Standards

●IEC60907-2/GB14048.2 Low voltage breakers

pollution Grade

●Grade 3 while operating in industrial enviorment under IEC60947-1 and 60664-1 standarc

Anti-Humidity&Heat Ability

●Dry cold, dry heat, wet heat

Ambient Temperature

●SGM3 series MCCB can work continuously in normal environment and ambient temperature of-5℃ to 40℃

●When ambient working temperature>40℃(motor protection>60℃), should follow to temperature reduced capacity coefficient or contact us

Altitude

●Normal installing altitude:<2000m

●if installing altitude>2000m, must consider the dielectric strength changes and the temperature drops that can follow to altitude reduced capacity coeficient or contact us

Humidity

Normal working conditions:

●When ambient air temperature is +40℃, the relative humidity of atmosphere can not>50%.If the temperature is low, it can work in relative high humidity.

●The monthly average relative humidity is 90% for wettest month

●Should consider the performance influence of condensation on the product surface

Reliable Contact Indication with Isolation Function

All SGM3 series MCCB strickly measure up to all the isolation terms under IEC60947-2 standard

●Isolation position matches to O(OFF)

●Only when the contact is truly open, the operating handle can indicated to "OFF"

●To turn the handle or electric operation mechanism will not influence the reliability of contact indication system

●The mechanical reliability of contact indication system

●No leakage current

●Overvoltage withstand capacity between input and output terminals

IP Grade

●Circuit breaker body : IP20

●Circuit breaker installed in cabinet: with toggle handle : IP40

●Circuit breaker installed in cabinet: with electric operation mechanism: IP40

Remark:

●SGM3-63/100/125AF,<40A, Minimum protection current 400A; ≥40A, 10/12n

●100A, F/N type, Minimum current ≥40A

●4 pole N phase has A and Btypes:

A Type: No trip ass'y in N phase, keep N phase connecting, no operating with other 3 phases

B Type: No trip ass'y in N phase, operating with other 3 phases