Dead Tank Circuit Breakers up to 420 kV
High performance breakers with shortest circuit breaking current up to 80 kA
The 362-420 kV rated Dead Tank Circuit Breakers (DTB) provide robust performance at a low cost of ownership. Tested for high transient recovery voltage (TRV) performance applications, mechanical endurance and switching capabilities and designed for the toughest transmission applications.
For shunt reactor protection, Hitachi Energy now offers Dead Tank Circuit Breakers with applied Metal Oxide Varistors (MOVs). This solution increases the reliability of the breaker by limiting damaging overvoltage’s.
Applications
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 and including 80 kA with no short-line fault capacitors
Slipover current transformers that can be 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 420 kV | 420PM-HB | 362PMR-HB | 362PMI80 | |
|---|---|---|---|---|
| Rated voltage | kV | 362-420 | 362 | |
| Short-circuit breaking current |
kA | 40-63 | 80 | |
| Rated current | A | 5000 | 4000 | |
| Interrupting time | cycles | 2 | 2 | |
| Closing and latching current | kA | 104-164 | 216 | |
| Lightning impulse withstand level - LIWL | kV | 1300, 1425 | 1300 | |
| Operation type* | Single-pole operated | Single-pole operated | ||
| Operating mechanism | HMB-4 | HMB-8 | ||
* Single-pole operation also referred to as independent pole operation.
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