24kV Solid Insulated Ring Main Unit

VOLNAI, a reputable supplier based in China, specializes in providing high quality 24kV Solid Insulated Ring Main Unit for efficient and reliable electrical distribution solutions. GTXGN □-12 solid insulated ring main unit is a new generation of environmental protection type composite insulation ring main unit developed by our company. It’s mainly composed of three parts,namely V unit (circuit breaker unit), C unit (load switch unit), F unit (combination unit), each unit can be used alone or can also be freely extented, its structure is divided into intelligent control instrument room,operating mechanism and primary part, the instrument room can match the microcomputer protection (controller), it uses spring operation mechanism, and the primary part adopts automatic gel process of APG, the isolating switch and the arc-extinguishing chamber are completely enclosed in the epoxy resin, and a special joint is used to connect bus.

The arc-extinguishing chamber adopts special copper and chrome contact material—type R longitudinal magnetic field contact, and complete one-time sealing process. The short circuit current breaking capacity and stability, electrical life, temperature rise and insulation level of this arc-extinguishing chamber are (copper and aluminum contact material, cup-shape longitudinal magnetic field contact structure,and incomplete one-time sealing process) was obviously improved compared with previous one. The operation mechanism adopts the elastic operation mechanism which is integrated with the switch, that is, the isolation switch and the main switch elastic operation mechanism are integrated, which can conveniently realize the interlock,and the mechanism parts are less,reducing the unnecessary transmission links with high reliability,and electrical operation can be installed according to the needs of users.

Solid insulated fully enclosed switchgear: It adopts solid insulating material as the main insulating medium and conductive connection. After the isolation switch,grounding switch, main bus, branch bus and other dominant electrical circuits are single or combined, the solid insulating medium is wrapped and packaged into one or several modules with certain functions, which can be recombined or expanded with full insulation and full sealing performance. The three-station mechanism can open and close the load current, and can also realize manual and electric operation.

Service condition

● Ambient temperature: -45℃+45℃

● Humidity: the maximum average relative average ≤95%, monthly average ≤90%

● Altitude: ≤4000 meters

● Seismic capacity: 8 degrees

● Protection grade: IP67 for electrified body fuse tube, IP3X switch cabinet shell

Executive standard

GTXGN □-12

Solid Insulated Ring Main Unit

● IEC 62271-1-2017 High-voltage switchgear and control gear-part 1: Common specifications

● IEC 620071-200-2003 High-voltage switchgear and control gear-part 200: AC metal-enclosed switchgear and control gear for rated voltages above 1kV and up to and including 52kV

● GB3906-2006 Alternating-current metal-enclosed switchgear and control gear for rated voltage above 3.6kV and up to and including 40.5kV

● GB/T11022-2011 Common specifications for high-voltage switchgear and control gear standards

● GB1984-2014 High-voltage alternating-current circuit breakers

● GB1985-2014 High-voltage alternating-current disconnectors and earthing switches

● GB3804-2017 High-voltage alternating-current switches for rated voltage above 3.6 kV and less than 40.5 kV

● DL/T404-2018 Alternating-current metal-enclosed switchgear and control gear for rated voltages above 3.6kV and up to and including 40.5kV

● Q/GDW730-2012 Specifications for 12kV Solid-insulated ring main units

Technical parameter

Switchgear technical parameter

Safety and environmental protection

Environment protection

Outline size