Choisissez votre région et votre langue


Dead Tank Circuit Breaker 800 kV

Pioneering high performance breaker technology

Hitachi Energy pioneered the 800 kV dead tank breaker in the year 2000.  Now a mature offering, the breaker line features one mechanism per phase, high TRV and current potential for longer transmission lines and larger loads.

For shunt reactor protection, Hitachi Energy now offers Dead Tank Breakers with applied Metal Oxide Varistors (MOVs).  This solution increases the reliability of the breaker by limiting damaging overvoltages.  Read more about it here or watch the video here.


  • Line, transformer, reactor and capacitor switching
  • Point-on-wave switching
  • High seismic applications
  • High altitude applications

Why Hitachi Energy?

  • High TRV withstand for long transmission lines
  • High current potential facilitates high load transmission 
  • Flexible design platform provides options for pre-insertion resistors, and various height-to-live part configurations
  • Short installation time due to factory pre-assembly
  • 10 year warranty on the HMB operating mechanism
  • Widely installed base in all environments and applications
  • Global service organization, local everywhere

Brief performance data

DTB 800 kV   800PM 800PMov 
Rated voltage kV 800 800
Short-circuit breaking current
kA 40-63 63 
Rated current A 5000 3000, 4000, 5000 
Break time cycles 2
Operation type   Single-pole operated  
Reactor protection   No MOV  MOV

Contact us

Submit your enquiry and we will contact you