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High Voltage Capacitors

Compensation is recommended for the power systems like capacitor bank, automatic capacitor bank, used for energy distribution or to feed H.V machines, where consumer could avail return on investment within a shorter period. High voltage power capacitors are meant for power systems where network voltage is more than 1 kV.

High voltage capacitor banks are mainly installed in the following type of applications:

Cement factories.
Electric arc furnace installations.
Chemical and petro-chemical plants.
Water pumping stations.
H.V motor centers.
Water purification plant.
Desalination plants.
Wind farms.
Airports.
Power generating stations and mini power generating stations.
Transmission centers / Sub – stations.
Paper manufacturing units.
Electric power distribution companies.
Large industries in general.

Electronic Capacitors

High Voltage capacitor units for power factor correction and harmonic filters are enclosed in metal containers fitted with porcelain capacitor bushings. Basically these are of two types:

Single Phase(One or Two Bushings) capacitor units with internal element fuses suitable for connection of power system network of 11 kv and above or with high voltage power machines.
Three phases(Three bushings) capacitor units with internal element fuses for connection to power system bus bars or equipments with voltage rating preferably less than 11 kv.

Construction: The internal construction of a capacitor unit constitutes a group of single phase capacitor elements of suitable capacity. A number of such elements are connected in series-parallel to obtain designed power & voltage ratings. The number of groups of elements connected in series determines the voltage ratings and the number of parallel elements in a series group determines the power(kva) rating of capacitor units. The capacitor units are manufactured with " All film technology". Capacitor elements are wound with bi-axally oriented hazy polypropylene films of low losses and extended aluminium foils. This technology has replaced the previous paper films, (mixed di-electric) capacitors to reduce di-electric loss considerably. The capacitor losses are as low as 0.15 W/kva and in addition in case of an internal short circuit, the risk of case rupture and explosion is also avoided. In conventional capacitors, paper produced gases of abnormal level raises the internal pressure to dangerous level.

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Automatic Capacitor Banks

High voltage automatic power factor correction banks are suitable for plants and installations, where load on the power system is fluctuating. In this type of bank, the total kva is divided into a number of steps equal or unequal- depending upon the load conditions. The capacitor steps are switched in or out through a contactor, controlled by a power factor controller of type MCX. If a discharge coil (Voltage Transformer) is connected along with the steps, the discharge time of capacitors get reduced to 10 seconds (otherwise it is 10 minutes). This would enable rapid reconnection of steps. These banks are equipped with:

Sheet metal enclosure.
H.R.C. Fuses for capacitor steps with fuse failure indication.
Vacuum contactor or SF6 circuit breaker.<
Inrush current limiting reactor (inductor).
H.V. Capacitor units of single phase or three phase AB LIFASA with internal element fuses.
Control box with power factor controller and indications.

Product Range:

50 kva to any rating as per the requirement of customer.
Voltage rating up to 36 kva.

Designs and specifications: With vast knowledge and experience available in AB lifasa, we are capable of working out a technically and economically viable power factor solution for each type of installation.

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Mr. Alok Kumar (Director)
Gat No. 258/1, Plot No. 8/2, Village Khalumbre, Chakan - Talegaon Road, Tal. Khed, Near Lohr Tsi Compound
Pune, Maharashtra - 410 501, India
Telephone:+(91)-(2135)-613500/ 613502/ 613503

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