XGN66-12 Indoor High Voltage Switchgear RMU

The XGN66-12 Indoor High Voltage Switchgear RMU stands as a pinnacle of modern electrical engineering, meticulously crafted to transform your power distribution infrastructure. Upon close inspection, the precision-engineered, fully metal-enclosed chassis exudes a sense of rugged durability, characterized by its smooth, cold-rolled steel finish and seamless, non-welded assembly. When integrated into your facility, it operates with a silent, steadfast reliability that eliminates the anxiety of unexpected power interruptions. Designed to handle the rigorous demands of 3.6-12kV systems, this switchgear provides an unyielding backbone for industrial manufacturing plants, urban substations, and sprawling commercial complexes.

The tactile feedback of its robust mechanical interlocks reassures operators of its uncompromising safety standards, physically preventing any hazardous misoperations. By choosing this advanced RMU, facility managers and procurement specialists are not merely acquiring electrical equipment; they are investing in long-term operational continuity and peace of mind. The air-insulated interior is thoughtfully arranged to dissipate heat efficiently, ensuring that even under peak load conditions, the system remains cool, stable, and highly responsive. Ultimately, this switchgear bridges the gap between high-performance energy management and spatial economy, empowering your operations to scale without the heavy burden of excessive infrastructural expansion.

About ZISHENG ELECTRICAL

Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email [email protected].

From the initial technical consultation to the final on-site commissioning, our dedicated team acts as a seamless extension of your own engineering department.

Dedicated technical consultation to ensure the exact specification match for your unique grid architecture requirements.
Streamlined global logistics and robust, weather-proof packaging to guarantee equipment arrives in pristine, ready-to-install condition.
Highly accessible post-installation support to assist with maintenance scheduling, lifecycle management, and complex technical troubleshooting.

Parameter	Specification
Product Name	XGN66-12 Indoor High Voltage Switchgear RMU
Rated Voltage	12kV (Suitable for 3.6-12kV systems)
Rated Frequency	50Hz
Rated Current	630A, 1000A, 1250A, 2000A, 2500A, 3150A
Rated Short-Circuit Breaking Current	20kA, 31.5kA
Rated Short-Time Withstand Current (4s)	20kA, 31.5kA
Rated Peak Withstand Current	50kA, 80kA
1min Power Frequency Withstand Voltage	Phase-to-phase/to ground 42kV, Fracture 48kV
Lightning Impulse Withstand Voltage	Phase-to-phase/to ground 75kV, Fracture 85kV
Protection Level	IP2X
Insulation Type	Air-insulated
Equipment Structure	Box-type, Fixed, Fully metal-enclosed
Core Circuit Breaker	Standard VS1 Vacuum Circuit Breaker (Compatible with ZN28-12, VD4-12, etc.)
Busbar System	Single busbar / Single busbar sectioning
Applicable Standards	IEC298, GB3906, DL/T404, GB/T11022
Ambient Temperature	-25°C to +40°C
Altitude	≤1000m

The XGN66-12 is exceptionally versatile and rugged. Thanks to its robust air-insulated design and anti-corrosion CNC-machined chassis, it thrives in a wide array of demanding settings. It maintains highly stable operation in temperatures from -25°C to +40°C.

Ideal for space-constrained commercial complexes and underground urban substations.
Highly recommended for heavy industrial zones with severely fluctuating power loads.
Perfectly engineered for high-altitude installations up to 1000 meters above sea level.

Absolutely. While the unit comes standard with the highly reliable VS1 vacuum circuit breaker, the internal architecture is specifically designed for modular compatibility. This ensures you do not need to overhaul your entire maintenance inventory or retrain your staff.

Fully and seamlessly compatible with VD4-12 vacuum circuit breakers.
Easily integrates with traditional ZN28-12 models.
Customized mounting brackets and busbar connections can be arranged during the initial manufacturing phase.

The “five-prevention” system is a mandatory, heavy-duty mechanical safeguard that physically prevents operators from making critical, life-threatening errors. When you interact with the cabinet, the rigid tactile feedback of the locks ensures you simply cannot force an unsafe action.

Physically prevents closing the circuit breaker while under an active load.
Stops the dangerous mis-insertion or mis-extraction of the circuit breaker handcart.
Blocks the closing of the grounding switch when the system is still live.
Prevents the closing of the main circuit breaker when the grounding switch is currently engaged.
Denies physical entry to live high-voltage compartments, protecting against accidental electrocution.

The XGN66-12 is engineered from the ground up for minimal intervention, significantly reducing your ongoing OPEX. The ergonomic placement of the breaker room in the lower-middle section makes visual inspections and routine dusting incredibly straightforward and safe.

Annual visual inspection of the air insulation clearances and busbar connections.
Periodic cleaning and lubrication of the mechanical interlocking joints to ensure smooth operation.
Routine verification of the vacuum circuit breaker’s contact wear using standard diagnostic tools.
Simple thermal imaging scans of the cabinet exterior to ensure balanced load distribution.

Despite being 50% smaller than traditional bulky units, the thermal management is actually enhanced. The non-welded, precision-assembled cabinet features strategically designed internal ventilation pathways that allow natural convection to dissipate heat highly efficiently.

Spacious internal busbar routing specifically prevents dangerous heat concentration points.
The thick, cold-rolled steel construction acts as a highly effective, natural thermal sink.
Maintains completely safe operating temperatures even during continuous peak 3150A rated current loads.