LOW VOLTAGE CAPACITORS Type ALPIVAR
We offer capacitors which are totally dry units with no impregnation or insulation liquid and is a patented design. They are designed by assembling individual single-phase coils, coupled in a delta arrangement to obtain a three-phase unit.
The coils are produced from two films of polypropylene with zinc plating on one side:
• The metal plating forms the electrode• The polypropylene film forms the insulator.
Features of vacuum technology capacitors
Casing: Non Inflammable- self extinguishing Polyurethane resin-resistant to all solvents and atmospheric agents such as Rain, Sun, Salty Air etc.
Insulation: Double insulation-6kv/25kv level (Class 2) -No earthling needed. Provides total safety for personal.
Modular: The modular design facilitates quick and easy assembly of individual units to obtain various Kvar outputs.
Ambient temperature: -40/+55° C for all powers
Permitted casing temperature: 80°C max (anywhere on the case)
Watt losses: Less than 0.3W/kvar including discharge resistance
Max admissible voltage:
Ucn+18 %( 24 hours daily permanently)
Ucn+20 %( 18 hours daily)
Ucn+30 %( 12 hours daily)
Ucn+50 %( 8 hours daily)
Max admissible current: 2 times nominal current permanently
Inrush current withstand capability: 400 times nominal current
Statistical life expectancy: 15000 hours –continuous operation
Internal protection for each coil:
Self healing dielectric:
Internal Electrical fuse :( One per coil)
Over pressure disconnecting device (One per coil)
These three protection mechanisms associated with the under vacuum coated coils (Patented Technology) makes it a highly advanced unit.
No risk of fire and explosion
No PCB or impregnation liquid
Dielectric: Polypropylene film, Zinc metalized-(progressive film)
Test voltage/terminal-terminal: 3.10 Un, AC-10 seconds
Power connection: Internal connections completely welded and drowned under vacuum in the Resin. No risk of oxidization and therefore no contact resistance.
Mounting position: Any position-Totally dry-Liquid free.
Capacitors comply the following standards.
• French Standard-NF C54 108 & 109
• European Standard-EN 60831-1 & 2
• International Standard-IEC 60831 -1 & 2
• Canadian Standard- CSA 22-2 No.190
• US Standard- VL180
• End of life behavior tests passed successfully in EDF &LCIC Laboratories.
MEDIUM VOLTAGE CAPACITORS
ELTEC also offers medium voltage capacitors and capacitor banks. Medium voltage capacitors are of two types
Synthetic "all-film" type dielectric capacitors are composed of elementary or partial capacitances generally connected in several series-parallel groups, providing the required electrical characteristics for the unit.
number of partial capacitances in parallel per group
Synthetic "all‑film" type dielectric capacitors have a much longer service life, due to:
- A high partial discharge absorption
- High dielectric resistance to transient
over currents and over voltages
- A very low variation of capacitance as a
function of temperature Medium voltage CAPACITORS
Capacitors for induction furnaces are custom designed according to the requirements and characteristics of the installation