Type and meaning
Normal working conditions
Ambient air temperature
The upper limit value is not more than + 40 ℃, the lower limit value is not less than -5 ℃;
The average value of 24 hours does not exceed + 35 ℃;
· installation site elevation does not exceed 200 OM.
· atmospheric conditions
Atmospheric relative humidity does not exceed 50% at ambient air temperature of + 40
℃: higher relative humidity can be achieved at lower temperatures, with the average
maximum of the wettest month
The average maximum relative humidity of the relative humidity is 90% , while the
average monthly minimum humidity for the month is + 25℃, taking into account
temperature changes that occur on the product surface
More than the provisions, users should consult with the factory.
protection level: 3.
Installation conditions: vertical or horizontal installation.
· installation type: Class III
1. The ratings of circuit breakers are shown in the table below.
2, Distribution circuit breaker over-current release action characteristics see table 3, (for 30 ℃ each pole at the same time power characteristics).
3, Motor circuit breaker over-current release action characteristics see table 4, (for 30 ℃ each pole at the same time power
4, Circuit breaker short-circuit instantaneous protection current setting value see table 5, its accuracy is + 20% . The accessories are divided into four types: shunt release, under voltage release, auxiliary contact and alarm contact; external accessories include rotary handle operating mechanism, electric operating mechanism, etc.