Niederdruck-Einschubtechnik Series Telefonzentrale (GCK, GCL)

Metal enclosures made from a continuous length of sheet steel double folded at the front, with back welded to the frame and internally with polyester epoxy resinpaint. They are enclosures with transparent templated glass door which keeps the protection degree Ip-55. GCK, GCL series low pressure shaft cabinet model switchbox are used for electric motor control central, power distributing centre. They are applied to power stations, electric substations, buildings, edifices, airports, hospitals, industrial and mining establishments as three-phase 50Hz, voltage 380V and as follow electric system suited for the electricity, the feed, the illumination, the motor control and the power compensates. It conforms with the GB7251-97, ZBK36001-89 and IBC439-1 standards. GCK, GCL switchbox skeleton is made from "FA28" model material or "c" model low-alloy channel steel. The main bus stood parallel to the top of cabinet, door sealed by silicon adhesive tape, on the upper and lower part of cabinet have trepanning for ventilation or heat exchanger systems. Technical parameters: 1) Main circuit nominal insulation voltage: 660V 2) Main circuit nominal voltage: AC 380V 3) Auxiliary circuit nominal voltage: AC 220V, 380V, 110V 4) Rated frequency: 50 / 60Hz 5) Rated current: a) Level bus: ≤3,200A b) Vertical bus: 1,600A 6) Nominal short time withstand current (IS): 50kA, 80kA 7) Nominal peak reliability current: 105kA, 176kA 8) Power frequency test voltage: a) Main circuit: 2,500V/min b) Auxiliary circuit: 1,760V/min 9) Peeling levels of protection: IP3LO, IP4LO 10) Protection: a) In circuit design, operating power source adopted electric move measure (with isolation transformer) b) In mechanism design, we set much value on design between cabinet and insulating; it up to IP40 standards provided by IEC529 and GB4208 and gives a guarantee for personal security of fixing, mending and operator Usage conditions: 1) Working altitude limit: 2,000m 2) Indoor, no dust, aggressive gas or rain 3) Ambient temperature and relative humidity: no higher than 40°C, no lower than -5°C, average temperature limit of 35°C, relative humidity limit of 85% 4) No shock and bump 5) Fixing inclination pitch is not over 5%