General 1. It is applicable to three-phase AC, 50(60) Hz electric power system with rated voltage of 3.6-12kv. 2. It is capable of short-circuit making to protect other electrical equipments inside the switchgear being damaged. 3.It is applicable to switchgear as KYN28-12 and various ring main units. 4. It aims to provide earthing protection during repair and maintenance of high-voltage electrical equipments.
5. Applicable Standards: IEC 62271-103 High voltage switchgear and controlgear-Part 103: Switches for rated voltages above 1 kV and up to and including 52 kV.
Nomal service condition • Ambient temperature: -25°C'40°C. • Altitude≤1,000m. • Humidity: Daily mean relative humidity is no more than 95%; monthly mean humidity is no more than 90%. • Seismic Fortification Intensity: No more than 8 degree. • Pollution level: Class II.