Static capacitor banks: a reality

admin | 10 de February de 2015


For many years now, power factor correction has been one of the first steps to improving the energy efficiency of installations. Since their beginnings, compensation techniques have grown and developed over the years, adapting to new needs (basically the types of loads that must be compensated) and to new technologies that have become available.

At first, the most common compensation technique was to use capacitor banks with contactor operation. This compensation system is optimal for balanced systems and to compensate loads with connection and disconnection rates that are not too fast, on the order of seconds, and it is currently the most common system in most installations despite increasing numbers of unbalanced installations.

The passage of time and the growing use of more dynamic loads in many installations has led to the emergence of a new technique: the use of static contactors (solid-state relays or thyristors) to operate the capacitors in a capacitor bank. This technique has a set of important advantages over compensation with contactor operation:

In the early days of this new technology its main drawback was its high price, which meant that investing in this type of unit necessitated long repayment periods for most companies, making it difficult to justify the expenditure, even more so if compared to traditional compensation with contactors.

FO OPTIM EMS-C 250x250

CIRCUTOR was a pioneer in developing the technology used in static capacitor banks and has included them in its catalogue for more than 20 years, making the company a leader in this technique within the electricity market. In recent times, significant R&D efforts have been made to adapt the new emerging technologies to this compensation technique, developing a new range of static capacitor banks that drastically reduce the price difference between the two compensation systems (contactors / thyristors), thus eliminating the main obstacle to choosing a static capacitor bank as a compensation method.

To this end, CIRCUTOR has launched the new range of EMS-C static capacitor banks which are ideal for industrial applications, such as arc welding, compressor start-up, cranes and hoists. But they are also suitable for the service sectors, such as compensating lifts in communities of residents, given that the traditional contactor technique does not compensate them well due to their quick input and output rate.

Thanks to minimising the cost difference between classic compensation with contactors and advanced static compensation, CIRCUTOR has turned the choice of a static capacitor bank from a technical whim to a tangible reality within the reach of all budgets.


More information about OPTIM-EMS-C Series. Automatic capacitor banks with static contactor


Documentation about Automatic capacitor banks


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