Recently, Baoguang Co., Ltd. has set a new domestic record with its independently developed TD□1-126/3150-40B vacuum interrupter, which was integrated into an eco-friendly gas-insulated switchgear (GIS) jointly developed with XD Xi'an High Voltage Switchgear Co., Ltd. Our product successfully passed the type test and broken the domestic record for similar products with an excellent performance of 21 full capacity breaking operations!

This breakthrough marks a significant advancement in China's key performance metrics for high-voltage eco-friendly switchgear, injecting core momentum into the green transformation of power grids.

Part one: "Collaboration for Shared Success: A Milestone from R&D to Application"

Pioneering Post-Type Breaker Grid Deployment:
In 2024, Baoguang's vacuum interrupters, in collaboration with XD Xi'an High Voltage Switchgear Co., Ltd., achieved China's first grid-connected operation of a high-capacity 126kV eco-friendly post-type vacuum circuit breaker at State Grid's Luozhuang 110kV substation (Luanchuan County, Henan). This milestone lays the groundwork for future GIS product industrialization.

Full Supply Chain Localization:
From manufacturing core components (metalized ceramics, bellows) to mastering vacuum sealing processes and conditioning testing technologies, Baoguang has achieved complete in-house production of vacuum interrupters. This breakthrough in key manufacturing techniques accelerates the domestic development of high-end power equipment.

Part two: Breakthrough in Technical Parameters & Overcoming High-Performance Engineering Challenges

World-Leading Technical Parameters:

Rated current: 3,150A (meets 1.1× temperature rise requirements)

Short-circuit breaking capacity: 40kA

Insulation performance:

Power-frequency withstand voltage: 303kV

Lightning impulse withstand voltage: 653kV

Electrical endurance: 21 full-capacity operations

Part three: Sustaining Innovation to Forge Industry Benchmarks

Baoguang Co., Ltd. will leverage this breakthrough as a springboard to accelerate its strategic product deployment. Adhering to its high-voltage serialization approach, our company will expand into higher voltage classes (252kV, 550kV) to meet diverse transmission and distribution needs. Through global expansion under the Belt and Road Initiative, Baoguang will promote China's eco-friendly GIS technology worldwide, contributing Chinese solutions to the global energy transition.

From pioneering post-type circuit breaker grid integration to advancing GIS technology, Baoguang has harnessed innovation to script a green revolution in China's high-end power equipment sector. Moving forward, we will continue collaborating with industry partners to drive technological breakthroughs and industrial upgrading, powering the development of a clean, low-carbon, safe, and efficient new energy system!