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| Low Pressure Drawout Series Switchboard (GCK, GCL) |
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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% |
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