Typical primary plan

Rated Parameters

Product Overview

QLG series ring main unit is a SF6 gas insulated metal enclosed switchgear independently developed and produced by our company. The equipment uses SF6 gas as insulation and breaking medium, and the load switch, vacuum circuit breaker and live busbar are all sealed in a closed stainless steel container filled with a certain pressure. The external American standard / European standard bushing is connected with the incoming and outgoing cable through the cable joint to form a fully insulated and fully closed structure. This effectively prevents flooding and withstands contamination, making it suitable for various harsh environments. The product is widely used in 35kV ring network or terminal power supply system.

Product Features

Modular and expandable

The use of expansion modules in coordination allows for up to five modules with the same gas tank. Beyond that, further expansion is achieved through busbar expansion.

Maintenance Free

SF6 gas integrated structure, with moving and static contacts, arc extinguishing chamber, busbar sealed in the same gas tank. It is designed for a maintenance-free life of 30 years.

Reliable Mechanical Interlock

It has a variety of reliable mechanical interlocks, and there are analog signs on the cabinet panel to fully ensure the safety of operation.

Automatic and Intelligent

Cooperate with DTU to realize automatic and intelligent control.

Beijing Qingchang Power Technology Co., Ltd. was established in 2005 with a registered capital of 103.8 million yuan.

It is an innovative enterprise on the Beijing Stock Exchange, with stock code 430057 and 300 employees. The Company's headquarters is located in the Shangdi Information Industry Park in Zhongguancun, Beijing, where high-tech enterprises gather. The intelligent manufacturing base is adjacent to the beautiful Yanqi Lake and within the national development zone "Huairou Science City", in Huairou District, Beijing, covering an area of 26,600 square meters.

The Company focuses on technical research and intelligent manufacturing in the field of medium voltage, centering on the core technology of ring main unit (RMU) products. It continues to expand in the fields of 10-35kV Eco-friendly Gas insulated switchgear, new energy pre-installed substations, distribution automation terminals, and other products, providing high-quality products and services for power grids, new energy, railways, and other industries in all provinces in China and multiple international regions. The Company is a China's SRDI (Specialized, Refinement, Differential and Innovation) "little giant" enterprise, as well as a national high-tech enterprise. It is also a cooperative unit of Beijing Enterprise Technology Center, North China Electric Power University Graduate Workstation, and Zhejiang University. The Company's manufacturing base has first-class intelligent manufacturing production lines, and is equipped with material analysis professional laboratories, EMC electromagnetic compatibility laboratories, high-voltage electrical temperature rise laboratories, X-ray inspection laboratories, high-voltage electrical comprehensive laboratories, etc. We have international-class testing methods and advanced testing equipment.

The Company takes serving the global power industry as its responsibility and has always adhered to the business philosophy of "serving the global market and building a world brand", making unremitting efforts to achieve the goal of becoming a "well-known brand in the global power sector"!