GCS type drawers [1] is a fusion of the advantages of the other low-voltage products and the development of advanced products, used in power plants, petrochemical, metallurgy, telecommunications, light industry, textile, high-rise buildings and other civil, industrial and mining enterprises with electrical systems, high degree of automation in large power plants, petrochemical, telecommunications systems, computer interface requirements and place, as hair, power supply and distribution system in motor centralized control, reactive power compensation of low voltage power distribution equipment. 8MF steel main frame adopts assembled with high strength, good pre-treatment process, the advantages of flexible installation; strictly separated from the function room, which is divided into compartments: functional unit room, bus room, cable room, each function unit is relatively independent role; take cabinet level after level of bus-mounted arrangement, greatly improving the bus dynamic thermal stability, so that dynamic current can reach 76KA; divided 1/2 drawer unit, a unit, a second unit, three-unit size series ; drawer size only change the height and width, depth unchanged, drawers interchangeability with good functional unit; drawer unit with mechanical interlock, with open, close, test, out of positions, such as clearly marked. The basic parameters of the folding editor main circuit rated voltage of this paragraph (V) AC 400,690 Rated frequency (Hz) 50 Rated insulation voltage (V) 690 Rated current (A) the level of bus <4000 Vertical Bus (MCC) 1000 busbar rated short-resistant by the current (kA / 1s) 50,80 busbar rated peak withstand current (kA / 0.1s) 105,176 frequency test voltage (V / min) 2500 Protection class IP30, IP40 conditions of use a folding editor, households in this paragraph use, altitude point of use shall not exceed 2000m. 2, ambient air temperature is not higher than +40 degrees, not less than minus 5 degrees. Within 24 hours, and the average temperature not higher than +35 degrees. More than is required to run the actual situation derating. 3, ambient air temperature of +40 degrees relative to no more than 50%, at a lower temperature allows a greater relative humidity; +20 degrees as 90%, should be taken into account may occasionally produce condensation from temperature changes . 4, when the device is installed with vertical tilt of no more than 5 °, and the entire group in line with relatively flat cabinet column (GBJ232-2) standards. 5, the device should be installed in the absence of severe vibration and shock, and insufficient use of electrical components should not be corroded places.