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Live Tank Circuit Breaker LTB D 72.5 – 170 kV

Protecting more networks than any other high-voltage breaker

The LTB D is suitable for breaking current up to 40 kA, with fast interruption for maximum power system stability. It is configurable for all applications and environments. 
The LTB D is designed and type tested in accordance with international standards IEC and IEEE. 

LTB D is also available as a Disconnecting Circuit Breaker where the disconnecting function is integrated in the breaker.


  • Line, transformer, reactor and capacitor switching

  • Switching of harmonic filters

  • Low frequency railway applications 

Why Hitachi Energy?

  • Compact design and easy installation 

  • High mechanical and electrical endurance 

  • Low failure rate 

  • High seismic capability  

  • Proven performance in both high and low temperatures 

  • Low environmental impact 

  • Meets a large variety of challenging requirements 

  • Available with polymeric insulators for higher reliability and availability  

  • Global service organization, local everywhere 

Brief performance data

LTB Type   LTB D
Rated voltage kV 72.5 - 170
Frequency Hz 50/60
Rated continuous current A up to 3150*
Rated short circuit breaking current kA 40

* Standard values as per IEC. Additional data on request

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