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Home » Products » DR-6 / DT-6



DR-6 / DT-6: Ring Main Unit – GIS

SF6 insulated compact and extendable Ring Main Unit.

Design and construction

SGC – Switchgear Company has devoted significant human and financial resources in the development for the finalization of a new compact and/or extendable Ring Main Unit for voltages from 12, 17.5 and 24 kV.

Meeting the most stringent quality and climatic requirements, the production process of the new DR-6 product range happens in a totally new and modern machine park of the latest generation. Laser technology and additional equipments were purchased with the sole objective: a constant and reliable quality. The DR-6 range was developed and produced in accordance with the requirements of the ISO 9001 standards.

Security, reliability, respects for the environment characterizes the DR-6 range, of which a large number of components are recyclable.

Application

DR-6 medium voltage cubicles are used in a wide field of applications in the protection of transformers with a maximum capacity of 2500 kVA, regardless the configuration of the distribution network. Urban distribution, rural distribution, applications in renewable energy, SME’s, shopping centres, hospitals, etc. are belonging to the capabilities of the DR-6 range.

Technical Specifications

Rated voltage kV 12 17,5 24
General specifications
Impulse withstand voltage 1,2 / 50 μsec.
          To earth and between phases kV 75 95 125
          Over the insulation distance kV 85 110 145
Power frequency voltage test 1 min.
          To earth and between phases kV 28 38 50
          Over the insulation distance kV 32 45 60
Rated frequency Hz 50/60
Rated current A 630 400/630
Rated short time current 1 sec. kA 20 20 12,5/16/20
Rated peak value of the current k 50 50 40/50
Breaking capacity (IEC 62271-103) Class E3
          Rated current A 630 630 400/630
          Closed loop A 630 630 400/630
          No load cable A 30 30 30
          Earth leakage fault A 100 100 100
Internal arc 1 sec. IEC 62271-200 (5 criteria) kA 20 20 20
Degree of protection
          HV-compartment IP6X
          HLV- and cable compartment IP4X
Rated gas pressure at 20°C Bar 0,5 bar overpressure
Line Feeder
Rated current A 630 630 630
Rated short time current 1 sec. kA 20 20 12,5/16/20
Rated peak value of the current k 50 50 31,5/40/50
Number of makings 5
Transformer Feeder
Rated current A 200 200 200
Fuse switch
Short circuit breaking capacity (limited by the fuse) kA 25 25 16/20
Making capacity k 63 63 40/50
Circuit Breaker
Short circuit breaking capacity 1 sec. kA 25 20 25
Making capacity k 63 50 63

Any questions?

Feel free to contact us for more information!

Yun Wang
Yun WangPlant Manager
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brochure DR-6 / DT-6

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