72.5kV outdoor high voltage vacuum circuit breaker is designed for harsh environment, using fully sealed stainless steel housing and vacuum arc extinguishing technology, with explosion-proof, anti-corrosion, anti-ultraviolet performance, adapt to -40℃ to +40℃ extreme temperature. Rated short circuit breaking current 31.5kA, mechanical life 10,000 times, maintenance-free structure significantly reduces operation and maintenance costs, suitable for substations, industrial and mining distribution and wind power/photovoltaic high voltage grid-connected systems, in line with IEC 62271 and GB standards