Grounding Devices Series ZR for 220 kV Voltage - Essential for Power Lines

Earthing plates ZR-220 kV are designed for earthing of power lines at rated voltage 220 kV. Earthing switches are produced in single-pole and three-pole version, the earthing switch is operated by motor drive PD-14. Earthing switches can be supplied with supporting metal structures. ZR is a chopping type earthing switch. Main technical characteristics: <ul> <li>- rated voltage - 220 kV;</li> <li>rated current - 315 A;</li> <li>nominal frequency - 50 Hz;</li> <li>rated short-term withstand current (thermal resistance current) - 31,5(40) kA;</li> <li>the highest peak of rated short-term withstand current (electrodynamic resistance current) - 80(100) kA;</li> <li>time of flow of nominal short-term withstand current (short circuit time) - 1s;</li> <li>permissible mechanical load on the terminals taking into account the wind influence - 800(1200) N;</li> <li>installation altitude above sea level - not more than 1000 m;</li> <li>upper value of ambient air temperature - plus 40 ° C;</li> <li>lower...</li> </ul>