Siemens Blue Instrument transformers Air-insulated switchgear

Blue Instrument transformers : we are one step ahead to reduce the presence of SF₆ in instrument transformers by introducing a completely SF₆ free solution up to 420 kV. Long term sustainability and no environmental compromise are now available with this innovative clean air insulated portfolio.

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

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

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

The Clean Air portfolio is fully compliant and tested to international standards. It provides the same electrical and insulation features as traditional insulation technologies while at the same time giving all the benefits of a SF₆ free solution.

Blue Instrument transformers 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

Siemens Transmission Products – Leader in innovations with comprehensive, connective and sustainable portfolio

Transmission products play a vital role in the energy value chain. Siemens Transmission Products provides all key elements including power transformers and distribution transformers as well as gas-insulated and air-insulated switchgear and components. Products are offered individually, bundled or with related engineering upgrade to systems. Our products offer low life cycle costs with maximum availability, highest efficiency and short commissioning times.

We are driving technology innovations not only regarding the performance of transmission products but also in the area of sustainability and eco efficiency. By merging physics and data we enable new products and applications: Sensformer® and Sensgear®. With our global factory network and leading innovations we provide the highest level of quality and reliability to our customers: TSOs, DSOs, power producers, EPCs and industrial companies.