FAQs (Frequently Asked Questions)

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Why trust CISAR ?

CISAR is synonymous with quality and reliability. We are applying this value to all products, regardless of the type of installation that are intended, or whether it is a much smaller equipment, medium and large.
CISAR is synonymous with experience. True specialists in power factor correction and harmonics, with a corporate history of more than 30 years.


What kind of company needs a capacitor bank ?

Until recently, the user of a capacitor bank has been primarily industrial or tertiary sector of medium-large size.

In the current legislative framework on energy cost pricing in three-phase electrical systems, there is no minimum contracting power from which a user is charged for reactive energy consumption.

That is, anyone with a three-phase installation, in any mode of billing Low Voltage may be penalized for reactive energy consumption should not be compensated installation with an automatic capacitor bank

In short, it means that now any small business, commerce, community neighbors, etc. until recently member of the group of so-called low-power customers, you may need a capacitor bank to remove reactive energy surcharge on the bill.

For large consumers or companies that contract in form of “High Voltage” must be borne in mind that, in addition to compensating reactive power centralized basis, must also offset losses transformer with a fixed capacitor on its side of BT, and in these cases the transformer is owned by the company and therefore it is your responsibility to improve efficiency compensating reactive power in the low voltage winding.

An automatic capacitor bank is equipment able to detect the presence of inductive reactive energy in an electrical system, and by connecting capacitors get their groups capacitive reactive power needed to remove it.

Capacitor banks are essential elements to reduce the energy cost of an installation. Improved electrical performance and contribute to the reduction of CO2 emissions into the atmosphere.


Harmonics in the grid … what to do?

Increasingly frequent problems caused by high harmonic distortion in an electric network, caused by the growing and essential use of frequency converters, soft starters, electromagnetic induction furnaces, electronic lightings, UPS, etc.
If these problems are not addressed properly mainly cause these effects on the electrical system: transformer saturation voltage drops increase the circulating current through the neutral shot differential overheating in the early exhaustion of the capacitor banks Harmonics can drivers “enter “for two places: 1. from the user’s own installation using load elements” nonlinear “above. 2. On the outer line in the case of transformer share with other users and be these harmonic generators. How should we act? You have to perform a complete measurement of harmonics with a network analyzer to determine:

  • level of harmonic distortion in current and voltage (THDi% / THDu%)
  • type / s of harmonic / s dominant / s
    (both values are very important because they determine the type of three-phase capacitors and inductors that must be used)

Medicion de armónicos

In these cases, what is the solution to the problem?

  • Install a capacitor bank with filters to LOCK and harmonic rejection
  • Install a fixed capacitor filters to LOCK and harmonic rejection to compensate for transformer losses.
  • Install a filter of absorption in the head of the installation to prevent the entry of harmonics coming from outside.
  • Install several absorption filters in each of the harmonic generating lines within the facility itself.

An absorption filter does not replace a capacitor bank, although it owns filters blocking / rejection, and vice versa.