Releasing action of distribution box s switches caused by heat-affection in fire will lead to tripping,thus power supply for fire equipment can t be guaranteed.

• 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。