UNM1L series circuit breakers and auxiliaries comply with the
following international standard:

IEC/EN 60947-1
Low-voltage switchgear and controlgear-Part 1:General rules

IEC/EN 60947-2
Low-voltage switchgear and controlgear-Part 2:Circuit-breakers

UNM1L ELCB(Standard Use Environment for ELCB serise)

1) Ambient Temperature: Within the range of -5℃~+40℃(However,the average for the duration of 24 hours must not exceed 35℃)
2) Altitude: 2000m or less
3) Installation class: III
4) The magnetic field near the installation site should not be more than five times the earth magnetic field in any direction.
5) Pollution levels: II