GB/T 18216.4-2021

Electrical safety in low voltage distribution systems up to 1000V a.c and 1500V d.c—Equipment for testing，measuring or monitoring of protective measures—Part 4：Resistance of earth connection and equipotential bonding

交流1000V和直流1500V及以下低压配电系统电气安全 防护措施的试验、测量或监控设备 第4部分：接地电阻和等电位接地电阻