High Voltage Fixed AC Metal Enclosed Switchgear

The High Voltage Fixed AC Metal Enclosed Switchgear (Model: XGN66-12) is a indoor, air-insulated complete set of switchgear. It is designed for three-phase AC 50/60Hz power systems operating at rated voltages of 3.6kV, 7.2kV, and 12kV.

Unlike drawable variants, this Fixed AC Metal Enclosed Switchgear utilizes a fixed-mounted vacuum circuit breaker and a structured isolation system. This design philosophy simplifies the main circuit connections, enhances mechanical stability, and provides a cost-effective solution without compromising on safety. The enclosure is manufactured from high-strength cold-rolled steel plates, welded and bolted to form a robust structure that resists deformation during transport and operation. It serves as the critical interface for receiving electrical energy from the grid and distributing it to transformers, motors, and other high-voltage loads, offering integrated control, metering, and protection functions in a single, compact footprint.

Product Feature and Application

Key Features (Q&A Style)

Q: What makes the "Fixed" design of this High Voltage Fixed AC Metal Enclosed Switchgear better than withdrawable types?

A: Simplicity and Strength. Because the main components are fixed, the primary circuit connections are more robust and less prone to the contact wear issues associated with moving handcarts. This design allows for a smaller cabinet volume (nearly 50% smaller than traditional designs ), making it perfect for space-limited indoor substations. It also generally offers a lower initial procurement cost while maintaining a "five-proof" interlocking mechanism to prevent misoperation .

Q: How does Lugao Power ensure the safety of operating personnel?

A: Safety is embedded in the mechanics. The switchgear is equipped with a compulsory mechanical locking system between the main switch, disconnector, and cabinet doors. The High Voltage Fixed AC Metal Enclosed Switchgear features a visible breaking point (isolating switch), allowing operators to visually confirm the power is off before maintenance, complying with global electrical safety standards. Furthermore, components like the GN30-12 disconnector are fully enclosed to prevent arc flash exposure .

Q: In which environments can this product be used?

A: This product is designed for harsh industrial environments. It operates reliably in temperatures ranging from -25°C to +40°C and altitudes up to 1000m (customizable for higher altitudes). It is widely used in:

1. Power Plants & Substations: As the main incoming/outgoing unit.

2. Industrial & Mining Enterprises: For controlling heavy machinery and transformers.

3. High-rise Buildings: For power distribution rooms in basements or technical floors.

4. Renewable Energy: As a synchronization point for wind or solar farms.

Q: Does this High Voltage Fixed AC Metal Enclosed Switchgear support easy maintenance?

A: Absolutely. Despite being "fixed," maintenance is straightforward. The front panel allows easy access to the circuit breaker compartment, and the busbar chamber is isolated at the top. The fuse replacement (in fuse combinations) is simple and safe .

Production Details & Quality Assurance

Technical Craftsmanship

● Advanced Manufacturing: The metal enclosure is processed using CNC punching, bending, and shearing machines, ensuring high precision and inter-changeability. The frame is assembled with high-strength bolts, eliminating welding deformation .

● Insulation Performance: The system uses air as the primary insulating medium. However, through optimized busbar phase spacing and the use of high-creepage insulators, the High Voltage Fixed AC Metal Enclosed Switchgear easily passes the 42kV power frequency withstand voltage test.

● Interlocking Mechanism: We utilize a reliable "five-prevention" interlock system:

1. Prevents closing of the breaker if the earthing switch is closed.

2. Prevents closing of the earthing switch if the breaker is closed.

3. Prevents opening of the front/rear panels if the breaker is live.

Certifications

● Lugao Power Co., Ltd. adheres to strict international guidelines. Our XGN66-12 series is fully type-tested and complies with IEC 62271-200 (AC metal-enclosed switchgear and controlgear) . We also hold ISO 9001 certifications for our production facility, ensuring consistent quality.

Product Parameter (Specification)

Selecting the correct rating is critical. For a 1000kVA transformer at 12kV, we recommend a 630A rated current with a 25kA short-time withstand capacity to handle potential fault currents effectively. Consult our engineers for load-specific calculations.

Why Choose Lugao Power Co., Ltd.?

Proven Export Expertise: With over 500 units successfully deployed in the Philippines, Vietnam, Saudi Arabia, and Nigeria over the past 5 years, our packaging solutions (incl. reinforced steel crates and VCI anti-corrosion film) are battle-tested for long-distance sea freight and humid port storage.

Real Customization: Beyond RAL color matching, we provide tailored CT/VT ratios and auxiliary contact configurations to fit your existing protection relay schemes (ABB/Siemens/Schneider compatible).

Agile Supply Chain: Leveraging our local component ecosystem, we guarantee a 15-20 day lead time, significantly faster than European counterparts, without sacrificing the quality of key components (VS1/ZN63 vacuum interrupters).

After-Sales Response

Hotline: Technical queries answered within 2 hours (24/7).

Spares Logistics: Critical spare parts shipped via DHL/FedEx within 48 hours.

Digital Documentation: We provide full English wiring diagrams, SLDs, and operation manuals via a cloud link prior to vessel departure, enabling your site team to prepare in advance.