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Blue Instrument Transformers-Air Insulated Switchgears

Blue Instrument Transformers-Air Insulated Switchgears
Blue Instrument Transformers-Air Insulated Switchgears
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Product Code : Blue_instrument
Product Description


Trench is one step ahead to reduce the presence of SF6 ininstrument transformers by introducing a completely SF6 freesolution up to 420 kV. Long term sustainability and no environmental compromiseare now available with this innovative clean air insulated portfolio.

The unique portfolio of Clean Air instrument transformers istested and available for worldwide applications.

Clean Air instrument transformer are installed and inservice with outstanding results, proving this innovative and eco-friendlyproduct is highly reliable for the use in AIS and GIS switchgear applications.

Learn what our customers think about the Clean Airtechnology: link to Siemens flash news pilot projects Netze BW, E.ON, Tennet.

The Clean Air portfolio is fully compliant and tested tointernational standards. It provides the same electrical and insulationfeatures as traditional insulation technologies while at the same time givingall the benefits of a SF6 free solution.

General Features:

  • Complete portfolio available up to 245 kV (current and combined transformers), 420 kV (inductive voltage transfomers)
  • Meet all lEC and ANSI metering and protection classes, including
  • special core classes TPS, TPX, TPY and TPZ ones
  • CT ratings:
  • Rated primary current up to 6000A
  • Rated secondary current of 1A. 2A or 5A
  • Rated short tinme thermal current up to 80 Ka
  • Rated dynamic current up to 200 kAp

Primary and/or secondary reconnection available
Fully type tested according to international standards
Special tests are also available to meet specific customer requirements.

Product Design:

  • Complete portfolio available from 72 to 245 kV: current transformers, voltage transformers and combined current-voltage transformers
  • No environmental compromises and never subjected to gas taxation.
  • Interna! insulation is made by clean air, thus:
  • F-gas free insulation with lowest requirements on training, transport, installation, operation, reporting and recycling
  • C-gas free with no risk of C-decomposition
  • No gas recycling required
  • Clean air is the main insulation medium
  • Explosion-proof design
  • External insulation with composite insulator; porcelain insulator available on request
  • Bar-type primary conductor allows higher short circuit current and avoids large voltage drop across the primary winding
  • Available to withstand:
  • Interna arc effects [according to IEC 61869 protection stage 1)
  • Heavy seismic solicitations, according to IEC 62271, IEEE 693 and specific customers requests


Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Mr Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249