HXGN □ -12 Fixed type metal ring main switchgear

HXGN □ -12 Fixed type metal ring main switchgear (hereinafter referred to as ring main unit) is a new type of high- voltage switchgear produced for the renovation and construction of urban power grids. In the power supply system, the ring main unit is used for breaking load current and making short-circuit current. It is suitable for AC 12kV, 50Hz distribution network systems, and is widely used in urban power grid construction and renovation projects, industrial and mining enterprises, high-rise buildings, and public facilities.

Get A Quote

Overview

Model And Meaning

HXGN -12 Fixed type metal ring main switc (1)

Features

As a ring main power supply unit and terminal equipment, it plays a role in energy distribution, control, and protection of electrical equipment. It can also be installed in box substations. This ring main unit is equipped with a compressed air load switch and a vacuum load switch. The operating mechanism is a spring operated mechanism, which can be operated manually or electrically. Alternatively, it can be equipped with isolation switches and VS1 fixed circuit breakers. This ring main unit has strong integrity, small size, no fire and explosion hazards, and reliable “five prevention” functions.

The ring main unit is equipped with FZRN25-12D switch, FKRN12A-12D switch, GN30-12 switch, and VS1 fixed circuit breaker.

The load switch, isolation switch, VS1 circuit breaker, and cabinet door have complete and reliable mechanical linkAge and interlocking devices, which can effectively prevent misoperation and ensure safe maintenance.

The switch can be manually and electrically operated.

The cabinet door and instrument door of measurement cabinet are equipped with lead sealing pins.

The fuse combination electrical cabinet and fuse tube are equipped with striker pins. In the case of a short circuit, the striker impacts the tripping mechanism, achieving fast switching and effectively protecting electrical equipment; The ring main unit adopts front operation and reliable wall installation.

Power transmission operation: Only when the cabinet door is closed and locked, and the earthing switch is operated to the “open” position, that can the load switch be operated to the closed position.

Power outage operation: The earthing switch can only be closed when the load switch is in the opening position, and the cabinet door can only be opened when the earthing switch is in the closing position.

The isolation knife is reliably interlocked with the circuit breaker and is interlocked with the door, fully meeting the five prevention requirements.

Installation conditions

Altitude: ≤ 1000m;

Environment temperature: The upper limit of the ambient air temperature is+40℃ , and the lower limit is -15℃ ;

Relative humidity: The daily average value shall not exceed 95%, and the monthly average value shall not exceed 90%;

Installation site: A place without conductive dust, corrosive gases, and water vapor; Places without fire and explosion hazards; Places without frequent severe vibration.

Note: When the normal usage conditions mentioned above cannot meet the usage requirements, the user shall negotiate with the manufacturer.

Technial Parameters

NO.	Item		Unit	Technical parameter
1	Rated voltage		kV	12
2	Rated current	Load switch cabinet	A	630
2	Rated current	Combined electrical cabinet	A	125
3	Rated short-circuit making current (peak value)		KA	50
4	Rated short-circuit breaking current (combined electrical cabinet)		KA	31.5
5	Rated Active load breaking current		A	630
6	4S thermal stability current		KA	20
7	Rated dynamic stable current (peak value)		KA	50
8	1min power frequency withstand voltage		kV	42 (Disconnect port, 48)
9	Lightning impulse withstand voltage		kV	75 (Disconnect port, 85)
10	Mechanical life		Times	5000
11	Rated transfer current (combined electrical appliance)		A	1700
12	Operation mode			Manual or electric
13	Protection level			IP3X

Primary wire Scheme

Scheme No.			01			02			03			04			05			06
Circuit name			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable outgoing
Primary wiring scheme
Cab inet size	W* D*H (mm)	W	450~1000			650~1000			650~1000			650~1000			800~1000			650~1000
		D	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000
		H	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200
	Dimension remarks		Width size 50 gears
Main electrical components	Vacuum load switch	Optional				FZN25-12/ T630-20			FZN25-12/ T630-20			FZN25-12/ T630-20			FZN25-12/ T630-20			FZRN25-12D/ T200- 31.5
	Compressor load switch					FKN12A-12/ T630- 20			FKN12A-12/ T630- 20			FKN12A-12/ T630- 20			FKN12A-12/ T630- 20			FKRN12A-12D/ T125-31.5
	Current transformer								LZZBJ9-10						LZZBJ9-10			LZZBJ9-10
	Voltage transformer											JDZ(X)10-10			JDZ(X)10-10
	High voltage fuse											XRNP-12/0.5A			XRNP-12/0.5A			XRNT-12
	Lightning arrester		HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50
	Charged display		DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)
Remarks			When installing the load switch, the minimum cabinet width is 950mm

Scheme No.			07			08			09			10			11			12
Circuit name			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable Incoming and outgoing lines			Cable outgoing
Primary wiring scheme
Cabinet size	W* D*H (mm)	W	650~1000			650~1000			650~1000			650~1000			800~1000			650~1000
		D	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000
		H	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200
	Dimension remarks		Width size 50 gears			1.When the incoming cable is directly pulled to the bus bar compartment for overlap, the cabinet width is 850;												Width size 50 gears
						2. When the incoming cable is overlapped in the cable room, the minimum size of the cabinet width is 650.
Main electrical components	Vacuum load switch	Optional				FZRN25-12D/ T200- 31.5			FZRN25-12D/ T200- 31.5			FZRN25-12D/ T200- 31.5			FZRN25-12D/ T200- 31.5			FZRN25-12D/ T200- 31.5
	Compressor load switch					FKRN12A-12D/ T125-31.5			FKRN12A-12D/ T125-31.5			FKRN12A-12D/ T125-31.5			FKRN12A-12D/ T125-31.5			FKRN12A-12D/ T125-31.5
	Current transformer								LZZBJ9-10						LZZBJ9-10			LZZBJ9-10
	Voltage transformer																	JDZ(X)10-10
	High voltage fuse
	Lightning arrester		XRNT-12			XRNT-12			XRNT-12			XRNT-12			XRNT-12			XRNP-12/0.5A
	Charged display		DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)
Remarks			When installing the load switch, the minimum cabinet width is 950mm

Scheme No.			13			14			15			16			17			18
Circuit name			Metering			Metering			Overhead cable incoming line			Overhead cable incoming line			Overhead cable incoming line			Overhead cable incoming line
Primary wiring scheme
Cabinet size	W* D*H (mm)	W	650~1000			650~1000			650~1000			650~1000			800~1000			650~1000
		D	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000
		H	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200
	Dimension remarks		Width size 50 gears
Main electrical components	Vacuum load switch	Optional							FZN25-12/ T630-20			FZRN25-12D/ T200-31.5			FZN25-12/ T630-20			FZRN25-12D/ T200-31.5
	Compressor load switch								FKN12A-12/ T630-20			FKRN12A-12D/ T125-31.5			FKN12A-12/ T630-20			FKRN12A-12D/ T125-31.5
	Current transformer		LZZBJ9-10			LZZBJ9-10									LZZBJ9-10			LZZBJ9-10
	Voltage transformer		JDZ(X)10-10			JDZ(X)10-10
	High voltage fuse		XRNP-12/0.5A			XRNP-12/0.5A						XRNT-12						XRNT-12
	Lightning arrester					HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50
	Charged display		DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)
Remarks			Note : When installing the load switch, the minimum cabinet width is 950mm

Scheme No.			19			20			21			22			23			24
Circuit name			liaison			liaison			liaison			liaison			liaison			liaison
Primary wiring scheme
Cabinet size	W* D*H (mm)	W	650~1000			650~1000			650~1000			650~1000			800~1000			650~1000
		D	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000	900	950	1000
		H	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200	1900	2000	2200
ze	Dimension remarks		Width size 50 gears
Main electrical components ctric a l co mp one nts	Vacuum load switch	Optional	FZN25-12/ T630-20			FZRN25-12D/ T200-31.5			FZN25-12/ T630-20			FZRN25-12D/ T200-31.5			FZN25-12/ T630-20			FZN25-12/ T630-20
	Compressor load switch		FKN12A-12/ T630-20			FKRN12A-12D/ T125-31.5			FKN12A-12/ T630-20			FKRN12A-12D/ T125-31.5			FKN12A-12/ T630-20			FKN12A-12/ T630-20
	Current transformer								LZZBJ9-10			LZZBJ9-10						LZZBJ9-10
	Voltage transformer														JDZ(X)10-10			JDZ(X)10-10
	High voltage fuse														XRNP-12/0.5A			XRNP-12/0.5A
	Lightning arrester		HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50			HY5WS-17/50
	Charged display		DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)			DXN-10Q/T(Q)
Remarks			When installing the load switch, the minimum cabinet width is 950mm