Description：

SCXG-12 type Full Insulated Compact Metal-enclosed Unit switchgear (Inflatable Cabinet for short) is a switchgear which adopts modular design, and can be combined according to different purposes to meet the requirements of end users or network nodes. At the same time, the inflatable cabinet can meet the needs of various power distribution openers, box substations, cable branch boxes. It’s compact, safe, reliable, long-life and maintenance-free.

Features:

u Using SF6 gas as arc extinguishing and bonding medium.

u Full insulated and full sealed structure. Protection level up to IP67 because of 1.4bar SF6 gas inside. Still operating normally in the extreme case of short-term flooding.

u Safeguarding the personal safety of operators in extreme situations because of the safety relief channel.

u Two types: fixed unit combination and expandable unit combination.

u Side or side expansion depending on the installation location.

u Complete and reliable Five-protection system. Maintenance-free for life.

Using environment:

u Temperature: Min -40℃~Max+45℃;

u Relative humidity: Daily average ≦95%; Monthly average≦90%;

u Altitude: ≦3000m;

u Shock level: Horizontal acceleration 0.4m/s2，Vertical acceleration 0.15m/s2；

u Installation location: The place with no severe impact, serious pollution and chemical corrosion, no conductive dust and explosion risk.

When the conditions of use exceed the above range, the user shall negotiate with us to determine the allowable range or take corresponding supplementary technical measures.

Technical characteristics：

u SF6 gas pressure: 0.4 bars under 20℃（Relative pressure）

u Annual leakage rate：≦0.05%/year

u Immersion test：a pressure of 0.3 bars under water/24 hours

u Arcing test: 25KA/0.5S with the arc extinguisher, 16KA/lS without the arc extinguisher

u IP grade: SF6 air chamber. Fuse tube is IP67. Switch cabinet shell is IP4X

u Gas chamber stainless copper shell thickness: 3.0mm

Standard configurations of each module in the inflator:

u 630A busbar.

u Three-location load/ Grounding switch.

u Three-location single spring operating mechanism with two independent load switches and grounding switch operating shaft.

u Position indication of load switch and grounding switch.

u In-line casing located horizontally at the front. Bolted casing in 400 series of 630A.

u Convenient add-on padlock on the panel for all switch functions.

u Ground busbar.

u Reserved bus extension.

u Capacitive voltage indicator for the incoming bushing.

u Only one pressure gauge with a detection SF6 density installed in each SF6 gas box.

u Lifting lugs.

u Operating handle.

Remarks: The extension must be indicated when confirming the contract.

Technical Parameters:

Item	unit	Module C	Module F	Module V
		Load switch	Composite apparatus	Vacuum switch	Isolation/ Grounding switch
Rated voltage	KV	12	12	12	12
Short-time power frequency withstand voltage (Phase to phase, Phase to ground/Fracture)	KV	42/48	42/48	42/48	42/48
Lightning impulse withstand voltage (Phase to phase, Phase to ground/Fracture)	KV	75/85	75/85	75/85	75/85
Rated current	A	630	125
Rated take-over current	A		1750
Closed-loop breaking current	A	630
Cable-charging breaking current	A	25	25	25
5% Rated active load breaking current	A	315
Ground fault breaking current	A	17.4
Breaking current of cable charging during ground fault	A	115/87
Short circuit breaking current	KA		31.5	25
Closing ability	KA	63		63	63
Rated short-time withstand current（4S）	KA	25		25	25
Mechanical life	Time	5000	5000	1000	3000

Remark: The rated current of the equipment depends on the rated current of the selected fuse.