November 24, 2017

ACTOM MV Switchgear introduces compact version of new generation AMV12 switchgear range

ACTOM MV Switchgear recently developed and introduced a compact version of its new generation AMV12 air-insulated indoor switchgear.

The AMV12 range, rated for 12 kV with current ratings of 1250 A and 2500 A at 31,5 kA in accordance with IEC 62271-200, has proven to be highly successful since its launch into the market in January 2015. Over 300 panels have already been sold and supplied to numerous customers, which include Johannesburg’s City Power, the City of Windhoek, Hessequa Municipality (Stilbaai), CONCO and DRA.

The supplementary compact version now on offer has been developed specifically for use in instances where space constraints apply. The width of a compact panel, which has a current rating of 800 A, is 650 mm, while individual standard AMV12 panels are available in widths of 800 mm and 1000 mm.

“A single compact unit is 18% smaller in width than one of our standard 1250 A rated AMV12 units. This translates into a space saving of between 14 and 18% for a typical switchboard, depending on the busbar rating and mix of compact versus standard units making up the complete switchboard,” commented Greg Whyte, ACTOM MV Switchgear’s Design & Development Manager.

The new compact unit has been type-tested and certified in accordance with the IEC System for Conformity Testing and Certification of Electrical and Electronic Components, Equipment and Products Certification Bodies Scheme (The IECEE CB Scheme), the world’s first truly international system for the mutual acceptance of test reports and certificates dealing with the safety of electrical equipment and products.

The type-tests on the compact AMV12 panel assembly, complete with circuit-breaker, earthing switch and cable-side voltage transformer, were carried out overseas through the well-known international certification body TUV Rheinland in January this year.

The type-tests that were performed on the unit comprised full testing for short-circuit performance, dielectric performance, temperature rise performance and internal arc classification. Highlights of the tests are:


  • Circuit-breaker with extended electrical endurance ‘class E2’ (with auto-reclosing duty)
  • Earthing switch with short-circuit performance ‘class E2’
  • 95 kV lightning impulse withstand level (BIL)
  • Internal arc classification IAC AFLR 31,5 kA 1 sec and IAC AFLR 25 kA 1 sec (without deflectors)

“With its extended mechanical endurance ‘class M2’ and capacitive switching performance ‘class C2’, the AMV12 circuit-breaker is also fully capable of switching power factor correction (PFC) loads,” said Rhett Kelly, ACTOM MV Switchgear’s Technology Development Specialist.

“In addition to new installations where space constraints may necessitate the use of the compact units, the new product is ideally suited for the upgrading and replacement of existing older generation compact metal-enclosed switchgear,” he concluded.

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