Current Transformer ALG

High current transformers type ALG are mounted on insulated generator bushings. They transform high currents up to 50000 A into standardised values for meters, measuring and protection devices. Type ALG current transformers are used for installation on high-current ducts for generators. They transform high currents up to 50,000 A into stand-ardised, equivalent values for counters, measuring equipment and protection devices. The high currents and short phase distances that generators experience place extreme demands on transformers in terms of temperature and interfering fields. Compensating windings are fitted to achieve the necessary accuracy, with the transformers also being designed to withstand very high temperatures. The ALG transformer can be equipped with up to four secondary windings. Insulation is fitted inside the duct itself. This type can be manufactured and tested in accordance with specific standards. Protection classes for transient transmission behaviour (TPY, TPZ) are also possible. The secondary connections are located in separate terminal boxes. The ALG transformer can be manufactured so as to permit installation in Zone 2 areas at risk of explosion in accordance with its official type test certificate.


  • Equipped with compensating windings to block interfering fields
  • Designed as a multi-core current transformer
  • ATEX-certified to explosion category Ex II 3G