RM6 Fully Enclosed and Fully Insulated Gas-Insulated Ring Network Switchgear

The RM6 gas-insulated ring main unit (RMU) complies with IEC 62271-200 for medium voltage secondary distribution networks. It integrates switching and protection functions for transformer connection in open ring or radial configurations. Rated up to 24 kV, 630 A busbar current, and 21 kA / 1 s short-circuit withstand. The stainless steel tank, internal arc classification up to 20 kA AFLR, and visible earthing contacts enhance operator safety. The flexible architecture supports LSC 2A, PM partition class, and scalable automation for future-ready distribution management.

product details

Type & Meaning

1	Model
2	Rated voltage (kV)
3	The name of the cabinet type
4	Cable in and out mode

Normal Operating Conditions

- Temperature: Maximum 40°C (24h average ≤35°C), minimum -25°C.
- Altitude: 12kV model up to 2000m; 24kV model up to 1000m. For higher altitudes, derating applies – consult us.
- Sunlight: Avoid direct exposure.
- Environment: Free from heavy dust, smoke, corrosive substances, flammable gases, vapor, and salt mist.
- Humidity: 24h average RH ≤95%, monthly average RH ≤90%; 24h vapor pressure ≤2.2kPa, monthly ≤1.8kPa.

While condensation is rare, it may occur under high humidity with sudden temperature changes. Proper ventilation and compliance with civil engineering standards are recommended to prevent insulation damage.

Product Features

- Enhanced Safety: Enclosed design minimizes exposure to live parts, reducing electrical shock risks; built-in protection mechanisms (e.g., arc fault containment) enhance operational safety.
- Reliable Performance: High-quality components ensure stable current control and fault interruption, suitable for continuous operation in harsh industrial environments.
- Flexible Configuration: Modular design allows customization based on voltage levels, load capacities, and application needs (e.g., indoor/outdoor installation).
- Easy Maintenance: Accessible compartments and standardized parts simplify inspection, repair, and component replacement, reducing downtime.
- Smart Integration: Modern switchgear supports remote monitoring and control via digital interfaces, enabling real-time data analysis and predictive maintenance for improved system efficiency.

product Display

Technical Parameters

Rated voltage		Ur	kV	12	17.5	24
Rated frequency		Fr	Hz	50 or 60	50 or 60	50 or 60
Insulation level
Industrial frequency 50Hz/1min	Phase-to-phase, phase-to-earth	Ud	kV rms	28	38	50
Industrial frequency 50Hz/1min	Across isolating distance	Ud	KV rms	32	45	60
Lightning impulse withstand	Phase-to-phase, phase-to-earth	Up	kV peak	75	95	125
Lightning impulse withstand	Across isolating distance	Up	kV peak	85	110	145
Rated current		Ir	A	630	630	400	400	630	630
Rated current busbars		Ir	A	630	630	400	400	630	630
Rated peak current		lp	kA	62.5	52.5	31.25	40	40	50
Short-time withstand current		It	kA rms	25	21	12.5	16	16	20
Short-time withstand current		tk	S	1	1 or 3	1	1	1	1 or 3
Breaking capacity	Active load	load	A	630	630	400	400	630	630
	Earth fault	lef1	A	320	320	320	320	320	320
	Cable charging	Icc	A	110	110	110	110	110	110
Making capacity of switch and earthing switches		Ima	kA peak	62.5	52.5	31.25	40	40	50
Bushing (1)			Type	C	C	B or C	B or C	C	C
Mechanical endurance	Switch disconrector	M1	Number of openings	1000	1000	1000
Mechanical endurance	Earthing switch	M0	Number of openings	1000	1000	1000
Electrical endurance	Switch disconrector	E3	Number of CO at rated current	100	100	100
	Switch disconrector	E3	Number of short-circuit making operations	5	5	5	5	5	2
	Earthing switch	E2	Number of short-circuit making operations	5	5	5	5	5	2

(1) No busing for IC function

Monitoring & Protection System

- Testing instrument: Convenient to observe, monitor, the value of current voltage.
- Industry Top Plug: Sealing is stronger, conductive performance good quality reliable safety.
- Three-phase transformer integrated: Three-phase unbalance current outflow and reflux interpolation detection, accurate and reliable detection protection performance.
- Zero sequence current transformer: Using the high accuracy zero sequence current transformer can make a full set of equipment protection function. Safe in operation.