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Live Tank Circuit Breaker LTB E up to 800 kV

World’s most versatile transmission breaker

LTB E is suitable for breaking currents up to 63 kA for maximum power system stability at rated voltage up to 800 kV. It is configurable for all applications and environments.

The installation and commissioning are fast and simple. It is proven in extreme locations, including deserts, the tropics and cold climates, withstanding natural disasters from hurricanes to major earthquakes. 

LTB E is designed and type-tested in accordance with international standards (IEC, ANSI and others). Also tested to national standards (GOST, DL and DIN).


  • High altitude applications

  • High seismic requirement applications

  • Line, transformer, reactor and capacitor switching

  • Switching of harmonic filters 

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 high reliability and availability   

  • Global service organization, local everywhere 

Brief performance data

LTB Type   LTB 170-300E1 LTB 420E2 LTB 800E4
Rated voltage kV 170-300 420 800
Frequency Hz 50/60
Rated continuous current A 4000*
Rated short-circuit breaking current kA 50 63 50

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

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