NBSB1-63 with Busbar TYPE MINIATURE CIRCUIT BREAKER(MCB series)

Considering the excessively low ambient temperature changes the fit of structural
parts, the lower limit value is generally not less than -5℃. Considering the service
life of the circuit breaker, the average value of 24 hours is not more than +35℃. b)
Note: ① The working conditions with the lower limit of -10℃ or -25℃ shall be
declared to the company when ordering.
② If the upper limit exceeds +40℃ or the lower limit is lower than -25℃, the user
shall negotiate with the company.
Installation location
c)
The altitude is not more than 2000m;
Protection circuit requirements;
Short-circuit current Ik calculated at installation point is not more than 6000A; Atmospheric conditions:
The atmospheric relative humidity does not exceed 50% when the ambient air
temperature is +40℃, and can have a higher relative humidity at lower temperatures.
The monthly average maximum relative humidity in the wettest month is 90%, while
the average minimum temperature in the month is +25℃ and the condensation on the
product surface due to temperature changes.
The installation category of Circuit Breaker protection circuit is Ⅲ
d) Pollution level: Pollution level is III.
e) Installation category: .
f)The traverse section is configured according to the maximum agreed heating
current Ith of the circuit breaker.