Development and testing of optically-interrogated current sensors

John Nelson, Grzegorz Fusiek, Lloyd Clayburn, Pawel Niewczas, Campbell Booth, Philip Orr, Neil Gordon

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

5 Citations (Scopus)


We report on the design and construction of a low-cost, accurate optically-interrogated low voltage transducer (LVT) which, when combined with a Rogowski coil or conventional current transformer, forms an optically-interrogated current sensor (OCS). The LVT has been designed to be capable of being mass produced. The OCS requires no power supply and is interrogated remotely. Furthermore, it can be multiplexed in series or in parallel, allowing for multiple current measurements at different sites to be made by the same interrogator. The LVT and OCS have been tested against the accuracy requirements of the IEC 60044-8 standards for electronic current transformers (ECTs) both by direct signal injection, and by primary current injection when interfaced with a conventional PX class CT. The LVT and OCS are shown to meet the stringent 5P protection class requirements and also the additional requirements of the Transient Protection Electronic (TPE) class.
Original languageEnglish
Title of host publication2016 IEEE International Workshop on Applied Measurements for Power Systems (AMPS)
Place of PublicationPiscataway
Number of pages5
ISBN (Print)9781509023738
Publication statusPublished - 24 Oct 2016


  • optical fiber sensors
  • optical fibres
  • adaptive optics
  • current transformers
  • Fiber Bragg grating
  • optical current sensor
  • power system instrument

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