1. Innovative Insulation & Maintenance-Free Design
Hermetic Sealing: All high-voltage live components are fully enclosed within a 3mm 304 stainless steel gas tank, shielding the switchgear from external elements like humidity, dust, and corrosive gases. This ensures continuous, reliable operation without the need for maintenance throughout its lifespan.
Eco-Friendly Insulation: Using nitrogen or dry air instead of traditional SF6 gas eliminates environmental risks associated with greenhouse gas emissions and leakage, making it a sustainable choice for modern power grids.
2. Premium Manufacturing & Quality Assurance
German-Engineered Precision: The gas tank is fabricated using state-of-the-art laser cutting and welding equipment from TRUMPF, Germany, ensuring superior airtightness and aesthetic appeal.
Stringent Leak Detection: Equipped with SEILER’s fully automated helium leak detection and gas filling systems, the RMU achieves an ultra-low leakage rate of ≤0.01% per year. The gas purity within the tank reaches 99.99%, extending the product’s service life to an impressive 40 years.
3. Flexible Modular Configuration
Customizable Design: Its modular architecture allows seamless assembly of single-gas-tank units or shared-tank configurations, adapting effortlessly to diverse power distribution requirements, from simple radial networks to complex grid setups.
4. Enhanced Safety & Intelligent Monitoring
Dual Interlock System: Integrated mechanical and electrical interlocks prevent malfunctions caused by incorrect operations, safeguarding both equipment and personnel.
Smart Automation: Advanced temperature-rise and density monitoring devices, combined with current-voltage monitoring systems, enable unattended substation operation and support “Five Remote Functions” (remote control, signaling, measurement, regulation, and fault recording).
Parameter | Unit | Value |
Rated Voltage | kV | 12 |
Rated Frequency | Hz | 50/60 |
Rated Current | A | 630 |
1min Power Frequency Withstand Voltage | kV | 42/48 |
Lightning Impulse Withstand Voltage | kV | 75/85 |
Gas Tank Protection Level | - | IP67 |
Enclosure Protection Level | - | IP4X |
Mechanical Life (Circuit Breaker/Load Switch) | Cycles | 10,000/10,000 |
Internal Arc Resistance | - | AFLR, 20kA, 0.5s |
Rated Gas Pressure (20°C, Gauge) | MPa | 0.02 |
Annual Gas Leakage Rate | %/Year | ≤0.01% |
Dimensions (Width x Depth x Height) | mm | 420/600 x 918 x 2150 |
· Urban Power Grids: Ideal for compact substations, underground cable networks, and urban distribution systems, optimizing space utilization while ensuring stable power supply in densely populated areas.
· Industrial Facilities: Suited for factories, manufacturing plants, and industrial load centers, providing reliable power distribution even in harsh, high-dust, or corrosive environments.
· Renewable Energy Projects: Facilitates seamless integration of solar, wind, and microgrid systems, enabling efficient power management and grid stability.
· Commercial & Residential Buildings: Perfect for high-rise buildings, outdoor switchgear stations, and prefabricated substations, ensuring safe and continuous power delivery for critical infrastructure.
Q1: What makes the DQN RMU environmentally friendly?
A1: The DQN RMU uses nitrogen or dry air instead of SF6 gas, eliminating greenhouse gas emissions and reducing environmental impact associated with gas leakage.
Q2: How often does the RMU need maintenance?
A2: The DQN RMU is designed for lifelong maintenance-free operation. Its hermetic sealing and high-quality components ensure stable performance without regular servicing.
Q3: Can the RMU operate in extreme weather conditions?
A3: Yes. With an IP67-rated gas tank and IP4X-rated outer shell, the RMU can withstand harsh environments, including high humidity, dust, and temperature fluctuations.
Q4: What safety features does the RMU have?
A4: The RMU features dual mechanical and electrical interlocks to prevent misoperation, along with advanced monitoring systems that detect abnormal conditions like temperature rises and gas density changes.
Q5: Does the DQN RMU comply with international standards?
A5: While meeting strict domestic quality requirements, the DQN RMU’s performance parameters align with global industry benchmarks, ensuring compatibility with international power projects.