Products


Capacitor types used in ICAR power factor solutions

All ICAR power factor correction systems are realised employing capacitors exclusively produced within the group.

Capacitors are classified according to three types:

 

Standard polypropylene capacitors : made with traditional metallised polypropylene.  Such capacitors endure the standard level of stress of the fixed power factor correction banks they are employed for.  Three different nominal voltages available:

- Vn=400V; used in fixed power factor correction banks (SP10 and SP20 Standard Polypropylene ranges)

- Vn=460V; used for reinforced fixed power factor correction banks (Reinforced Polypropylene RP10 range)

- Vn=550V; used in double reinforced fixed power factor correction banks (Reinforced Polypropylene RP20) and in fixed power factor correction banks with harmonic blocking filter reactors (Filter Detuned FD20 and FD30) .

 

-Condensatori in polipropilene metallizzato ad alto gradiente: sono realizzati avvolgendo film di polipropilene metallizzato con spessore variabile. Sono condensatori con un ottimo rapporto qualità/prezzo, poiché la metallizzazione a spessore variabile garantisce elevate prestazioni di potenza per unità di volume (kvar/dm3), elevata tenuta alle sovratensioni ed alle sollecitazioni dei transitori di carica/scarica del condensatore, maggiore affidabilità. Questi condensatori esistono in tre diverse tensioni nominali
-Vn=415V; utilizzati per rifasatori automatici in applicazioni standard (famiglia High density metallised Polypropylene HP10)
-Vn=460V; utilizzati per rifasatori automatici rinforzati (High density metallised Polypropylene HP20)
-Vn=550V utilizzati per rifasatori automatici doppiamente rinforzati (High density metallised Polypropylene HP30) e per rifasatori con induttanze di blocco armoniche (Filter High Detuned FH20 e FH30)

High density metallised polypropylene capacitors : made with special metallised polypropylene film. These capacitors make a good value for money option, as this metallisation guarantees high power per volume unit (kvar/dm3), high overvoltage withstand and high endurance to stress caused by capacitor charge/discharge transients, and higher reliability.
Three nominal voltage available options:

- Vn=415V; used in automatic power factor correction banks for standard applications (High density metallised Polypropylene HP10 family)

- Vn=460V; used in reinforced automatic power factor correction banks (High density metallised Polypropylene HP20)

- Vn=550V; used in double reinforced automatic power factor correction banks (High density metallised Polypropylene HP30) and in power factor correction banks with harmonic blocking filter  reactors (Detuned fiters FH20 and FH30)

 

Capacitors in bi-metallized and impregnated paper: those are extra sturdy capacitors made wrapping a thin sheet of special metallized paper on both the sides (armor) and a film of pure  polypropylene (dielectric). This technology is the strongest on the market nowdays, able to bear, in addition to the most severe electrical stresses in terms of harmonics and current transients, even the worst thermic situations (plants with a duty cycle of 24/24, 356 per year, switchrooms without any air conditioning system, etc.). They can operate up to 85° C sorrounding air temperature and with considerably high current stress. These capacitors, which have a remarkable stability over the time of capacity, come in different voltages:

-Vn= 400V; ideal for heavy duties arising from the presence of harmonics, electrical and thermal stress (group “3In” TC10 capacitor banks)
-Vn= 460V; for applications such as the above one but also for surges («3In» TC20), and power factor correction systems with harmonic blocking reactors (Detuned FD25)
-Vn= 550V/660V/750V/900V; for power factor correction banks with harmonic blocking reactors (Detuned FD25) and special applications.

--Comparison between the performances of the different capacitor ranges according to the construction technology: the characteristics of the capacitors are summarized in the following table.

 



ICAR capacitor type Working life (1) ⌂C/C yearly (2)
Overvoltage endurance Current ammissibile overcurrent (3)  Peak withstand current (4)  Working reliability Maximum Temp. (5) 
Standard polypropylene optimum low good good good good 55C°
High density polypropylene optimum low excellent optimum optimum optimum 55C°
Bi-metalized paper excellent negligible optimum excellent excellent excellent 85C°

Notes:

(1) At rated voltage, current and temperature (without harmonics)
(2) Loss of capacity (average for year of operation)
(3) Electric current RMS, included harmonic currents
(4) Peak current as a result of transient phenomena in the network
(5) Temperature, measured by the capacitor at 10cm