MEMU

NRTs SF6 gas insulated ring main unit

Main features of the product

The core unit (gas box) adopts 304 stainless steel and laser static sealing welding technology, making its protection level as high as IP67

Using SF6 as insulation and arc extinguishing medium, easy to expand on site

The main busbar connection method can be selected as top expansion or side expansion, which is easy to install and expand

Complete logic and mechanical interlocking system, integrated with mechanical switch position indication and panel simulation diagram

Fully insulated, fully shielded, plug-in cable, maintenance free, easy to install

Improve the reliable "five prevention" interlocking function and configuration

Technical parameter


Serial numberNameUnitMain technical parameters
1 Rated insulation voltage Rated voltagekV12
 Rated short-time power frequency withstand voltage
 -Alternating, relative to each otherkV42
 -Isolation fracturekV48
 Rated impulse withstand voltage
 -Alternating, relative to each otherkV75(95)
 -Isolation fracturekV85(110)
2 Protection level ShellIP41
Inflatable compartmentIP67
3 Rated current a bus or bus barA630 (maximum 1250)
4 Rated frequencyHz50/60
5 Internal arcingkA / s25/1
6Annual gas leakage rate
≤0.01
7 Pressure of inflatable compartmentMpa0.045
8 Electromagnetic Compatibility (EMC)Level 3
9 Mechanical lifespan Load switch10000
 Grounding switch5000







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