针对目前配电箱开关在火灾热影响下由于脱扣机构动作引起跳闸，不能保证消防设备供电问题，经过对消防配电箱的火灾试验研究，分析了外部热源对开关动作的影响。
Releasing action of distribution boxs switches caused by heat-affection in fire will lead to tripping, thus power supply for fire equipment cant be guaranteed.
断路器可以加装分励脱扣器、压脱扣器，辅助触头，报警触头和电动操作机构。
The Breaker can be attached with shunt tripping device, undervoltage tripping device, auxiliary contacts, alarm contacts and motor-operated drive.
断路器可以加装分励脱扣器、压脱扣器，辅助触头，报警触头和电动操作机构。
The Breaker can be attached with shunt tripping device, undervoltage tripping device, auxiliary contacts, alarm contacts and motor-operated drive.
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