Capacitor Range Mpp

Selection of Capacitors
The criteria for selecting capacitors is mainly driven by the following.

Application Based Selection

For Irrigation Pump set
For this application which is mainly in the agricultural sector it is recommended that MPP-D type Capacitors (series 260 D) should be used. This application is relatively simple and the kVAr of the Capacitor may be selected as per table 4.1

For Industrial Use
In industrial applications the application based selection of capacitors must take into account the Harmonic presence in the installation since this is not easy to measure as it is a function of various parameters  some of which are dynamic it is recommended that the following guidelines may be adapted.

If the percentage of nonlinear load is less than or equal to 10% of the total load, standrad MPP-S type capacitors may be used. Fr example-In an installation which has a connected load of 100kW, the non linear load is 7kW. Consequently the percentage of nonlinear load is 7%. Hence MPP-S Capacitors may be used.

If the percentage of nonlinear load exceeds 10% but is less than 20% then heavy duty capacitors must be used since the presence of Harmonics can adversely effect the life of the capacitors. These heavy duty capacitors are MPP-H, MD-XL, MD and FF (APP) types. If  the percentage of nonlinear load exceeds 20% it is recommended that detuned filters. i.e Capacitors + Reactors should be used.

Cost Based Selection

The total cost of using a capacitor is a function of

Purchase Cost

Operating Cost
While purchase cost is easy to estimate it is necessary to also evaluate operating cost as can be seen from the following example. The operating cost of a capacitor is a function of the total losses and the operating time of the capacitor.

Example- An installation requires 1000 kVAr which will be operated for operated for about 6000 hrs per year. Calculate the operating cost of MD-XL capacitors verses MD type capacitors assuming a life expectancy  of 15 years for the operation is calculated as follows.

MD-XL Capacitors
Energy consumed = (loss per kVAr x Total kVAr x operating time) / 1000
= (0.5 x 1000 x 6000 x 15) / 1000
= 45000 kwH

MD Capacitors

Energy consumed
 = (loss per kVAr x Total kVAr x operating time) / 1000
= (1.5 x 1000 x 6000 x 15) / 1000
= 135000 kwH

Consequently the excess energy consumption due to the MD capacitor
Shall Be
= 135000 - 45000
= 90000 kWh

This energy consumed can be converted into cost using a weighted average cost of Rs 5 per kWh. Consequently, the extra cost shall be Rs 5 x 90000 = Rs 450000/-

On a per kVAr base this can work out to Rs 450/- per kVAr. It is obvious that operating cost must be evaluated carefully before taking the final decision on the type of capacitor to be used it is also self explanatory that lower the losses, lower will be the operating cost.

NIE's wide range of power capacitors are manufactured in the most morden manufacturing plant using state of the art technology backed by automated production equipment. Stringent Quality Control procedure ensure world class product performance, safety and cost effectiveness for a variety of applications.

The low voltage capacitors are offered in the following versions