Three way valve renovation (no disassembly and verification required) cases

Taizhou 220kV Jiaoxia Substation, Ningbo 220kV Yiting Substation, Shandong Jining 220kV Keyuan Substation and other Pinggao ZF11-252 GIS switchgear combined with circuit breaker chamber SF6 density relays are equipped with online verification three-way valves.

Install online calibration three-way valves on the SF6 pipelines of the converter transformer sleeves at ± 800kV Jinhua Converter Station and ± 800kV Shaoxing Converter Station.

Shandong Linyi 220kV Muling Substation, Dongying 220kV Guangli Substation and other Taikai ZF16-252 GIS switchgear combined with circuit breaker gas chamber SF6 density relay have been upgraded with online verification three-way valves.

Installation of online calibration three-way valves for ABB-HPL245B1 GIS switchgear at Taizhou 220kV Shenggu Substation, 220kV Sha'ao Substation, and Datong 220kV Kaiyuan Road Substation.

ABB ELK-04 GIS switchgear for PetroChina 110kV Puxian Substation, 110kV Yangqu Substation, 110kV Zhengzhou Station, etc., combined with SF6 online monitoring and installation of online calibration three-way valves.