EconiQ® Dead Tank Circuit Breaker 550 kV
World’s first SF₆-free 550 kV dead tank breaker available with pre-insertion resistor
The EconiQ 550PM63-HA is the first eco-efficient Dead Tank Circuit Breakers (DTB) for 550 kV which operates without SF6. It combines a low carbon footprint, superior reliability and low life cycle costs.
The eco-efficient 550 kV DTB uses a gas mixture of carbon dioxide (CO2), oxygen (O2) and a specific fluoronitrile (C4-FN) to essentially eliminate the carbon equivalent (CO2eq) emissions of the insulating medium. The DTB is based on well-established and reliable gas-circuit breaker technology that has been utilized for decades in transmission systems globally. It is designed to meet the rigorous demands of modern power grids while ensuring that it retains the same footprint, dimensions, reliability, and efficiency as conventional SF6 equipment. As an option, it is available with pre-insertion resistor or point-on-wave controller.
EconiQ is Hitachi Energy’s eco-efficient portfolio with products, services, and solutions proven to deliver exceptional environmental performance.
Applications
- Line, transformer, reactor and capacitor switching
- Fit for high seismic, high wind speed and high-altitude environments
Why Hitachi Energy?
- It is the world’s first SF6-free 550 kV Dead Tank Circuit Breaker
- Tested according to IEEE and IEC standards with mechanical endurance class M2 and capacitive switching class C2
- Comparable gas handling procedure to SF6 breakers, minimizing training effort and adaptation of service concepts
- Identical gas mixture across EconiQ metal-enclosed circuit breaker portfolio
Benefits of the eco-efficient technology
- Reduction of total life cycle emissions
- No risk of accidental leakage of SF6
- Transparent environmental performance thanks to a detailed product life cycle assessment
Brief performance data
| EconiQ 550PM63-HA and EconiQ 550PMR63-HA*) | |
|---|---|
| Rated voltage [kV] | 550 |
| Rated frequency [Hz] | 50/60 |
| Rated short-duration power-frequency withstand voltage (1 min) [kV] | 860 |
| Rated lightning impulse withstand voltage (1.2/50 μs) [kV] | 1800 |
| Rated switching impulse withstand voltage (250/2500 μs) [kV] | 1300 |
| Rated normal current [A] | 5000 |
| Rated short-time withstand current [kA] | 63 |
| Rated peak withstand current [kA] | 171 |
| Ambient temperature [°C] | -30*) / +50 |
*) PMR (with a pre-insertion resistor) are identical to PM values.
**) Below -30°C with tank heaters.The data are not limiting values.
Additional data on request.