ELE-12/24 kV SF₆ Insulated Ring Main Unit

The ELE Series SF₆ Gas-Insulated Ring Main Unit (RMU) is a compact, reliable power distribution solution designed for both urban and industrial environments. Featuring advanced SF₆ gas insulation, this unit ensures high reliability, maintenance-free operation, and seamless integration in space-constrained areas. Its sealed structure enhances safety and protects against external elements, making it ideal for mission-critical applications in smart grids, power stations, and substations.

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Description

ELE Series Ring Main Unit Structure

ELE Series Ring Main Unit Features

Sealed Stainless Steel Tank

Protects high-voltage components from external factors, ensuring long-term reliability.
Compact Design

Ideal for space-limited installations.
Modular Flexibility

Configurable for different distribution needs.

Helium Leak Detection (Gas Tank)

Guarantees a leakage rate of less than 0.05% per year with a service life exceeding 30 years.
High Durability

Mechanical life of up to 5,000 operations for load switches and 10,000 for vacuum circuit breakers.
Efficient Current Transfer

Handles up to 12kV, 1750A; 24kV, 1400A for load switch-fuse units.

Optional Unit

Specifications

Model	12kV SF₆ Insulated RMU			24kV SF₆ Insulated RMU
Model	Load Breaker Cabinet	Fuse Combination Switchgear	Circuit Breaker Panel	Load Breaker Cabinet	Fuse Combination Switchgear	Circuit Breaker Panel
Rated Voltage	12kV	12kV	12kV	24kV	24kV	24kV
Rated Frequency	50Hz	50Hz	50Hz	50Hz	50Hz	50Hz
Rated Current	630A	125A(Limited by High Voltage Fuses)	630/1250A	630A	125A(Limited by High Voltage Fuses)	630A
Rated Power Frequency Withstand Voltage(1min)	42/48kV	42/48kV	42/48kV	65/79kV	65/79kV	65/79kV
Rated Lightning Impulse Withstand Voltage (Peak Value)	75/85kV	75/85kV	75/85kV	125/145kV	125/145kV	125/145kV
Electrical Life	E3 Times	E3 Times	E2 Times	E3 Times	E3 Times	E2 Times
Mechanical Life	5000 Times	5000 Times	10000 Times	5000 Times	5000 Times	10000 Times
Rated Short-Circuit Breaking Current	——	31.5kA(Limited by High Voltage Fuses)	20/25/31.5kA	——	31.5kA(Limited by High Voltage Fuses)	20kA
Rated Closing Current (Peak)	50/63kA	80kA(Limited by High Voltage Fuses)	50/63/80kA	50kA	80kA(Limited by High Voltage Fuses)	50kA
Rated Transfer Current	——	1750A	——	——	1400A	——
Rated Peak Withstand Current of Main Circuit and Ground Circuit	50/63kA	——	50/63/80kA	50kA	——	50kA
Rated Short-Time Withstand Current of Ground Circuit (2s)	20/25kA	——	20/25/31.5kA	20kA	——	20kA
Rated Short-Time Withstand Current of Main Circuit (4s)	20/25kA	——	20/25/31.5kA	20kA	——	20kA
Dimensions(WDH)(excluding door)	3757501950/2050mm	4207501950/2050mm	420/500/6007501950/2050mm	3757501950/2050mm	4207501950/2050mm	4207501950/2050mm
Internal Arc Classification (IAC class)	AFLR,20kA,1s			AFLR,20kA,1s
Rated Working Pressure (20°C Gauge)	0.03MPa			0.03MPa
Minimum Working Pressure (20°C Gauge)	0.02MPa			0.02MPa
Enclosure Ingress Protection Rating	IP41			IP4X
Gas Chamber Ingress Protection Rating	IP67			IP67
Annual Gas Leakage Rate	≤0.01%			≤0.01%