Automatic capacitor bank

medium-voltagefloor-mountedfor power factor correction

In relation to the former generation of "mixed" type (paper + film) dielectric capacitors, synthetic "All-film" type dielectric capacitors have a much longer service life, due to their very high thermal stability related to very low power losses due to the removal of the paper and the remarkable chemical stability of the liquid dielectric enabling: - A high partial discharge absorption capacity - A high dielectric resistance to transient excess currents and excess voltages - A very low variation of capacitance as a function of temperature Average loss factor: - 0.15 W/kvar at power-up - 0.1 W/kvar after 500 hours of operation Variation of capacitance as a function of temperature: - Mean: 2 x 10-4/°C Internal discharge device: - Internal discharge resistors reducing the residual voltage to 75 V in 10 minutes after disconnection of the supply Frequency: - Standard: 50 Hz (60 Hz on request) Reference standards: - French: C 54 102 - International: IEC 871.1 and 2 (supply capacitors) IEC 110 (air or water-cooled capacitors for induction furnaces) - German: VDE 0560/4 VDE 0560/9 - British : BS 1650 - Other standards on request