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Calculate the annual saving effected

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Reference no: EM131181568

Question 1:

The load on an installation is 800 kW, 0·8 lagging p.f. which works for 3000 hours per annum.

The tariff is Rs 100 per kVA plus 20 paise per kWh. If the power factor is improved to 0·9 lagging by means of loss-free capacitors costing Rs 60 per kVAR, calculate the annual saving effected. Allow 10% per annum for interest and depreciation on capacitors.

Question 2:
A factory takes a load of 200 kW at 0·85 p.f. lagging for 2500 hours per annum.

The traiff is Rs 150 per kVA plus 5 paise per kWh consumed. If the p.f. is improved to 0·9 lagging by means of capacitors costing Rs 420 per kVAR and having a power loss of 100 W per kVA, calculate the annual saving effected by their use. Allow 10% per annum for interest and depreciation.

Reference no: EM131181568

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