UNE-EN IEC 61557-4:2021 1000V AC 和 1500V DC 低壓配電系統(tǒng)的電氣安全 保護(hù)措施測試、測量或監(jiān)測設(shè)備 第4部分:接地電阻和等電位連接
Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 4: Resistance of earth connection and equipotential bonding (Endorsed by Asociación Es...