HM1-100M molded case circuit breakerWarranty Period: 2years High quality with competitively price,prompt delivery. HM1-100M molded case circuit breaker/MCCB - 1.Work environment: ambient air temperature: -5°C~+40°C; Altitude: below 2000m-; The location of the air relative humidity in the highest temperature + 40 °C for not more than 50%, in the low temperature can have Higher relative humidity, for example when 20 °C reaches 90%. Due to temperature change should be taken from