ELN Sustainable Dry Air Insulated Ring Main Unit

The ELN-12 Series Air-Insulated Ring Main Unit (RMU) offers an advanced, eco-friendly solution for reliable power distribution. Built on the proven framework of the ELE-12 series, it utilizes dry air as an insulating medium, providing improved environmental sustainability and operational efficiency compared to traditional SF₆insulated RMUs. Ideal for use in urban, industrial, and commercial power networks, this air-insulated RMU minimizes environmental impact while delivering high performance and durability.

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Description

ELN Series Ring Main Unit Structure

ELN Series Ring Main Unit Features

Eco-Friendly
Utilizes dry air as the insulation medium, minimizing environmental impact.
Sealed Stainless Steel Chamber
Ensures long-term reliability by protecting components from external conditions.
Compact Design
Ideal for space-restricted installations.
Enhanced Durability
Builds on the robust ELE-12 framework for reliable performance.
Modular Flexibility
Adaptable to various distribution requirements.

Optional Unit

Specifications

Model	12kV Dry-air Insulated RMU
Model	Load Switch Cabinet	Circuit Breaker Cabinet	PT Isolator Cabinet
Rated Voltage	12kV
Rated Frequency	50Hz
Rated Current	630A
Rated Power Frequency Withstand Voltage (1min)	42/48kV
Rated Lightning Impulse Withstand Voltage (Peak Value)	75/85kV
Electrical Life	——	E2	——
Mechanical Life	10000	10000	5000
Rated Short-Circuit Breaking Current	——	20/31.5kA	——
Rated Closing Current (Peak)	50kA	50/80kA	50kA
Rated Peak Withstand Current of Main Circuit and Ground Circuit	50kA	50/80kA	50kA
Rated Short-Time Withstand Current of Ground Circuit (2s)	20kA	20/31.5kA	20kA
Rated Short-Time Withstand Current of Main Circuit (4s)	20kA	20/31.5kA	20kA
Internal Arc Classification (IAC class)	AFLR, 20kA, 1s
Rated Working Pressure (20°C Gauge)	0.02MPa
Minimum Working Pressure (20°C Gauge)	0.01MPa
Enclosure Ingress Protection Rating	IP4X
Gas Chamber Ingress Protection Rating	IP67
Annual Gas Leakage Rate	≤0.01%
Dimensions(WDH)(excluding door)	4208502000mm	420/6008502000mm	6008502000mm