The LW30-126 outdoor high voltage self-energy SF₆ ceramic pole circuit breaker is a three-phase AC 50Hz outdoor high-voltage switching device. It is suitable for the control and protection of 126kV power transmission and distribution systems, and can also be used as a tie circuit breaker or for switching capacitor banks. This circuit breaker complies with GB1984-2003 "AC High Voltage Circuit Breakers" and meets the requirements of the International Electrotechnical Commission standard IEC62271-100:2001 "High-voltage switchgear and controlgear - Part 100: High-voltage alternating-current circuit breakers".