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Substation and system intertie transformers

Substation transformers transfer the incoming high-voltage to the next lower voltage level. As an example, an incoming high-voltage of 400 kV would be transferred down to 220 kV.

In general, substation transformers are equipped with on-load-tap-changers (OLTC). Incoming transmission lines are connected to the transformers through bushings and cables through cable boxes and cable sealing ends. These transformers are built in core form with auto-connected windings, ie common main winding and a separate low voltage winding.

Product scope

  • Ratings up to 1,300 MVA (sometimes higher ratings are required)
  • Primary voltage up to 765 kV and higher
  • Secondary voltage generally <= 230kV or higher depending on the grid configuration
  • Load tap changers generally required
  • Single- or three-phase

Why our core intertie transformers?

  • Our track record of 1,400+ units delivered since 1995
  • Short circuit performance at twice the industry standard
  • Proven track record in meeting customer performance requirements. Ask for our test floor failure statistics
  • 12 factories - one global approach - bringing consistency, delivery performance and technology

Why our shell intertie transformers?

  • Design technology eliminates the risk of a hot spot
  • Outstanding thermal performance resulting from directed oil flow, minimization of losses and control of the hot spot

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