1. Installation altitude≤2000m
2. Ambient air temperature -5℃ ~+40℃ average temperature of 24 hours must below +35℃
3. Relative humidity below 90% when the temperature is +25℃±5℃
4. Ambient pollution level: 3
5. Installation category of the starter: III
Acting characteristic of each phase in distribution circuit breaker in the load balanced condition
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