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Dead Tank Circuit Breaker 72.5 kV

Robust design for all extremes

The 38-72.5 kV Dead Tank Breakers are designed to excel in a broad range of power applications. Utilizing technology pioneered by Hitachi ABB Power Grids and used across the industry today, the dead tank breaker line features slipover current transformers as well as independent pole capability and self-blast interrupters.


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

Why Hitachi ABB Power Grids?

  • Independent pole operation available for synchronous switching and greater system reliability
  • 45 kA Interrupting rating is suitable for application on systems with higher than standard fault duties or current asymmetry (X/R Ratio), eliminating the need for costly system modifications 
  • Slipover current transformers that are added or removed without disassembly, reducing maintenance downtime and eliminating contamination risk
  • Spring-spring operating and spring hydraulic mechanisms available
  • Widely installed base in all environments and applications
  • Global service organization, local everywhere

Brief performance data

DTB up to 72 kV   72PMI
Rated voltage kV 72.5  72.5
Short-circuit breaking current*
kA 31.5, 40 40
Rated current A 3000 3150
Break time cycles 3, 5 3
Closing and latching current  kA 82, 104 104
Lightning impulse withstand level - LIWL   200, 250, 350 350
Operation type   Single- or three-pole operated Three-pole operated
*45 kA on request      
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