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 Energy 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.

Applications

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

Why Hitachi Energy?

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	72PM40-SD
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	kV	350	350
Operation type		Single-pole operated	Three-pole operated
Operating mechanism		HMB-1 (3)	FSA1
MOV		No standard MOV**	No standard MOV**
Service conditions
- Ambient temperature*	°C	-40 to +40	-40 to +40
- Design altitude*	m	1000	1000