Shanghai Ben-Ren Electric Co., Ltd. is approved by the national Ministry of Machinery and the Ministry of Electric Power designated independently engaged in the research and development and production of 35kv, 24kv, 10kv, 0.4kv high and low voltage switchgear sets, solid insulation ring network cabinet, 550 high voltage switchgear, outdoor box substation, DC power supply device, transformer, automatic control device and indoor and outdoor high voltage vacuum circuit breaker: ZW43, ZW37, ZW32, ZW20, ZW10, ZW8, ZW7, ZW6, VS1, ZN28, ZN85, ZN12 and indoor and outdoor permanent magnet vacuum circuit breaker and vacuum load switch FZW32, FZW28 and other products of the enterprise.