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The MSGair is a factory assembled, single busbar, type tested, medium voltage, metal enclosed, air-insulated switchgear suitable for indoor installations.

The switchgear is provided with vacuum circuit breaker and has been designed in accordance to IEC 62271-200.  It has also been type tested at CESI laboratories in Milan.


  • Easy to install function and maintain, with all operations within easy reach for the operator.
  • Can be operated manually and/or electrically.
  • 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 circuit configurations are possible

Electrical Characteristics of the switchgear

Rated Voltage 17.5 kV

Rated Impulse withstand voltage 90kV

Rated frequency 50Hz

Rated short time-withstand current 31.5kA for 3s

Peak Withstand Current 80kA

Rated Current of Main busbars Up to 2000A

Rated Current of Feeder Connections Up to 2000A

Busbar Configuration Single

Mechanical Characteristics of the switchgear

Internal Arc Classification (IAC) AFLR 31.5kA, 1s

Loss of Service Continuity LSC2B

Degree of Protection IP4X

CSwitching Medium Vacuum

Type of Switching Medium Withdrawable

Mechanism of Switching Medium Spring Charged

Cable Access Front/Rear

Cable Entry Bottom/Rear

Standard Paint Finish RAL 7035


MSGair Medium Voltage,
Air Insulated, Switchgear Substations