ELECTRICAL INSTALLATIONS OF BUILDINGS. PART 4: PROTECTION FOR SAFETY. CHAPTER 44: PROTECTION AGAINST OVERVOLTAGES. SECTION 442: PROTECTION OF LOW-VOLTAGE INSTALLATIONS AGAINST FAULTS BETWEEN HIGH-VOLTAGE SYSTEMS AND EARTH.
建筑物的电气装置 第4部分:安全保护 第44章:过电压保护 第442节:低压装置的保护 防止高压系统和接地之间发生故障