The Challenge
A manufacturing facility's monthly electricity bills included a 'power factor adjustment' surcharge that varied ₹65,000–₹85,000 monthly. The facility's power factor was consistently 0.70–0.75.
What Became Visible
Real-time power factor monitoring revealed that reactive power consumption was driven by four large induction motors and two welding stations. These assets operated with inherently low power factors (0.60–0.70) without correction. The reactive power surcharge was 14% of the total electricity bill — approximately ₹8.4 lakhs annually — purely for power the facility was consuming but not using productively.
What Changed
Automated capacitor bank installed with automatic switching. Reactive power compensation deployed at point of use for the two largest loads (welding station, main motor).
How it worked: The facility installed a 200 kVAR automated capacitor bank at the main switchboard to correct bulk reactive power. An additional 50 kVAR fixed capacitor was installed at the welding station transformer. Within 4 weeks, facility power factor improved from 0.72 to 0.96. Reactive power surcharges dropped to near zero. As a secondary benefit, overall consumption dropped 9% — better power factor allowed motors to draw less current to deliver the same mechanical power.
Results
within 4 weeks
annually eliminated
from improved efficiency
extended equipment life
Power factor penalties are the most invisible part of the electricity bill — they're utilities charging for power you're consuming but can't use. Correction equipment costs ₹2–4 lakhs but saves ₹8–15 lakhs annually. The ROI is immediate.
Operational Reality
Most facilities with power factors below 0.85 are losing ₹5–20 lakhs annually to reactive power penalties. The fix is straightforward and has 6-month payback.