摘要
众多理论表明,燃弧时间≤100ms时,煤矿开关设备没有显著的损坏,一般可以在检验绝缘电阻后投入使用。目前,当防爆开关自身保护拒动时,只能靠上一级开关跳闸断电,此时已超过最佳动作时间,燃弧已对开关内部造成不可避免的损害,只能靠上一级开关跳闸断电来保护该开关。
It is indicated in multiple theories that coal mine switchgears will not be significantly damaged when the arcing time is less than or equal to 100 ms,and it can generally be put into use after the insulation resistance is tested. However,at present,when the explosion-proof switch resists self-protection,only the upper switch can trip the power off to protect the switch. At this time,it has far beyond the optimal action time,and the arcing has caused irreparable damage to the interior of the switch.
作者
唐骏
王吉华
Tang Jun;Wang Jihua(CHN Energy Ningxia Coal Industry Co.,Ltd.,Yinchuan,Ningxia,750001)
出处
《能源科技》
2020年第6期39-40,共2页
Energy Science and Technology
关键词
窄带物联网
煤矿
弧光保护
narrowband IoT
coal mine
arc protection
