Dead Tank Circuit Breakers up to 170 kV
Compact and preset from factory for rapid installation
The 123-170 kV Dead Tank Circuit Breakers (DTB) features a small footprint and a single piece interrupter with factory-aligned contacts that reduce installation and maintenance costs.
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 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.