (4g)
◆MCCB shall be installed in a place where there is no danger of explosion and no conductive dust, no factors that
cwooruroldd e metal or destory the insulation.
◆The installation site is free from rain and snow.
◆The circuit breaker has isolation function with the symbol