HXGN-12 Type Fixed AC Metal-Enclosed Ring Network Switchgear

The HXGN-12(F) and HXGN-12(FR) type box-type fixed AC metal-clad ring‑main switchgear is designed for 10 kV, 50 Hz three‑phase AC distribution systems. It provides control, distribution, and switching functions for branch circuits in switch stations. It is widely used in ring‑network power supply, terminal‑type power supply, and packaged substations, among other applications.

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High- and Low-Voltage Switchgear Series

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Product Description

　　Overview

　　The HXGN-12(F) and HXGN-12(FR) type box-type fixed AC metal-clad ring‑main switchgear is designed for 10 kV, 50 Hz three‑phase AC distribution systems. It provides control, distribution, and switching functions for branch circuits in switch stations and is widely used in ring‑network and terminal power supply applications, as well as in packaged substations.

　　Operating environmental conditions

　　Ambient air temperature: upper limit +40°C, lower limit -25°C.

　　Altitude not exceeding 1000 m;

　　Relative humidity: daily average ≤ 95%, monthly average ≤ 90%;

　　The surrounding air shall not be significantly contaminated by corrosive or flammable gases, water vapor, or other such substances.

　　No frequent severe vibrations

　　Installation Diagram

　　Structural and functional characteristics

　　The cabinet is divided into a busbar compartment and a switchgear compartment.

　　The cabinet features an assembled structure, ensuring stability and reliability.

　　It features a unique movable‑door structure, providing excellent protective performance. After the load switch is opened, the movable door automatically isolates the disconnection point, separating the incoming line and busbar compartment from the switchgear compartment, ensuring safe and reliable inspection and maintenance.

　　The modular configuration is highly flexible, enabling the formation of ring‑network power supply units and a variety of wiring schemes (see the typical main wiring diagram).

　　The three phases are arranged in a front-to-back configuration, resulting in a compact cabinet width and minimal floor space. Arc extinction is achieved using a compressed-air principle, ensuring stable and reliable breaking performance.

　　The operating mechanism is available in both manual and electric versions.

　　The mechanical interlocking is advanced and reliable, meeting the “five-protection” requirements. Both the load switch and the earthing switch can be locked in either the open or closed position, and interlocking among the load switches can be implemented according to a prescribed sequence.

　　The main component—load switch and fuse—is easy to replace.

　　No environmental pollution; no risk of fire or explosion.

　　Can be equipped with a shunt trip release.

　　It can be equipped with a live‑display device and a phase‑comparison device.

　　Technical Performance Parameters

Project Name		Unit	Parameter
			HXGN-12(F)	HXGN-12(FR)
Rated voltage		KV	10(12)
Rated frequency		HZ	50
Rated current		A	630	100
Rated transfer current				3150 (vacuum)
Rated peak withstand current		KA	50
Rated short-time withstand current (2 s)			20
Rated short-circuit making current (peak value)			50
Rated short-circuit breaking current (RMS)				31.5
Rated Insulation Level	1-minute power-frequency withstand voltage (to ground, between phases/breaker contacts)	KV	42/48
	Impulse withstand voltage (to ground, phase-to-phase/breaker gap)		75/85
Ground loop	Rated short-time withstand current	KA	20
	Rated peak withstand current		50
Rated closed-loop breaking current		A	630
Rated active load breaking current			630
Rated cable charging and breaking current			25
Rated current of the main busbar		A	630
Operating method			S (Manual)	D (electric)
Protection rating			IP3X
External dimensions (width × depth × height) (*The cabinet height of 1700 mm is a design dimension specified by the Italian company VEI.)		mm	400x940x1900(1700) 650x940x1900(1700) 800x940x1900(1700)