... According to number of poles: 3 poles, 4 poles MCCB/ moulded case circuit breakers Product Descriptionmoulded case circuit breakers are ... ), H(high breaking type)2. According to connection mode of MCCB: Front panel connection (basic connection mode), rear panel connection, ... poles, 4 polesPlease contact Ms.Amy YIN --- yinamy9@gmail [dot] com and sikeqd@126 [dot] com MCCB/ moulded case circuit breakers