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Introduction
When it comes to ensuring safety, efficiency, and space-saving design in medium-voltage applications, the Air-12T630-25 Gas-Insulated Switchgear stands out as a trusted choice. Tailored for today’s high-demand electrical infrastructure, this Gas-Insulated Switchgear offers reliable performance with minimal maintenance and maximum operator safety.
Engineered with precision, the Air-12T630-25 combines compact structure with durable materials and advanced insulation systems. It is ideal for power distribution in urban substations, industrial plants, and commercial complexes. Unlike air-insulated alternatives, gas-insulated technology allows for enhanced dielectric strength and operational longevity.
Why Choose Gas-Insulated Switchgear?
Gas-Insulated Switchgear, often referred to as GIS, uses SF₆ gas as an insulating and arc-extinguishing medium. This provides several advantages:
- Reduced footprint compared to traditional switchgear
- Higher safety margins, especially in harsh environments
- Sealed structure minimizes dust and moisture ingress
- Extended service life and reduced maintenance cycles
The Air-12T630-25 model is a prime example of how Gas-Insulated Switchgear technology enhances electrical distribution in compact installations.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | Air-12T630-25 |
| Rated Voltage | 12kV |
| Rated Current | 630A |
| Rated Frequency | 50Hz |
| Short-Time Withstand Current | 25kA / 3s |
| Peak Withstand Current | 63kA |
| Insulation Medium | SF₆ Gas |
| Protection Degree | IP67 (sealed tank) |
| Operating Mechanism | Manual / Motorized |
| Operating Temperature | -25°C to +50°C |
| Relative Humidity | ≤95% |
| Installation Type | Indoor / Outdoor |
| Life Expectancy | >30 years |
| Standards Compliance | IEC 62271-200, GB3906 |
Design Overview
The Air-12T630-25 is a modular ring main unit enclosed in a stainless-steel sealed tank filled with SF₆ gas. All live parts are fully insulated, making the unit unaffected by environmental conditions such as humidity, dust, or salt spray.
- Compact cabinet width enables installation in confined spaces.
- Three-position switch (ON-OFF-EARTH) ensures secure operation.
- Optional remote control interface enables SCADA integration.
Whether deployed in a small substation or an industrial plant, this Gas-Insulated Switchgear delivers a consistent and safe power flow.
Performance Benefits
- Maintenance-Free Design
The sealed nature of the cabinet and SF₆ insulation ensures zero environmental interference and no need for internal maintenance over decades. - Environmental Resilience
Operates reliably in extreme cold, high-humidity zones, and dusty areas without performance degradation. - Operational Safety
Designed with mechanical interlocks and pressure relief devices to prevent accidents during maintenance or faults. - Automation-Ready
Optional smart grid support through remote monitoring, auto reclosers, and load break automation.
Use Case Scenarios
Air-12T630-25 Gas-Insulated Switchgear is commonly used in:
- Urban Underground Substations
- Factories and Manufacturing Facilities
- Infrastructure Projects (Tunnels, Airports)
- Renewable Energy Plants
- Metro and Railway Electrification
- Commercial Buildings and Smart Campuses
Its sealed design makes it ideal for harsh environments, and its modular layout simplifies future upgrades or extensions.
Practical Engineering Insights
Gas-insulated systems like the Air-12T630-25 require minimal space compared to air-insulated gear, making them the preferred choice in dense city networks or where underground vaults are used. The reduction in arc-flash risk and ease of SCADA integration positions it well for smart grid deployment.
Field data has shown that over a 25-year period, GIS solutions reduce downtime by more than 40% when compared to traditional setups.
Frequently Asked Questions (FAQ)
1. What makes Gas-Insulated Switchgear better for city networks?
Because it takes up less space and offers sealed protection against environmental factors, Gas-Insulated Switchgear like the Air-12T630-25 is perfect for underground or indoor substations where space and reliability are critical.
2. Can this model be used with automated systems?
Yes. The Air-12T630-25 Gas-Insulated Switchgear supports remote operation, automation-ready motor drives, and SCADA integration for intelligent grid functionality.
3. Is SF₆ gas safe for use in switchgear?
SF₆ is non-toxic, non-flammable, and chemically stable. It is used in a sealed tank and does not leak under normal operating conditions. Units are designed to comply with environmental standards and gas monitoring is optional.
