Low Voltage (up to 600V) Capacitor Banks
The JRS Power Factor Correction System has many advantages over installation of individual capacitors:
- greatly reduced installation cost over installation of many small capacitors
- switched capacitor steps are closely matched to the varying power requirements and load diversification, often resulting in a lower total of capacitors being installed since individual loads can vary greatly
- future addition to the system is simplified
- monitoring of power factor may be done from a central location
The vast majority of electrical loads require "detuned" power factor systems due to harmonic distortion in the system. JRS power factor correction systems are designed with series reactor/capacitor stages to prevent resonance.
For more information you can download our brochure in PDF format. |
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Capacitors
- Individual long life 12.5 Kvar oil impregnated metallized paper with polypropylene barrier
- 200,000 + hour rated life
- losses of less than 0.3 watts per Kvar at terminals due to efficient design
- Exclusive 5 year failure guarantee
- Maximum continuous current to 150% of rated current and 110% of rated voltage without significant effect on life
Oil Impregnated Metallized Paper Capacitors
Dielectric
The dielectric of these capacitors takes the form of a low-loss polypropylene foil immersed completely in insulating oil. Paper sheets, which are metallized on both sides, serve as electrodes. These capacitors are dried and impregnated in high vacuum.
Advantages of the this technology:
- The vacuum drying and impregnation procedure free the dielectric of any voids and minimize the occurrence of partial discharges. This results in long life-expectancy and extremely stable electrical characteristics.
- The zinc contact layer forms a stable contact with the paper sheets and guarantees a very high resistance to impulse charges (a characteristic well-known from the Metallized paper-capacitor) reducing the self-inductance of the capacitor.
- Extremely low losses through the application of polypropylene dielectric and the metallization of both sides of the paper.
- The paper facilitates effective disposal of the products of decomposition, produced as a result of self-healing breakdown. This improves the self-healing qualities of the capacitor.
- Thanks to its low losses and the heat dissipation qualities of the oil Impregnate, the capacitor may be operated at high ambient and case temperatures up to 70°C without affecting the life of the capacitor.
- These power capacitors are particularly suited for use in detuned capacitor equipment.
| This dielectric is preferred for highly stressed AC capacitors. |
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Self-Healing Dielectric:
The dielectric structures are "self-healing": In the event of a voltage breakdown, the metal layers around the breakdown channel are evaporated by the temperature of the electric arc that forms between the electrodes. They are removed within a few microseconds and pushed apart by the overpressure generated in the centre of the breakdown spot. An insulation area is formed which is reliably resistive and voltage proof for all operating requirements of the capacitor. The capacitor remains fully functional during and after the breakdown.
- Harmonic Reactor
- Separate three phase iron core reactor for each module
- Capable of dissipating heat generated from harmonic currents
- Capacitor Step Tray Assembly
- Slides into place to facilitate future additions to the system or servicing
- Ventilated for flow through cooling
- Contactors
- Rated for capacitor switching duty
- Built-in inrush resistors
- Enclosures
- Modular sprinkler proof design
- Easy to add future stages or structures to allow system to grow