1．Structure and Features:
　·Solid sealing pole technology
　·Completely modularized operating meachanism
　·Electronic secondary control cabinet
　·Compressed-spring tulip contact
　·Reliable interlocking system for CB and CB's trolly
　·Industrial designed panel and user-friendly operating handle
2．Technical data:
　·Standardized by: GB/IEC
　·Rated voltage: 12/24KV
　·Rated frequency:50/60Hz
　·Rated current: 630-4000A
　·Rated symmetrical interrupting current: 20-40KA
　·Rated short time withstand current: 20-40KA
　·Lightning impulse withstand current: 50-125KA
　·Power frequence withstand voltage: 42KV/1S
　·Lightning impulse withstand voltage: 75KV