12KV Ring Main Unit Switchgear Panel

12KV Ring Main Unit Switchgear Panel manufactured by Liugao.The HXGN15-12 metal-clad ring main unit switchgear, of the intelligent type, is designed for application in a three-phase AC system with a rated voltage of 12kV, a rated frequency of 50Hz, and a rated current of 630A.It serves the purpose of ring network electricity supply and radiation terminal power supply, particularly in cable line sectionalizing and branch connection scenarios.The switchgear is equipped with an SF6 gas insulating multiloop power unit and a feeder terminal device (FTU) imported from Korea.Notably, it features advanced functions such as remote signaling, telemetry, remote control, and fault current detection.Primarily utilized as a distribution automation system, it proves beneficial for city power supply load centers and cable supply applications.

Send Inquiry

Product Description

Liugao, a leading high voltage switchgear supplier,The cabinet framework is of an assembly type, offering stability, reliability, and convenient assembly. It is versatile enough to configure as a ring net unit and supports various connection modes.

Compact in size, lightweight, with a small footprint, and easy to install, the ring main unit prioritizes efficiency and simplicity in its design.

The unit features separate barbar, switch, and control rooms, each maintained in a secure state. Both the cabinet and its components are meticulously grounded to ensure the personal safety of operators and maintenance workers.

The ring main unit is compatible with FN12-12D and FN25-12D load switches, providing flexibility and adaptability in its configuration.

With an advanced and reliable mechanical interlock system, the unit meets the stringent requirements of five-anti protection, ensuring enhanced safety and security in its operation.

12KV Ring Main Unit Switchgear Panel Operating Environment

1. Air temperature: Maximum temperature: +40℃; Minimum temperature:-35℃

2. Humidity: Monthly average humidity 95%; Daily average humidity 90% .

3. Altitude above sea level: Maximum installation altitude: 2500m

4. Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.

5. No frequent violent shake.

12KV Ring Main Unit Switchgear Panel Characteristics

The enclosure, door, and upper chamber of this unit undergo a thorough spray processing, ensuring a protective and uniform finish. All cabinets feature a main grounding busbar that facilitates a close connection near the cabinet. Metal components, including grounding switches and interlocking parts, are meticulously linked to the grounding busbar. Copper braid connections are employed between parts connected by screws to ensure continuity.

To manage gas release and prevent inner burning arcs, a pressure relief door is positioned at the back of the cabinet. The upper board is securely fixed with screws, allowing it to be easily opened from the outside for bus connection. The upper auxiliary devices chamber offers flexibility for installing terminals and other components. By elevating the small chamber, relay protection can be efficiently achieved.

Notably, the load break switch and grounding switch utilize a block-type interlock, while the grounding switch and door employ a coercive interlock. Following a specific sequence of steps—closing the door, turning on the grounding switch, and closing the load break switch—automatic interlock is achieved. This sequential operation serves to prevent faults and enhance the overall safety of the system.

12KV Ring Main Unit Switchgear Panel Specification

No.	Item		Unit	Parameter
1	Maximum system voltage		kV	12	15	24	40.5
1	Rated voltage		kV	7.2、11	13.8、15	17.5、20、22	30、33、36
2	Rated current		A	630/1250
3	Rated frequency		Hz	50/60
4	1min Power frequency withstand voltage	Phase to phase, phase to earth	kV	42	48	55	85
		Fracture	kV	48	55	65	95
5	Lightning impulse withstand voltage	Phase to phase, phase to earth	kV	75	90	125/150	170
		Fracture	kV	85	105	150/160	185
6	Short time withstand current	Main circuit	kA	25/2s
		Earthing circuit	kA	25/2s
7	Rated withstand current (peak)		kA	63			50
8	Rated transferring current		A	1300-1700
9	Rated load circuit making current		A	630
10	Rated cable(line) charging breaking current		A	Oct-50
11	No load transformer breaking current		A	20
12	Cable charge breaking current in earthing fault		A	100			80
13	Rated short circuit breaking current (peak)		kA	20
14	Rated short circuit making current (peak)		kA	63			50
15	Protection level			IP4X
16	Load break switch life		times	5000
17	Earthing switch life		times	5000