Solid Insulated Ring Main Unit
  • Solid Insulated Ring Main UnitSolid Insulated Ring Main Unit

Solid Insulated Ring Main Unit

As a leading supplier in China, Keeya specializes in delivering cutting-edge solutions with its Solid Insulated Ring Main Unit. Our high-quality products exemplify reliability and efficiency in electrical distribution. With a commitment to excellence, Keeya stands as a trusted source for advanced ring main units, providing solutions that meet the evolving needs of the industry. Partner with us for top-notch products and services in the realm of solid insulated ring main units.

Model: GTXGN□-12

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Product Description

Keeya, a reputable supplier based in China, specializes in providing high quality solid insulated ring main units 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 Peld 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 Peld 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 controlgear-part 1: Common speciPcations

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

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

● GB/T11022-2011 Common specipcations for high-voltage switchgear and controlgear standards

● GB1984-2014 High-voltage alternating-currnet 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 controlgear for rated voltages above 3.6kV and up to and including 40.5kV

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


Technical parameter

Switchgear technical parameter

Item

Unit

Value

Rated voltage

KV

12

Rated frequency

Hz

50

Rated current

A

630

1250


Rated insulation level

Power frequency withstand voltage

Isolating distance

KV

48

Phase-phase

KV

42

Phase-earth

KV

42

Lightning impulse withstand voltage

Isolating distance

KV

85

Phase-phase

KV

75

Phase-earth

KV

75

(1s)Rated short circuit breaking current

KA

25

31.5

(4s)Rated short time withstand current

KA

25

31.5

(1p)Rated peak withstand current

KA

63

80

(1ma) Rated short circuit making current(peak)(1ma)

KA

63

80

Protection leve of enclosure


IP4X

Operation mode


Spring energy storage type


Safety and environmental protection

Isolating knife visual isolating distance

In front of the cabinet, there is an obvious visual window for the isolating distance, which can view the isolation ON position, isolation OFF position and grouding ON position. There are three working positions, which are convenient and safe for on-site staff to check and determine the location of the isolation knife.


Internal arcing design

Internal arcing pressure valve:when there is arcing inside the product,the pressure will be released from the pressure release valve and the arc will be discharged to the cable chute to avoid accidental injury to the operator.


Environment protection

Outline size

Model

Width(mm)

Depth(mm)

Height(mm)

Circuit breaker cabinet(V cabinet)

400

887

1450

Load switch cabinet(C cabinet)

400

887

1450

Fuse combination cabinet(F cabinet)

500

887

1450

)Metering cabinet(M cabinet)

750

887

1450

Lifting cabinet,direct connection cabinet(D cabinet)

400

887

1450

Voltage transformer cabinet(PT cabinet)

400

887

1450

Load switch lifting cabinet(SL cabinet)

800

887

1450

Circuit breaker lifting cabinet(SV cabinet)

800

887

1450






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