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DFWK-12 series Outdoor Ring Main Unit
The DFW10-12 Outdoor High-Voltage Cable Branch Box (hereinafter referred to as the Cable Branch Box) is a high-voltage electrical device with a rated voltage of 12kV, available in both standard cable tap-off box and SF6 ring main unit load switch-equipped versions.
It is designed for 50Hz three-phase AC power systems with a rated voltage of 12kV, primarily used at cable tap points in distribution networks as an independent outdoor high-voltage device for connecting, switching, and distributing electrical energy. This series is widely deployed in urban industrial zones, residential communities, commercial centers, airports, as well as large enterprises in the steel, petroleum, and chemical industries, and in various power distribution scenarios. It effectively reduces investment in electrical equipment and cables while significantly improving power supply reliability.
Compliance with International Standards
The Cable Branch Box complies with the following international standards:
IEC 62271-103 AC High-Voltage Load Switches, Fuse Combinations, and Switch-Fuse Combinations for Rated Voltages Above 1 kV up to 52 kV
IEC 60840 Power Cable Accessories for Rated Voltages from 18 kV up to 500 kV – Test Methods and Requirements
IEC 60071-1 Insulation Coordination for Equipment Within Low-Voltage Systems
IEC 60099-4 Metal-Oxide Surge Arresters Without Gaps for AC Systems
IEC 60529 Degrees of Protection Provided by Enclosures (IP Code)
Key Features
1. High Insulation Level & Robust Switching Capacity
Cable joints are safe to touch even when energized, ensuring reliable operation.
2. Flexible Functional Configuration
Supports multi-circuit power distribution and can be fitted with ZnO surge arresters, fault indicators, and live line indicators.
3. Superior Protection & Durability
The enclosure can be constructed from stainless steel, offering excellent resistance to rust, earthquakes, flooding, and pollution. It is maintenance-free and highly reliable.
4. Compact & Easy Installation
Small footprint, simplified wiring, and flexible inlet/outlet configurations for quick deployment.
Operating Environment Requirements
a. Altitude: ≤ 2000mb. Ambient temperature: -40℃ ~ +45℃ (15℃ ~ +45℃ when equipped with an SF6 load switch)c. Relative humidity: Daily average ≤ 95%, monthly average ≤ 90%d. Seismic intensity: ≤ 8 degreese. Wind speed: ≤ 35m/sf. No frequent severe vibration, no flammable or explosive gases, and no corrosive gases that damage metals or insulation.
Frequently Asked Questions (FAQ)
• Can the DFWK unit be directly installed outdoors without shelter?
Yes. It features a weatherproof IP54/IP65 cabinet with corrosion-resistant coating.
• Does it support SCADA integration?
Absolutely. It can be equipped with FTU/RTU for real-time remote monitoring and control.
• Is SF6 the only insulation option?
No. Upon request, dry air or eco-gas can be used for green energy applications.
• What’s the service life?
With over 25 years of proper operation and minimal maintenance.
• What testing standards does it comply with?
Fully compliant with IEC 62271-200 and GB/T 3906 standards.
Explore More Ring Main Units
Looking for other models or indoor options? Visit our Ring Main Unit Series for complete product offerings including XGN and HGGN types.
About the Manufacturer
Wei Shoe Electric Co., Ltd. is a trusted manufacturer of medium and high-voltage electrical equipment. Our RMU, VCB, and transformer solutions are widely adopted across energy, infrastructure, and industrial sectors in 20+ countries. All products are tested to international standards with full factory QA reports.
Author: Thor, Electrical Engineer, Wei Shoe Elec
📞 Phone: 86-0577-62788197
💬 WhatsApp: +86 159 5777 0984
📩 Email: [email protected]
