Dead Tank Circuit Breaker 245 kV
High performance breaker with highest short circuit breaking current
A complete range of dead tank breakers at 245 kV provide options for applications with higher than standard asymmetry requirements (X/R ratio) and offers the highest short circuit capacity in the industry at 90 kA. Utilizing technology pioneered by Hitachi Energy and used across the industry today, the robust dead tank breaker line features slipover current transformers, a dual motion interrupter and requires no capacitors up to 63 kA.
For shunt reactor protection, Hitachi Energy now offers Dead Tank Breakers with applied Metal Oxide Varistors (MOVs). This solution increases the reliability of the breaker by limiting damaging overvoltages.
Applications
- Line, transformer, reactor and capacitor switching
- Point-on-wave switching
- High seismic applications
- High altitude applications
Why Hitachi Energy?
- Extreme 90 kA short circuit interrupting ratings and high asymmetrical fault capabilities
- 10 year warranty on the HMB operating mechanism
- Enhanced safety and simplified maintenance
- Rated up to and including 63 kA with no external line to ground capacitors
- 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 245 kV | 245PMR | 245PMRI | 245PMG-B | 245PMI-B | 245PMG80 | 245PMI90 | |
|---|---|---|---|---|---|---|---|
| Rated voltage | kV | 245 | 245 | 245 | 245 | 245 | 245 |
| Short-circuit breaking current* |
kA | 40 | 40 | 50-63 | 50-63 | 80 | 80-90 |
| Rated current | A | 4000 | 4000 | 5000 | 5000 | 5000 | 5000 |
| Break time | cycles | 3 | 3 | 2 | 2 | 2 | 2 |
| Closing and latching current | kA | 104 | 104 | 130-164 | 130-164 | 208 | 208-234 |
| Lightning impulse withstand level-LIWL | kV | 900, 1050 | 900, 1050 | 900, 1050 | 900, 1050 | 900, 1050 | 900, 1050 |
| Operation type | Three-pole operated | Single-pole operated | Three-pole operated | Single-pole operated | Single-pole operated | Single-pole operated | |
| Operating mechanism | HMB-1 (3) | HMB-1 (3) | HMB-8 | HMB-4 | HMB-8 | HMB-4 | |
| MOV | No standard MOV** | No standard MOV** | External MOV | External MOV | External MOV | External MOV | |
| Service conditions | |||||||
| - Ambient temperature* | °C | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 |
| - Design altitude* | m | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
* Other options available, contact factory for additional information.
** Available by request.
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