insulated ring main unit
insulated ring main unit
insulated ring main unit
insulated ring main unit
insulated ring main unit

DQN Series N₂ Insulated Ring Main Unit

Model NO.
Technical Advantages:
1. Completely sealed and maintenance free throughout the service life
2. Compact structure and modular design
3. Advanced processing technology and good air tightness
4. Nitrogen has low leakage rate, high purity and service life of 40 years
5. Mechanical interlocking and electrical interlocking are used together
6. The control system is advanced and can realize unmanned
7. Closing method of grounding switch + vacuum circuit breaker combination
After introducing the international advanced technology, Leistung Energie researched DQN Series N2 Ring Main Unit (N2 insulation and vacuum extinction) based on several years’ design and manufacturing of gas insulated switchgear. The product adopts novelty design and advanced manufacturing technique. It represents energy-conversation, environmental protection philosophy for the production, usage and lifetime. This product is with the character of small dimension, free maintenance, simple operation, high performance indication, safety and reliability, which can replace SF6 RMU and solid insulation switchgear. It’ s green energy saving product for power grid construction and upgrading.
For more details, please call customer service for consultation.
● Altitude: ≤ 2000m (special tailor-made switchgear for over 2000m)
● Max temperature: + 60 ℃
● Min temperature: -40 ℃
● Sunlight intensity : 0.1W/cm2 (wind speed : 0.5m/s)
● Max daily range of temperature: 25K
● Indoor relative humidity: daily average value ≤ 95%, month average value ≤ 90%
● Maximum wind velocity: 35m / s (Note: wind energy means the average wind velocity above the ground in 10 minutes)
● Load: With 10mm icing and 17.5m/s wind speed
● Aseismatic Performance: safety factor is no less than 1.67 at the two-ay interaction of horizontal acceleration 0.2g and vertical acceleration 0.1g with the method of resonance, sin and beat-wave.
● Induced electromagnetic interference in the secondary system is no more than 1.6KV.

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