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Product Introduction
The GA Series Compact RMU is a state-of-the-art SF6 gas-insulated metal-enclosed switchgear. Designed for versatility, it consists of modular units including load switches, fuse-combination units, vacuum circuit breakers, and busbar incoming modules. Utilizing advanced materials, the GA series offers superior electrical and mechanical performance, remaining unaffected by climate or environmental fluctuations.
Key Features & Operational Safety
We prioritize user safety through an integrated design that meets strict “Five-Prevention” mechanical interlocking requirements:
- Integrated Three-Position Switch: Clear “Close, Open, and Earth” positions to prevent misoperation.
- Fully Sealed Primary Side: Protects against accidental contact and external contaminants.
- Live Display System: Provides real-time voltage indication for incoming and outgoing lines.
- Pressure Relief System: Equipped with explosion-proof diaphragms that release pressure safely from the bottom or rear if internal pressure exceeds limits.
Advanced Design & Engineering Specifications
1. High-Security Interlocking & Monitoring
- Safety Interlocking Mechanism: The internal mechanical interlock prevents accidental misoperation. Access to the cable compartment is strictly restricted unless the switch is in the “Grounded” state. External locking options are available for multi-level security.
- Auxiliary Switches: Both load and grounding switches can be equipped with auxiliary switches to provide real-time, synchronous feedback of the switch position status.
2. Specialized Fuse Protection System
The GA series features an innovative fuse design where the fuse is housed in an insulating tube within the SF6 gas chamber.
- Optimized Electric Field: Fuse covers are strategically placed in the weakest part of the electric field to ensure stability.
- Total Protection: Being enclosed in SF6 gas means no conductive materials or environmental pollutants can adhere to the fuse assembly.
- Phase-Failure Protection: The system includes a linkage tripping device. If any phase fuse blows, all three phases of the load switch disconnect automatically, preventing single-phasing faults.
3. Environmental Resilience & Durability
- Extreme Temperature Range: Certified for stable operation in environments ranging from -40°C to +50°C.
- Maintenance-Free Enclosure: All 10kV live components are sealed in a high-grade stainless steel SF6 gas chamber, protecting them from moisture, dust, and corrosive gases.
- Corrosion Resistance: The frame is constructed from galvanized sheet metal with an electrostatic spray coating, ensuring long-term structural integrity.
4. Standard Compliance & Certifications
The GA series has passed rigorous testing by the Electrical Equipment Quality Inspection and Testing Center. It fully complies with the following international standards:
- IEC Standards: IEC 60694, IEC 60265, IEC 60420, IEC 60056, IEC 60298, IEC 60129.
- GB Standards: GB/T11022.
5. Aesthetic & Protective Coatings
The switchgear features a professional finish using high-quality electrostatic spraying:
- Operating Panel: RAL7035 (Light Grey/White)
- Cable Compartment Door: RAL7035 (Light Grey/White)
- Switch Side Panels: RAL7035 (Light Grey/White)
Reliable Performance in Extreme Conditions
- Maintenance-Free Design: All 10kV-24kV live parts are sealed in a 3mm stainless steel gas tank, protecting them from dust, moisture, and small animals.
- Corrosion Resistance: The outer cabinet is made of galvanized steel with an electrostatic spray coating for maximum durability.
- Long Service Life: Designed as a “Sealed Pressure System” with an operational lifespan of over 20 years.
- Real-time Monitoring: Built-in pressure gauges monitor SF6 gas levels (normal range 0.15~0.4 bar).
Technical Specifications
