220 kV ZR series earthing clamps

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:
- rated voltage - 220 kV;
- rated current - 315 A;
- nominal frequency - 50 Hz;
- rated short-term withstand current (thermal resistance current) - 31,5(40) kA;
- the highest peak of rated short-term withstand current (electrodynamic resistance current) - 80(100) kA;
- time of flow of nominal short-term withstand current (short circuit time) - 1s;
- permissible mechanical load on the terminals taking into account the wind influence - 800(1200) N;
- installation altitude above sea level - not more than 1000 m;
- upper value of ambient air temperature - plus 40 ° C;
- lower...