Successfully widely used by Three Georges project, national engineering designing institute, mining company, cement mill, stell mill,sugar factory,wood industry, chemical industry, city planning, and other place with big power motor and high electric consume place Executive standard: GB3904; GB3906; GB16926; GB/T11022; GB15166; GB1985; IEC420 Structure feature: ring net cabinet with full-closed metal structure, to prevent foreigh matters get into cabinet to cause short circuit, also prevent human touch electrified working parts. multi safety protection function easy operation and maintenance observe window for easy check inside condition the main chamber are: cable chamber; --- for cable connection, also install breaker /arrester/current sensor/earth switch/safety lock switch control chamber---loaded switch(SF6) /dasymeter/ gas density relay lower voltage chamber ---interlock device/ operation device / indicator generatrix chamber---on top of cabinet, 3 phase generatrix each chamber are seperated individually to avoid interfere, and keep safety the cabinet size will designed according to loops. the general size is W 375--1000mm/D 960mm/H 1600--1800mm Working condition: No drip on cabinet, no explosive ,no corrosion gas