17.5 kV Air Insulated Switchgear – MSGair

The MSGair is a factory assembled, single busbar, type tested, medium voltage, metal enclosed, air-insulated switchgear suitable for indoor installations. The switchgear can be provided with vacuum circuit breakers or Sulphur Hexaflouride (SF6) circuit breakers. The switchgear’s has been designed and tested in accordance to IEC 62271-200 and has the following features:

  • Easy installation, function and maintenance. – Operations are within reach of the operator.
  • Manual and/or electrical operated.
  • Personnel Safety – All operations can be done with all doors closed.
  • Modular design.
  • Extensible from both sides.
  • Optimised for industrial and utility applications.
  • Accessibility of compartments
  • Various substation configurations possible


Type test certificate for 17.5kV 25kA

Type test certificate for 17.5kV 31.5kA

Type test certificate for 12kV 25kA

Type test certificate for 12kV 31.5kA

Electrical Characteristics of the switchgear

Rated Voltage17.5 kV
Test Voltage90kV
Rated Frequency50Hz
Rated Short Time31.5kA for 3s
Peak Withstand Current80kA
Rated Current of Main busbarsUp to 2000A
Rated Current of Feeder ConnectionsUp to 2000A
Busbar ConfigurationSingle

Mechanical Characteristics of the switchgear

Partition ClassPM
Degree Of ProtectionIP4X (External), IP 2X between compartments
Service ContinuityLSC2B
Switching MediumVacuum
Construction of Switching MediumWithdrawable
Mechanism of Switching MediumSpring Charged Electrical/Mechanical
Cable AccessFront/Rear
Cable EntryBottom-Rear
Standard Paint FinishRAL 7035

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