Choose your region and language



Live Tank Circuit Breaker EDF SK 1-1 up to 72.5 kV

Well proven circuit breaker based on established design, assembled and tested for rapid installation

The EDF SK is a live tank SF6 Auto-Puffer™ circuit breaker. It has a proven design and long performance in a vast range of environments and ambient conditions with an installed base in over 80 countries. The EDF breaker is type-tested to stringent conditions as per the IEC standard for high voltage circuit breakers, IEC 62271-100.


  • Switching of Transmission Lines

  • Switching of Transformers 

  • Switching of Capacitor banks

  • Switching of Reactors 

Why Hitachi Energy?

  • Proven self-blast technology with low energy requirement

  • Superior switching capability – Class C2 & S2 as per IEC 

  • Proven performance in extreme temperatures, from -30 °C to +50 °C

  • Compact design and easy installation 

  • High seismic capability due to optimized pole and structure design

  • Global service organization, local everywhere 

Brief performance data

LTB Type      EDF SK 1-1 
Rated voltage kV 72.5
Frequency Hz 50-60
Rated continuous current A 2500*
Rated short circuit breaking current kA 31.5

* Standard values as per IEC. Additional data on request.

Something caught your eye?

Our sales team will get in touch with you