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When electrons collide with SF₆ molecules, they combine to form heavy negative ions with a probability of nearly 100%. This characteristic is of immense practical value for the deionization of the residual arc column and the arc-extinguishing process.

Over the next 3-5 years, KYN28 (12kV medium-voltage metal-enclosed switchgear) will remain the absolute mainstream product in China's 10kV and 24kV distribution networks, industrial users, and new energy sectors. Its overall market outlook is stable and positive, showing a trend of structural upgrading and continued growth in overseas demand.

Oil immersed transformers remain one of the most widely used electrical power distribution solutions across utilities, industrial facilities, renewable energy projects, commercial buildings, and infrastructure developments. Their superior cooling performance, excellent insulation properties, long service life, and ability to handle high electrical loads make them a preferred choice for reliable power transmission and distribution.

The application of the high-voltage vacuum circuit breaker in our power supply system began in 1978. Its light weight, simple structure, long service life and other advantages were quickly recognized by the power department operation, overhaul and technicians. The quality of the early domestic high voltage vacuum circuit breaker is not stable enough, the on-load voltage is high in the operation process, and there is leakage phenomenon in some vacuum arc extinguishing chambers.

The processing and manufacturing industry of low-voltage switchgear is a key component of the power transmission and transformation equipment processing and manufacturing industry, and plays a crucial role in the entire power industry. The key components of switchgear include high-voltage circuit breakers, voltage transformers, locally installed microcomputer relay protection equipment, actual operation control circuit accessories (door handles, display lights, pins), and auxiliary power switches from various manufacturers of switchgear.