Smart SF6 RMU HXGN-12 | Gas Insulated Switchgear

Products
Ring Main Unit (RMU)
Smart SF6 Gas Insulated RMU

RING MAIN UNIT

Smart SF6 Gas Insulated RMU

Standards: IEC 62271-200:2011, IEC 62271-100:2008, IEC 62271-103:2011, IEC 62271-1:2007, IEC 62271-102:2018

The Smart SF6 Gas Insulated RMU completely seals all live components within the SF6 gas tank, achieving an IP67 protection level. This design ensures the entire switchgear is unaffected by the external environment, guaranteeing safe and reliable operation.

Primarily used as a ring main unit in power distribution networks or for power distribution to end-users, it is commonly found in prefabricated box-type substations, and switching stations.

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Technical Specifications

Component	Load Break Switch (Cabinet C)		Circuit Breaker (Cabinet V)		Switch-Fuse Combination (F)		Disconnector/Earthing Switch
Rated voltage (kV)	12	24	12	24	12	24	12	24
Rated current (A)	630		630		125		630
Arc extinction	SF₆ gas		Vacuum		SF₆ gas		SF₆ gas
Power-frequency withstand voltage (kV)	42	65	42	65	42	65	42	65
Lightning impulse withstand voltage (kV)	75	125	75	125	75	125	75	125
Rated short-circuit breaking current (kA)			20/25
Rated peak withstand current (kA)	50/63		50/63				50/63
Arc duration (s)	1		1		1
Mechanical life (times)	5,000		10,000 (spring) 30,000 (permanent magnet)		5,000		3,000
Filled pressure (SF6 gas)	0.04 Mpa (≈0.4 bar)
Annual leakage rate (SF6)	≤0.01 %
Internal arc classification	A (FLR)
IP class (gas tank/indoor/outdoor)	IP67/IP41/IP54

Features

Enhanced Safety:

Three-position load switch interlock with clear position indication and power distribution status display ensures operational safety.

Robust Arc Fault Protection:

Equipped with reliable pressure relief channels and an anti-arc fault design, successfully passing the internal arc type test.

Smart Grid Ready:

Optional integration of intelligent devices such as Distribution Terminal Units (DTUs) enables advanced smart grid functionalities.

Versatile Configuration:

Offers a range of configuration options including top and side cable outlets, high-voltage emergency power supply interfaces, secondary interface modules, and aviation plug connectors.

Customized Solutions:

Tailored design solutions are available to meet specific customer requirements and project needs.

Operating Conditions

Maximum Ambient Temperature: +60℃

Minimum Ambient Temperature: -40℃

Relative Humidity: daily average ≤95%, monthly average ≤90%

Seismic Grade: 8

Operating Altitude: ≤2000 meters above sea level

Note: Contact HCRT if a different condition is required. We offer customized solutions as well.