The simplified GIS, ELK for hybrid applications on 550 kV combines the advantages of encapsulated technology with the simplicity of air-insulated switchgear (AIS). Our hybrid technology delivers the essential switching and measuring components utilizing the well-proven ELK technology of Hitachi Energy that has been in service for close to five decades. It is the most reliable and economical solution for new installations or extensions, and retrofit of existing substations.
ELK Hybrid Switchgear 550 kV
Space and cost optimization with proven technology
Applications
- Optimal for new substation installations with constrained space requirements
- Substation extensions
- Replacement of aged conventional equipment to extend lifetime of substation
- Areas of high seismic activity benefit from low gravity point of equipment
Why Hitachi Energy?
- Proven GIS technology for close to five decades
- Worldwide footprint and experience
- Up to 70 percent space reduction compared to conventional AIS
- Reduced investment costs including transportation and civil works
- Delivery and installation time of 5-6 months
- Full substation design flexibility
- High level of safety due to earthed GIS enclosures and access from ground level to the drives and viewports
Brief performance data
Hybrid Switchgear ELK | |
---|---|
Rated voltage [kV] | 550 |
Rated frequency [Hz] | 50/60 |
Rated short-duration power-freq. withstand voltage (1 min) [kV] | 740 |
Rated lightning impulse withstand voltage (1.2/50 µs) [kV] | 1675 |
Rated switching impulse withstand voltage (250 / 2,500 µs) [kV] | 1300 |
Rated normal current – busbar / feeder [A] | 5,000/6300 |
Rated short circuit-breaking current [kA] | 63/80 |
Rated short-time withstand current (up to 3 s) [kA] | 63/80 |
Rated peak withstand current [kA] | 172/216 |
Ambient temperature range [°C] | -30 … +40 |
Installation | outdoor |
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