Capacitors that have been stored in their original packing should be reformed according to the standards by applying rated voltage via a series resistance of approximately 100 (for VR ≤ 100 V DC) or 1000 (for VR > 100 V DC) for a period of one hour.
For aluminum electrolytic capacitors, rated voltages of 100 V are usu-ally designated as "low voltage" and rated voltages >100 V as "high voltage". For details, refer to chapter "General technical information, 15 Structure of the ordering code (part number)", page 39.
The capacitors listed in the databook can be operated continuously at the full rated voltage (includ-ing superimposed AC voltage) within the entire operating temperature range. The permissible voltage range for continuous operation lies between the rated voltage and 0 V.
In most applications, aluminum electrolytic capacitors – as poled devices – are used with a DC volt-age bias of proper polarity with some superimposed AC voltage. Reverse polarities of up to 1.5 V are permissible for short periods of time as the formation of a damaging oxide layer on the cathode only starts at voltages of this magnitude.
For this purpose, the rated voltage is applied to the capacitors via a series resistance of approxi-mately 100 for VR 100 V DC, or 1000 for VR >100 V DC, for a period of one hour. Subsequently, the capacitors are stored under no-voltage conditions for 12 to 48 hours at a tem-perature between 15 and 35 °C.
their operation if a capacitor bank fails. These can range from disrupted operations, expensive and unbudgeted repair or replacement costs, ut nsitive equipment to trip or fail, due to: Sustained or intermittent network voltage drop cause by reactive loads e.g. high-reactive current motor starts leading t