Possible problems…

Choose only capacitors that are designed and tested in accordance with the requirements of international standard IEC 831 Parts 1 and 2. Specify a minimum voltage level of 525Volts for use on a nominal 415V 50Hz system.

Power Factor Correction systems designed for use on installations with high harmonic levels (typically caused by variable speed electronic drives, UPS systems, switch mode power supplies and arc furnaces etc.) are “de-tuned” using series reactors to create a circuit tuned below harmonic frequencies. As well as protecting the Power Factor system it prevents the PF system from “resonating” with the supply system. A typical tuning frequency is 189Hz. Under these circumstances capacitors rated minimum 525V with series harmonic detuning reactors are used.

Adequate air movement around capacitors is essential for long life operation. All automatic Power Factor Systems should be forced fan cooled. Cylindrical capacitors, housed in aluminium cases are most suited to the environment and high temperatures found in Australia. This design is the most effective method of dissipating heat from the core of the capacitor.

For Safety, the latest technology, self-healing capacitors with low watts loss that incorporate an over-pressure disconnection device and discharge resistors are used.