Hypobaric taking out type switch cupboard GCK1 (1A) type is suitable for exchanging 50, 60 Hz, specified voltage 600 Vs in three phases, specified electric current 4000A and following three- phase four line make and three-phase 5 line make power system, apply to the power plant extensively, transformer substation, industrial and mining enterprises, hotel of the building, airport, quay and broadcast and television, etc. communication in the center come as generate electricity, power transmission and distribution, electric energy change and power PC and MCC, control centre of motor, of distribution that electric energy consume.