High Voltage Shunt Capacitor are suitable for AC electric system with power frequency 50 or 60Hz and comply with IEC 60871

4. Capacitor should bear transition over-voltage with first peak not exceed 2.2Un and duration 1/2 period 2.6 For voltage up and higher harmonic, capacitor permit operate on stability over-current with effective value of 1.3In, but for capacitor with max positive deviation, over- current permit up to 1.43In..