Home / Standards / GB/T 46131-2025 GB/T 46131-2025 Active Technical requirements and test methods for tap-changer for ultra high voltage transformers 特高压变压器用分接开关技术要求与试验方法 Standard Type GBT ICS 29.020 CCS F 21 Status 现行 Issue Date 2025-08-29 Implementation 2025-12-01 Responsible Dept 中国电力企业联合会 Drafting Unit N/A