MV HXGN-12/630-20 SF6 Insulated Compact Metal-enclosed RMU - Modularization Design

A MV HXGN-12/630-20 SF6 insulated compact metal-enclosed RMU.

MV HXGN-12/630-20 SF6 insulated compact metal-enclosed RMU is widely used because of reliable performance, excellent durability and maintenance free.

MV HXGN-12/630-20 SF6 insulated compact metal-enclosed RMU is designed of modularization. It not only meets the requirements of end-users and network node, but it also can satisfy the needs of various distribution switching stations, box transformer substations and cable branch boxes. It features compact structure, reliable performance, excellent durability and maintenance free. MV HXGN-12/630-20 SF6 insulated compact metal-enclosed RMU contains a 304 stainless steel box, and all primary electriferous parts and switches can be included in the box, so it is a complete closed system. The protection degree is IP67.

Normal working conditions:

Temperature range: -40 °C to +40 °C.

Average relative humidity: daily: ≤ 95%, monthly: ≤ 90%.

Altitude: ≤ 2000 m.

Seismic intensity: ≤ 8 degree.

Workplaces should be free of water, fire, explosion, chemical corrosion and severe vibration.

Note: if the actual working conditions are beyond normal working conditions, contact with manufacturers in time.

Standard:

GB/T11022-1999.

GB3906-2006.

GB1985-2004.

GB16926-1997.

GB3804-2004.

GB1984-2003.

GB3309-89.

Technical parameters (1)

Items C module F module V module CB module

Load switch Composite apparatus Vacuum switch Disconnecting/earthing switch Vacuum circuit breaker Disconnecting/earthing switch

Rated voltage (kV) 12 12 12 12 12 12

Power frequency withstand voltage phase-phase/across open contacts (kV) 42/48 42/48 42/48 42/48 42/48 42/48

Lightning impulse withstand voltage phase-phase/across open contacts (kV) 75/85 75/85 75/85 75/85 75/85 75/85

Rated current (A) 630 125 630 - 1250 -

Closed loop breaking current (A) 630 - - - - -

Cable charging breaking current (A) 10 - - - - -

Rated active load breaking current (A) 630 - - - -  

Short-circuit breaking current (kA) - 31.5 20 - 25 -

Making capability (kA) 50 80 50 50 63 63

Short-time withstand current (4 s) (kA) 20 - 20 20 (2 s) 25 25

Rated transfer current (kA) - 1700 - - - -

Mechanical life (Times) 2000 10000 10000 2000 10000 5000

Technical parameters (2)

Items Parameters

SF6 pressure (relative pressure) 0.4 bar (20 °C)

Yearly leakage rate (%) ≤ 0.1

Protection degree SF6 air chamber IP67

Fuse cartridge IP67

Switchgear shell IP3X

Bus-bar in switchgear 400 mm2Cu

Earthing bus-bar in switchgear 150 mm2Cu

Air chamber stainless steel shell thickness 3 mm

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