Live Tank Circuit Breaker LTB D 72.5 – 170 kV
Protecting more networks than any other high-voltage breaker
The LTB D is suitable for breaking current up to 40 kA, with fast interruption for maximum power system stability. It is configurable for all applications and environments. 
 
The LTB D is designed and type tested in accordance with international standards IEC and IEEE. 
LTB D is also available as a Disconnecting Circuit Breaker where the disconnecting function is integrated in the breaker.
Applications
- Line, transformer, reactor and capacitor switching 
- Switching of harmonic filters 
- Low frequency railway applications 
Why Hitachi Energy?
- Compact design and easy installation 
- High mechanical and electrical endurance 
- Low failure rate 
- High seismic capability 
- Proven performance in both high and low temperatures 
- Low environmental impact 
- Meets a large variety of challenging requirements 
- Available with polymeric insulators for higher reliability and availability 
- Global service organization, local everywhere 
Brief performance data
| LTB Type | LTB D | |
|---|---|---|
| Rated voltage | kV | 72.5 - 170 | 
| Frequency | Hz | 50/60 | 
| Rated continuous current | A | up to 3150* | 
| Rated short circuit breaking current | kA | 40 | 
* Standard values as per IEC. Additional data on request
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