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Part of DEIF’s current transformer range, the protection transformers are used for over-current and earth fault protection in balanced protection systems.

DEIF offers 14 different physical sizes of the protection transformers.

The housing of the transformers is made of impact resistant thermoplastic to ensure a highly reliable quality. The terminals of the transformers are protected by a cover.

In order to ensure short delivery time, we keep an extensive program of transformers in stock.



  • Designed for round cables 
  • Primary current: 100 to 300 A Class: 5P5, 5P10 


  • Designed for round cables and busbar.
  • Primary current: 50 to 1,600 A. Class: 5P4, 5P5, 5P10, 10P5, 10P10.
  • Designed for cables and busbar
  • Secondary current: 5 or 1 A
  • Accuracy class/protection class up to 10P10

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