Poor Power Factor Boosted – Industrial Electrical Problems

Electrical engineering root cause analysis (RCA) related to poor power factor boosted as P.F was very low in an electrical substation.

Article Type:Root Cause Analysis (RCA)
Equipment Type:Motors
Author:S. Raghava Chari

Note: This root cause analysis (RCA) is from real-time scenarios that happened in industries during the tenure of two or three decades ago. These articles will help you to improve your troubleshooting skills and knowledge.

Poor Power Factor Problem

The power factor was low around 0.7 due to 50% loaded transformers feeding induction motors.

The State Electricity Board (SEB) threatened to discontinue the power supply of the PF if it is not raised to the statutory minimum 0.8 

Solution & Benefits

Capacitor Bank
Capacitor Bank

Two capacitor banks installed on the 11-KV bus improved the power factor to > 0.9 and met the statutory requirements. About 10% less power bill is a bonus benefit.

Author: S. Raghava Chari

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