Gas insulated switchgear

High-quality GIS – gas insulated switchgear: DR-6/DT-6(+)

We manufacture durable switchgear based on safety and longevity

Looking for the distribution switchgear that meets all your requirements? “DR-6/DT-6” is what you’re looking for. This product is a metal-clad and high-quality GIS switchgear solution.

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Compact and extensible

3-position load break switch

Arc-killer option

Over time SGC has developed the “DR-6/DT-6” concept, which combines all medium voltage functions. It allows us to provide custom-built solutions for all your medium voltage needs. 

The DR-6/DT-6 RMU and associated switchgear offer a wide range of applications and can be used worldwide in many industries. It can be used as distribution switchgear with electrical substations, wind generators, cogeneration, and much more. Moreover, the DR-6/DT-6 RMU provides a solution for all your needs and requirements: it can replace obsolete installations and expand existing installations, and it is also perfectly suited for brand-new constructions.

Modular gas insulated switchgear: The DR-6/DT-6 system

  • Gas-insulated switchgear 
  • Safety, reliability, very compact and insensible to the environment in the field of electricity from 6 to 24 kV  
  • Compact and Extensible 
  • Clear synoptic
  • SF6 insulated ring main unit 
  • DR6+: option with built-in ARC-KILLER SV-50
  • Three position load break switch 
  • Combination of load break switch and circuit breaker 
  • Optional: Easy to reach injection points (at the top) 
  • Ur = 12-24 kV; Lr = 630 A
  • LBS-ESW RV50
  • Remote control operation or manual/automatic

Power stations generate electrical power, with voltages up to 380.000 V, which is transported to transformer stations and dispersion stations. These substations distribute medium voltage (+/- 10.000 V to +/- 24.000 V). Here too, a number of SGC’s RMU’s are used. A medium-voltage grid starts from every substation and supplies a large area with medium-voltage.

Wherever medium-voltage enters residential areas, industrial production companies, market gardening, hotels, sport venues, and more, there is a medium-voltage switchgear fulfilling four essential functions: power supply, security, measurement and transformation.

Internal Arc resistance

DR-6 RMU were tested at IPH IAC (AFL) for 20 kA/1s. at a rated voltage of 17.5 kV/24 kV according to IEC 62271-200, appendix A and met the 5 criteria. Consequently, all SGC nv SwitchGear Company RMU’s are internal arc resistant.

DR-6+/DT-6+ option with built-in Arc-killer SV-50

The DR-6+/DT-6+ includes the arc-killer SV-50, a system for detecting and extinguishing an internal arc. The arc-killer extinguishes the arc by directing it to a metal earthed short circuit. The arc is extinguished in less than 50 ms. As a result, the expansion of hot gasses in a room can be reduced to zero. DR-6+ type RMU’s offer protection against an internal arc classification IAC category B, FLR 20 kA 1 s. (F=frontal, L=lateral, R=rear). The patented SV-50 Arc-Killer takes safety to a new level. The operator and the environment are shielded from harm, whether the operator stand in front of the switchboard, next to it or behind it. What’s more, the arc-killer’s improved security features place less strict demands on the installation room. As such, the Arc-Killer couples security and operational safety, with flexible room demands.

Discover Arc-killer

Our DR-6/DT-6 product line

Discover the product that’s right for you. SGC helps you choose the best solution. Our DR-6/DT-6 range is a very in-demand product range, and that has its reason. The DR-6/DT-6 range offers a compact, safe, reliable and economical design, free of any possible environmental aggression.

It’s built to last: all components are resilient and of superior quality. Also, all models can be equipped with a wide range of optional features.

Guaranteed operator safety, co-engineering and long-lasting features and quality are some of the reasons why SGC is a preferred partner. 

Want the first-rate product with built-in ARC-killer? Then go for the DR-6+/DT-6+ with built-in ARC-killer SV-50.

Want more information? Our team is here to help.

Download our complete DR-6/DT-6 catalogue

Different modules

SGC offers a wide range of modules, one for every need. All modules are available in a compact version (DR-6C /DT-6C) or an extensible version (DR-6E /DT-6E) and with the optional arc-killer SV-50 (DR-6C/E+/ DT-6C/E+). 

Each module comes with a pack of options, but also with a standard equipment, namely:

  • Bushing interface type C, according to DIN EN 50181
  • Cable clamps for monopolar cable with section up to 240 mm2
  • Door interlock
  • Integrated voltage indicators of the type Mevoco HR-3
  • LV compartment
  • MV cable access door
  • Floor panels
  • Operating handle

As mentioned earlier, each module can be adapted to our clients’ needs by making use of some options. Those options depend on the type of circuit breaker (fe. vacuum circuit breaker) and the type of function (K function, T function or D function).

Technical specifications

Rated voltagekV1217.524
General specifications
Impulse withstand voltage 1,2 / 50 µsec.
To earth and between phaseskV75
Over the insulation distancekV85
Power frequency voltage test 1min.
To earth and between phaseskV28
Over the insulation distancekV32
Rated frequencyHz50/6050/6050/60
Rated short time current 3 s. kA212121
Rated peak value of the current52.552.552.5
Internal arc 1 s. IEC 62271-200 (5 criteria)kA202020
Degree of protection
HV-compartmentIP6XIP6XIP6X
LV- and cable compartmentIP4XIP4XIP4X
Rated gas pressure at 20°CBar0.5 bar overpressure0.5 bar overpressure0.5 bar overpressure
Line Feeder
Short-circuit making current (Ima)kA202020
Breaking capacity (IEC 62271-103)Class E3Class E3Class E3
Rated current (Iload)A630630630
Closed loop current (Iloop)A630630630
Cable charging current (Icc)A252525
Earth fault current (Ief1)A180180180
Number of makings555
Transformer feeder
Rated current A636363
Fuse switch
Short circuit breaking capacity (limited by the fuse)kA252525
Making capacity636363
Circuit breaker
Short circuit breaking capacity 1s.kA252016
Making capacity635040

(*) According to IEC 62271-103, class E1 / (**) Option Arc-killer

Download our complete DR-6/DT-6 catalogue

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Delivery of DF-2 station for Moundou in Chad.

For a substation of SNE in Chad, contractor Deba opted for SGC’s DF-2 program.

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New exclusive distributor of Switchgear Company in Vietnam

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Other SGC solutions

AIS

Air insulated switchgear

  • Always extendible
  • Minimal amount of SF6 (LBS)
  • Switchgear is compartmentalized
  • Withdrawable circuit breaker
  • 12 kV – 17,5 kV –  24 kV

GIS

Gas insulated switchgear

  • Ring main unit
  • Gas insulated
  • Compact monobloc
  • Lateral extension is optional
  • 12 kV – 17,5 kV – 24 kV – 36 kV 

HYBRID

Hybrid switchgear

  • Always extendible
  • Air insulation + minimal amount of SF6
  • Switchgear is compartmentalized
  • Withdrawable circuit breaker
  • 12 kV – 17,5 kV – 24 kV 

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Innovation and environmental care are the driving forces behind our products and company. A lot of our products are developed from co-engineering with clients, supplying solutions that fit their needs and specifications.

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