对B类电气装置接地问题的商榷

SOME COMMENTS ON RULES OF EARTHING ARRANGEMENTS OF ELECTRICAL INSTALLATION CLASS B

对《交流电气装置的接地》规范 (DL /T6 2 1- 1997)中 B类电气装置的某些规定提出了意见。认为配电变电所的接地关系到低压用户的用电安全 ,低压网络的接地故障引起的低压用户人身电击和电气火灾事故的危险远多于变电所高压侧的接地故障引起的危险 ,应重视对低压网络接地故障危害的防范。为保证用户用电的安全 ,应利用一些条件来尽量降低变电所的接地电阻。文中还建议中国电气人员应掌握和运用有关用电安全的国际电工标准 IEC 6 0 36

This paper presents some comments on rules B in electrical code Grounding for AC Electrical Installation (DL/T621 1997). The author considered that the earthing of distribution substation is of great importance to the electrical safety of LV electrical consumer, and the danger of electric shock and electrical fire caused by earthing fault in LV system is far more dangerous than that caused by earthing fault in substation HV side. For the purpose to assure electrical safety of consumer it is important to reduce the earthing resistance of distribution substation to a value as low as possible. The author urges electrical engineers in China to know IEC 60364 standard and to work in conform to safety requirements of this standard.