XGN66-12 Ring Main Unit – High Voltage Switchgear for 3.6–12kV Distribution Systems

Introduction to PINEELE XGN66-12 Ring Main Unit High Voltage Switchgear

The PINEELE XGN66-12 Ring Main Unit is a high-performance, metal-enclosed, fixed-type high voltage switchgear engineered for 3.6 to 12kV power distribution systems. Designed for use in two-phase AC 50Hz systems, this advanced Ring Main Unit (RMU) serves as a reliable solution for receiving and distributing electric energy in environments that require frequent operations.

Featuring a compact and aesthetic design, strong anti-misoperation mechanisms, and fully compliant with international and national standards (GB3906, DL404), the PINEELE XGN66-12 Ring Main Unit is ideal for both new installations and modernization of existing oil switchgear systems.

This switchgear integrates top-grade vacuum circuit breakers like VS1-12 or ZN28-12, combined with GN30-12 and GN19-10 disconnectors, and JN15-12 grounding switches, delivering optimal safety and electrical performance.

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Core Features of PINEELE XGN66-12 Ring Main Unit

✅ Designed for Medium and High Voltage Systems

• Compatible with 3.6kV, 7.2kV, and 12kV systems.
• Robust build to handle high-frequency operations and withstand extreme operating conditions.

✅ Modular Busbar Configuration

• Flexible busbar system supports single bus, single bus with bypass, or double bus layouts, ideal for scalable distribution networks.

✅ Advanced Vacuum Circuit Breaker Integration

• Equipped with VS1-12 or ZN28-12 vacuum circuit breakers.
• Isolation via GN30-12 or GN19-10 disconnectors.
• Grounding switch protection via JN15-12 grounding devices.

✅ Compact and Elegant Structure

• Streamlined, space-saving design with strong mechanical interlocks.
• Built-in anti-misoperation logic for operator safety.

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Technical Parameters Table

No.	Item	Unit	Technical Data
1	Rated voltage	kV	3.6 / 7.2 / 12
2	Rated current	A	630 / 1000 / 1250 / 2000 / 2500 / 3150
3	Rated short-circuit breaking current	kA	20 / 31.5 / 40
4	Rated short-time withstand current	kA	20 / 31.5 / 40
5	Rated peak withstand current	kA	50 / 80 / 100
6	Rated short-circuit making current	kA	50 / 80 / 100
7	Duration of short circuit	s	4
8	Degree of protection	—	IP2X
9	Bus system	—	Single bus, single bus with bypass, double bus
10	Operating method	—	Electromagnetic / Spring mechanism
11	Dimensions (W×D×H)	mm	950–1000 × 1000 × 2300 (≤1250A) 1000 × 1000 × 2300 (>1250A)

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Electrical Characteristics & Ratings

Parameter	Unit	Value
Rated Working Voltage	V	AC400–AC690
Rated Frequency	Hz	50 (60 optional)
Rated Insulation Voltage	V	660–800
1 min Power Frequency Voltage	kV	2500–3000
Control Motor Power	kW	0–155
Rated Short-Time Withstand Current	kA	15 / 30 / 50
Rated Peak Withstand Current	kA	30 / 63 / 105
Degree of Protection	—	IP30

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Environmental & Usage Conditions

The PINEELE XGN66-12 Ring Main Unit is engineered to perform reliably under challenging environmental conditions:

• 🌡️ Ambient Temperature: -15℃ to +40℃
• 🏔️ Altitude: ≤1000m
• 💧 Relative Humidity: Daily ≤95%, Monthly ≤90%
• 🌪️ Seismic Intensity: ≤8 magnitude
• 🚫 Operating Environments: Must be free of explosive gases, fire hazards, corrosive chemicals, and severe vibrations

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System Applications and Busbar Flexibility

This Ring Main Unit supports:

• Single Bus
• Single Bus with Bypass
• Double Bus Structures

Such flexibility makes it ideal for power substations, critical infrastructure, and smart energy grids where redundancy and scalability are essential.

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Advantages of Using PINEELE XGN66-12 Ring Main Unit

• ✅ Compliance with GB3906 and DL404 standards
• ✅ Full metal-enclosed structure with IP-rated compartments
• ✅ Integrated safety interlocks to prevent operational errors
• ✅ High voltage insulation with low maintenance vacuum breakers
• ✅ Scalable configurations suitable for future grid expansion
• ✅ Intelligent operation ready for automation and remote control systems

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Frequently Asked Questions (FAQs)

1. What makes the PINEELE XGN66-12 Ring Main Unit suitable for high-voltage environments?

The PINEELE Ring Main Unit is specially designed for 3.6–12kV systems, utilizing vacuum circuit breakers and robust insulation mechanisms. Its advanced structure, protection logic, and modular design allow it to perform consistently under high-voltage, high-load conditions with minimal maintenance.

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2. Can this Ring Main Unit be integrated with automated control systems?

Yes. The XGN66-12 RMU is built with options for electromagnetic and spring-stored energy mechanisms, making it fully compatible with automated smart grid systems, SCADA, and remote control infrastructure.

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3. What is the difference between this Ring Main Unit and gas-insulated RMUs?

While gas-insulated Ring Main Units (GIS) use SF₆ gas for insulation and arc quenching, the PINEELE XGN66-12 uses air insulation combined with vacuum circuit breaking technology, providing an environmentally friendly, cost-effective, and maintenance-simplified solution.

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Real-World Use Cases for PINEELE XGN66-12 RMU

The PINEELE XGN66-12 Ring Main Unit is the ideal choice for a wide variety of medium and high voltage distribution scenarios:

• 🏭 Industrial Manufacturing Plants
• 🌆 Urban and Rural Power Grids
• ⚡ Power Substations and Distribution Nodes
• 🏗️ Infrastructure Projects (railways, highways, tunnels)
• 🏢 Commercial Complexes and High-rise Buildings
• ☀️ Renewable Energy Integrations (solar, wind farms)
• 🏥 Hospitals and Emergency Power Systems
• 📡 Telecom Facilities and Data Centers