EconiQ® Dead Tank Circuit Breaker 145 kV
Combining low carbon footprint, superior reliability and low life cycle costs
The EconiQ 145PM63-HA is our eco-efficient Dead Tank Circuit Breaker (DTB) for sub-transmission voltage level. The circuit breaker uses a gas mixture of Carbon Dioxide (CO2), Oxygen (O2) and C4-fluoronitrile (C4-FN). The mixture essentially eliminates the CO2 equivalent emissions of the insulating medium.
This product offers easy operation at high-performance ratings by using well-established gas circuit breaker technology, which has been utilized for decades in electricity transmission systems globally. It is also available as hybrid switchgear “EconiQ PASS”, then featuring one or two gas-insulated disconnectors directly connected to the circuit breaker.
EconiQ is Hitachi Energy’s eco-efficient portfolio for sustainability, where products, services and solutions are proven to deliver exceptional environmental performance.
Applications
- Line, transformer, capacitor and reactor switching
- Fit for high seismic activity, high wind speed and high-altitude environments
Why Hitachi Energy?
- Comparable gas handling procedure to SF6 breakers, minimizing training effort and adaptation of service concepts
- Identical gas mixture across the EconiQ metal-enclosed circuit breaker portfolio
- Slipover current transformers that are added or removed without bushing removal, reducing maintenance downtime and eliminating contamination risk
- Tested according to IEEE and IEC standards with mechanical endurance class M2 and capacitive switching class C2
Benefits of the eco-efficient technology
- Reduction of total life cycle emissions
- No risk of accidental leakage of SF6
- Based on Hitachi Energy’s well-proven high-voltage gas-circuit breaker technology
- Soft switching characteristics of gas-circuit breaker with low stress to neighboring equipment
Brief performance data
| EconiQ 145PM63-HA | |
|---|---|
| Rated voltage [kV] | 145 |
| Rated frequency [Hz] | 50/60 |
| Rated short-duration power-frequency withstand voltage (1 min) [kV] | 275 |
| Rated lightning impulse withstand voltage (1.2/50 μs) [kV] | 650 |
| Rated normal current [A] | 3000 |
| Rated short-time withstand current (3 s) [kA] | 63 |
| Rated peak withstand current [kA] | 164 |
| Ambient temperature [°C] | -30*) / +50 |
*) Below -30°C with tank heaters.
The data are not limiting values. Additional data on request.