75kV/126kV Gas-insulated Metal-enclosed Switchgear (GIS)

Features:
1) Epoch-making compact: volume contracted GIS is merely 40% of common
deflection phase type GIS
2) Minimum volume, light weight and earthquake resistant: it is the product
of minimum volume among similar domestic GIS compartment units, standard
compartment width is only 1.2 to 1.5m; casing and conductor adopt aluminum
alloy material, which features corrosion resistant, light weight and good
earthquake resistant performance, standard compartment weight is about 2
to 4MT
3) Strong breaking capacity: circuit breaker adopts self-energy arc extinction
principle, has very high short circuit breaking and closing capacity, charging
current of breaking and closing circuit has no re-strike and re-arcing phenomena,
electric life reaches 16 times; isolating switch could meet the requirement of
closing bus transfer current and bus charging current; earth switch could meet
the requirement of closing short circuit current and closing induction current
4) No dangerous switching over voltage: due to special performance of SF6 gas to
small current arc, switching over voltage may be suppressed to the minimum;
when cut off charging current of overhead line or cable, neither re-acing nor
dissociation will be generated; when cut off excitation current of transformer,
observed max. over voltage multiple will not exceed 2.5pu
5) High insulation level: the product has rationally designed insulation structure,
all insulating parts used have passed strict quality inspection; overall withstand
voltage level exceeds international and IEC standard requirement; insulation is
stable and reliable; repair cycle of current carrying main circuit is relatively long;
6) High safety and reliability, easy maintenance and repair, low noise, short installation period and safe without fire.