The new, even more efficient KLV capacitor!

Tuesday, 29 January 2019

INTRODUCTION

PFC (power factor correction) high voltage KLV capacitors are capacitors designed for reactive power compensation of electrical networks and industrial plants. Usually, capacitors are integrated into shunt capacitor bank systems.  Efficient use of energy is an increasingly important factor. By using appropriate equipment, we can ensure better quality and more efficient operation of systems.

Most electrical devices, such as asynchronous motors, transformers, chokes, induction heating furnaces, welding devices, fluorescent lamps, and many others, don’t need only active power but also reactive power for their operation. Because of these inductances, the system current lags behind system voltage. As the lagging angle between voltage and current increases, the power factor of the system decreases. If the power factor decreases, and active power demand remains, the system requires more current from the power source. That results not only in additional costs for energy supply but also in additional loads on transmission lines and other contact elements.

GENERAL INFO

High voltage capacitors are composed of partial capacitances (sections) generally connected in several serial-parallel groups used to obtain the required electrical characteristics for the unit:

•    the nominal voltage of a capacitor depends on the number of groups in series,
•    the nominal power of a capacitor depends on the number of partial capacitances in parallel per group.

Each elementary capacitance is produced using two aluminum foils forming the electrodes and high-quality polypropylene films which are rough for easy impregnation, forming part of the insulating layer.

The wired capacitance assembly, called the "active pack" is positioned in the container and equipped with porcelain bushings used to connect the device.

After it has been dried and treated, the "active section" is impregnated under a vacuum with a liquid dielectric of the following type:

•    non-chlorinated (NON-PCB),
•    non-toxic,
•    environmentally compatible.

With the polypropylene film, this liquid dielectric, which has remarkably high chemical stability, high gas absorption and partial discharge quenching capacity and a flash point of approximately 150°C, ensures total insulation between electrodes.

This "All-film" technology has the following main characteristics:

•    high resistance to strong electrical fields,
•    Low power losses, enabling considerable savings for high power capacitor banks. 

FEATURES

•    all-film technology
•    NON-PCB, non-toxic, environmentally compatible impregnating oil
•    hazy polypropylene dielectric
•    extended foil 
•    folded foil design
•    soldering directly to the aluminum foils
•    low losses capacitor, with high resistance to strong electrical fields 
•    dimensions and shape could be modified according to existing units 
•    European quality and design

New capacitor from KLV family: KLV3221P 667kvar 6930V 50Hz

New KLV3221P 667kvar 6930V 50Hz is designed with reduced dimensions of the case and increased power per unit. The advantage of this unit is a lower number of capacitors for shunt capacitor bank, what means lower costs and better efficiency of the bank, as well as lower weight for the same power.