Air insulated switchgear

High-quality AIS – air insulated switchgear: DW-2

We engineer reliable switchgear built on safety and durability

With the “DW-2”, we created another concept around safety. Our product is a metal-clad and high-quality AIS switchgear solution. It is also armored between the compartments as an extra safety measure. Our DW-2 is a modular concept combining all medium voltage functions. Therefore, we provide made-to-measure solutions for all your medium voltage needs.

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Modular design

Metal Clad

Higher Circuit

The DW-2 system is a modular concept based on the “building blocks” principle, which means that cubicles are produced in series. As a result, the modular DW-2 concept meets the highest technical standards in a rational, economically sound way. The combination of cubicles is unlimited. 

Our DW-2 system is intended for higher currents (>1250A), which makes it ideal for heavy industries. It also peaks in safety levels by being armored between the compartments, having withdrawable circuit breakers and you have an indication through the window of our cubicles. Manual operation of the cubicles requires minimal switch force. The clean and neat synoptic diagram provides a clear and safe overview of the different positions of the various parts of the cubicle.

SGC offers a wide range of applications with the DW-2 cubicles and associated air insulated switchgear solutions. Every cubicle contains all functional interlocks which allows for effortless application. That’s  according to all current standards. Therefore, DW-2 allows installation in consumer work spaces. That results in minimal capacity loss.

For all your needs and demands, the DW-2 cubicles and associated air insulated switchgear provide a solution: it can replace obsolete installations and extend existing installations, and it is also perfectly suitable for entirely new constructions.

Modular air insulated switchgear: The DW-2 system

  • Air Insulated Switchgear: metal clad AIS cubicles with galvanized steel sheets 2mm and armored between the compartments
  • Modular system - combination is unlimited
  • Higher circuit – heavy industries
  • Remote control operation or manual/automatic
  • Can be equipped with a wide range of optional features

Equipped with a robust two-position load break switch RV-44 (open or closed), that is sealed for life. Can withstand a pressure of 800 A and optional 1250 A (double busbar system). DF-2 ’s modular design allows you to create rational, economical & custom-made combinations of medium voltage cubicles (with a rated voltage 12,17 or 24 kV).  The position of the load break switch is clearly indicated in the single line diagram. The position can be controlled at all times, not only by the synoptic but also through the two inspection windows integrated in the front door of the cubicles. This kind of load break switch has large contacts and can withstand the voltage with pressure.

Tested to the limit

The DW-2 is designed to resist internal arcs, protecting both the operator and the installation. The cubicles have been fitted with a system for pressure release which shields the user from the consequences of an internal arc. An internal arc is created by a short-circuit or another malfunction.

Cubicles consist of 2 mm galvanized steel plates. By opting for this particular plate size, the cubicles are able to withstand internal arcs effortlessly, both in the cable compartment as well as in the busbar compartment.

A lot of detail went into the functional design to ensure that, in the event of an internal malfunction, no bursts of flames can move between plating surfaces, the door or between cubicles. Possible internal arcs are also guaranteed to be restricted to the compartment where they originated. The roof of the cubicle can be easily dismantled to provide smooth access to the busbar during installation and/or maintenance activities.

DW-2 switchgear solutions are all fully type tested according to IEC 62271-200:

  • Short time and peak withstand current
  • Dielectric test on main and auxiliary circuits 
  • Making and breaking capacity of the circuit
  • Mechanical operations breaker within the panel
  • Temperature rise and main circuit impedance
  • Internal arc fault (IAC classified: AFLR, 31.5A/1s)
  • Earthing switch making capacity

Consequently, all SGC – SwitchGear Company cubicles are internal arc resistant.

Our DW-2 AIS product line

Discover the product that’s right for you. We, at SGC, are here to help you choose the best solution. Besides the popular DF-2 and compact DF-3 range, you have the DW-2. This is our strongest product. With it’s intention for higher current, it’s ideal for heavy industries. 

Hugely tested, the DW-2 showcases another concept around safety. Between the 2mm compartments it’s armored in case there’s an internal arc.

Besides that you have withdrawable circuit breakers as an extra safety mechanism. Guaranteed operator safety, co-engineering and long-lasting quality are some of the reasons why SGC is a preferred partner.

Want more information? Our team is here to help.

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Technical specifications

Rated voltage12 kV
Rated power frequency withstand voltage (Ud)28 kV
Rated lightning impulse withstand voltage (peak)75 kV
Rated short-circuit breaking current (lsc)to 31.5 kA
Rated peak withstand current (lp)to 82 kA
Rated short-time withstand current (lk)to 31.5 kA
Rated duration of short circuit current (tk)4s
Internal arc withstand current, 1s31.5 kA
Rated frequency50/60 Hz
Rated busbar current2500 A
Rated feeder current630 A, 1250 A, 1600 A, 2000 A
StandardsIEC 62271-200
Degree of protection (RC 630 A, 1250 A)IP4X
Degree of protection (RC 1600 A, 2000 A)IP3X
Temperature range- 25 ... + 40°C
Maximum relative humidity95%
Maximum altitude1000m a.s.l.*

* For installations at altitudes higher than 1000m, the insulation withstand level of external insulation at the service location has to be determined by multiplying the rated insulation levels by a factor Ka in accordance to IEC 62271-1.

Download our complete DW-2 catalogue

Our DW-2 cubicles can be used in a wide range of configurations

DW-2-IF

Incoming/outgoing feeder


DW-2-BR

Bus riser


DW-2-BT

Bus tie


DW-2-M

Direct incoming feeder

Discover more and other configurations

DF-2 projects

Cabling via 3D engineering

Turnkey cabling with 3D design software

Optimizing production processes with our cable machine, an automation solution for wire assembly.

Read More

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.

Read More

New exclusive distributor of Switchgear Company in Vietnam

We are proud to confirm that Asia Technology and Energy System Co. Ltd is the official dealer of…

Read More

Cabling via 3D engineering

Turnkey cabling with 3D design software

Optimizing production processes with our cable machine, an automation solution for wire assembly.

Read More

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.

Read More

New exclusive distributor of Switchgear Company in Vietnam

We are proud to confirm that Asia Technology and Energy System Co. Ltd is the official dealer of…

Read More

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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 

We excell in co-engineering 
made to measure solutions

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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Our SwitchGear projects worldwide...