LV & MV Switchgear Manufacturer

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Medium Voltage Air-Insulated

Metal-Enclosed Switchgear Internal Arc-Proof


  • Characteristics

HMS series, HYUNDAI Medium Voltage Air-Insulated Metal-Enclosed Switchgear, provides the highest level of performance and various advantages with their reliable features and compact design to meet all electrical requirements of  the medium voltage distribution system up to 36 kV.

  • Loss of Service Continuity

Complying with new definition of service continuity, partition class, maintainability and internal arc classification of IEC 62271-200.

  • Arc Classification

HMS Switchgear is designed to withstand and protect personnel in the case of failure due to internal arcing, and classified as IAC AFLR, up to 50 kA.

  • Test & Standard

Designed, type tested, and manufactured according to the certified assurance program, IEC 62271-200 and the related standards.


  • Up to 36 kV, Medium Voltage Air-Insulated Metal-Enclosed Switchgear LSC 2B, Internal Arc-Proof.
  • Air - Insulated Metal - Enclosed Switchgear, provides various benefits with its safe, reliable features, and compact design.
  • Air - Insulated Metal - Enclosed Switchgear, manufactured and tested based on experience acquired throughout the world since 1979.


  • Safe and Reliable
  • Loss of service continuity category LSC 2B
  • Partition class PM
  • Internal arc classification IAC A FLR
  • All operations with the front door closed
  • Metallic enclosure, earthed metal shutter and partitions
  • The power-on indicator situated on the front of the switchgear
  • Interlock and padlocks prevent operator errors
  • Type-tested for each switchgear type
  • The design, manufacturing and testing according to ISO9001 quality standard.
  • Flexible Compact Design
  • Modular structure, easily built
  • Wide range of functional units available for all installation solutions
  • Minimum space requirements thanks to compact design and flexible connection options
  • Easy Installation and Maintenance
  • Maintenance free vacuum circuit-breakers and vacuum contactors
  • Minimum interruption under operation by logical interlocking system
  • Simple maintenance activities
  • Easy and fast installation

Typical Application



Normal current


Short-circuit withstand current


Loss of service continuity category and partition class

Loss of service continuity category

Partition class

Accessibility to compartments

Busbar compartment

Switching device compartment

Connection compartment

Internal arc classifications

Internal arc classifications





Protection degree

For internal partition


For standard enclosure


For optional enclosure








≤ 36 kV

≤ 17.5 kV: Up to 4,000 A

>  24 kV: Up to 3,150 A

≤ 12 kV: Up to 50 kA (3 sec)

>  24 kV: Up to 25 kA (3 sec)


LSC2B (metal-clad)

PM (metallic partition)




Interlock-controlled, procedure and/or tool-based



Isc ≤ 50 kA, t ≤ 1 s

Internal arc classification

Accessible to authorized personnel for front, lateral and rear side


Protection for fingers or objects with a diameter greater than 12 mm.

Protection for a diameter or strips of a thickness greater than 1.0 mm.

Available on request

Utility and Power Plants

  • Transforming stations
  • Switching stations
  • Power generation stations
  • Main and auxiliary switchgear


  • Chemical industry
  • Petroleum industry
  • Iron and steel works
  • Automobile industry
  • Oil and gas pipelines
  • Textile, paper and food industries
  • Rolling mills


  • Drilling rigs
  • Offshore flatforms and FPSO
  • Container ships
  • Passenger ships
  • Tanker ships
  • Bulk ships

Services and Transport

  • Shopping malls
  • Hospitals
  • Large infrastructure and civil works
  • Airports, ports

Medium Voltage Air-Insulated

Metal-Enclosed Switchgear Internal Arc-Proof

A member of  Golden Light Group

© 2017. SEMACOM Integrated, PT.  All right reserved.