Leading
solutions in Power Factor Correction Systems, High Performance LV Cylindrical Capacitors,
Power Factor Relays, Harmonic Filters, Capacity Duty Contactors, and Modulesfor Capacitor Banks. |
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Cylindrical
Capacitors. |
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FRAKO Power
Factor Correction Capacitors are components with very high power density. 15 kVar reactive power can be housed in 1000 cm². This is achieved by a very low loss factor and high utilization of dielectric. However, in order to attain a high life expectancy, partial discharges (these are negligible electrical discharges inside the dielectric) must be supressed. This is achieved by using a flame inhibiting mineral filler. Technical Remarks: For the operation of power capacitors three aspects are of utmost importance. - high overload capacity. - long life expectancy. - safe reaction at overload and during possible breakdowns. Current Load Capacity: In networks polluted with harmonics you can expect overvoltages and in particular a higher RMS current load when resonances occur. if, for example, approx. 7% of the 11th harmonic occurs, then the voltage is 7% higher; the actual value of the capacitor current, however, is 1.33 times the rated current. For this reason a high current load capacity is even more important then the volatage load capacity. At 400 VAC mains voltage FRAKO uses only power capacitor rated at 440 VAC. their permissible current load capacity is: - 2 times the rated current at 400 VAC / 50 Hz permanently. - 350 times the rated current at 400 VAC / 50 Hz during short peak currents. Life Expectancy: Extreme purity of the material used prevent a deterioration of the loss factor and thereby a reduction of the dielectric strength and the current load capacity. The very low number of failures in the field prove an exceptional high life expectancy. Field reports received over the last 10 years point to a failure rate of less than 1% in 15years of operation. Safety Features: FRAKO Power Capacitors offer the highest safety with an overload disconnector, which activates at internal overpressure, disconnects the capacitor from the mains and thereby prevents capacitor destruction. FRAKO carriers out the tests and regular random tests to monitor the production safety of this function. The test conditions comply with IEC 831 standards. FRAKO Power Capacitors offer, therefore, the highest possible standard of safet at overload and at the end of their life time. Application: FRAKO capacitors allow power factor correction installation to be constructed for any requirement and meet the regulations of VDE 0560 part 41, EN 6083-1 and IEC 831 - 1 and 2. FRAKO holds the Management System Certificate ISO 9001 and the Environmental Management System Certificate ISO 14001. Mechanical Constructon: Cylindrical aluminium case, dielectric consisting of metallized polypropylene foil. Dry type, filled with a flame inhibiting, stabilized mineral filler. The dielectric is self-healing. In case of a breakdown caused, for example, by voltage over- load, the self-healing effect takes place. If the self-healing process does not operate (e.g. because of voltage, current or thermal overload) the cover plate, which is designed as an overload valve, is raised and ruptures the internal connecting wires to the coils, so that the capacitor is disconnected from the mains. Design: Cylindrical aluminium case, with mounting stud M 12 x 12 Three-phase capacitors with integrated discharge resistor. Rating: 2.5 - 25kVar at 400V / 50Hz. Capacitance and Rating Tolerance: +/- 5% Power Loss: Approx. 0.05 % (0.5 Watt/kVar) measured at the connecting terminal including discharge resistors. Approx. 0.02 % (0.2 Watt/kVar) measured at the capacitor coils. Temperature Class: - 40 °C to + 60 °C Discharging: According to IEC 831, every power capacitor must have a discharge device which guarantess a discharge to 75 VAC within three minutes. FRAKO capacitors have integrated discharge resistors which guarantee a discharg to 50 VAC within one minute. Voltage Load Capacity: FRAKO Power Capacitors have a load capacity in accordance with VDE 0560, part 41. |
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Rated
voltage |
440 VAC |
480 VAC |
525 VAC |
610 VAC |
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8
hours daily |
484 VAC |
528 VAC |
578 VAC |
671 VAC |
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30
min daily |
506 VAC |
552 VAC |
604 VAC |
702 VAC |
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5
min |
528 VAC |
576 VAC |
630 VAC |
732 VAC |
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1
min |
572 VAC |
624 VAC |
683 VAC |
793 VAC |
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Cylindrical
Capacitors |
Power
Factor Control Relays |
Harmonic
Filters |
Capacitors
Duty Contactors |
Modules
For Capacitor Bank |
Automatic
PFC Banks |

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