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Dead Tank Circuit Breaker 123-170 kV

Compact and preset from factory for rapid installation

The 123-170 kV Dead Tank Breaker (DTB) features a small footprint and a single piece interrupter with factory-aligned contacts that reduce installation and maintenance costs.

 

Applications of Dead Tank Circuit Breakers

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

 

Why Hitachi Energy?
 

  • Enhanced safety and simplified maintenance
  • Rated up to 63 kA with no external line-to-ground capacitors
  • Spring-spring operating mechanism available up to 40 kA 
  • Slipover current transformers that are added or removed without disassembly, reducing maintenance downtime and eliminating contamination risk
  • Widely installed base in all environments and applications
  • Global service organization, local everywhere

Brief performance data

DTB up to 170 kV   145PM40-SD 145PMI40-SD HSR 145 145PMI* 170PM63-HC
Rated voltage kV 123-145 145 123-145, 170 123-170
Short-circuit breaking current kA 40 40 50-63, 40-50 63
Rated current A 3150 2000, 3000 4000 3150, 4000
Interrupting time cycles 3 3 3 3
Closing and latching current kA 104 104, 120 104 130-164, 104-130 164
Lightning impulse withstand level - LIWL kV 550, 650 650 550, 650, 750 550, 650, 750
Operation type**   Three-pole operated Single-pole operated Three-pole operated Single-pole operated Three-pole operated
Operating mechanism   FSA1 HVB S1C HMB-1 HMB-2

  * Line-to-ground capacitors are needed for short-line fault.
** Single-pole operation also referred to as independent pole operation; Three-pole operation also referred to as gang operation.

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