High Voltage Capacitors One-Phase Units have all-film dielectric and are impregnated with dielectric liquid which is environmentally safe. Each capacitor element has a separate internal fuse. In addition each capacitor is provided with an internal discharge resistor. All capacitors have low losses and are constructed to be light in weight. The high voltage power capacitors comply with most national and international capacitor standars.

HARMONIC DISTORTION-AN INCREASINGLY COMMON PROBLEM

Harmonic distortion problems are becoming increasingly common and, ironically, the cause can traced back to the 'electronic revolution'. Modern electronic power control devices provide many advantages over conventional control methods, and are widely used in industrial processes. Their major disadvantage, however, is that they also generate distorting harmonics.
Problems are most often caused by the 3rd, 5th,7th, 11th and 13th order harmonics. High frequency harmonic currents often give rise to unexpected problems. Excessive heat loss occurs in transformers, cables, and other components. Control, protection and metering systems fail to function as required. Telecommunication and data networks are subject to interference and disturbance.

Particular problems are experienced when the network contains power factor correction capacitors. The capacitor bank and the inductance of the network itself may form a parellel resonant circuit at the harmonic frequency, with the result that harmonics are amplified to such an extent that the voltage becomes unsuitable for most applications. With increasing reactive power charges, adequate compensation has become an economic necessity. Power factor correction systems pay for themselves in only 12-36 months through reduced costs. In many countries regulations concerning the quality of electricity supplies also sets limits on the amount of distortion permitted.

HARMONIC FILTERS KEEP THE SYSTEM "CLEAN"

Harmonics filters represent the optimum solution to distortion problems. Consisting of capacitors, reactors and resisters, filter circuits provide a low impedence route out of the system for harmonics. Distortion is reduced to the required levels. Single-tuned, double- tuned and high-pass filters are all available. At the fundamental frequency (50 or 60 Hz) the filter acts as capacitor and produces reactive power, functioning in the same way as a conventional capacitor bank.

For the results, the capacitor and reactor must be properly matched. Nokian Capacitors is the only filter manufacturer in the world with its own capacitor and air-core reactor production. Nokian Capacitors filters contain perfectly matched components for trouble- free operation.

Nokian Capacitors manufacturers dry-type air-core series reactors, damping and filter reactors to be used in conjunction with capacitor bank. Reactors are also manufactured for other applications. Reactors are designed using very latest technology and require little maintenance and are easy to install.

DAMPING REACTORS FOR CAPACITOR BANKS
The transient switching and inrush currents of a shunt capacitor bank can be limited by a damping reactors connected in series with the bank. Damping reactors are comparable to series reactors with low reactances. Their voltage strength requirements, however, are often higher than those of series reactors. Our damping reactors are used all over the world in various environmental conditions.

CURRENT-LIMITING REACTORS
Current-limiting reactors are mainly used to limit short-circuit current, i.e. to prevent fault currents from rising to values dangerous for the equipment. Normal types of breakers, cables and equipment can thus be used instead of those with higher short-circuit power rating. This means savings in money. The voltage drop is determined practically only by the reactance of a series reactor, and it can be stated.