Capacitor overcurrent protection for industrial distribution systems

Many industrial facilities apply power correction capacitors to enhance their electrical efficiency. Power factor improvement, power loss reduction, release of system capacity, and voltage improvement can all be achieved by applying capacitors in industrial plants. Protection of these capacitor bank...

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Bibliographic Details
Main Authors: Mendis, S.R., Bishop, M.T., McCall, J.C., Hurst, W.M.
Format: Conference Proceeding
Language:English
Subjects:
Industrial plants
Industrial power systems
Power capacitors
Power factor correction
Power harmonic filters
Power system harmonics
Power system protection
Power system transients
Reactive power
Voltage
Online Access:Request full text
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Summary:Many industrial facilities apply power correction capacitors to enhance their electrical efficiency. Power factor improvement, power loss reduction, release of system capacity, and voltage improvement can all be achieved by applying capacitors in industrial plants. Protection of these capacitor banks against excessive overcurrents is a critical part of the safe and reliable operation of the bank. This paper reviews different considerations in the selection of capacitor fuse applications and the philosophies behind them. Individual and group fusing are discussed. Continuous current, transient current, fault current, tank rupture curve coordination, voltage on good capacitors during a fault, energy discharged into a failed unit, outrush current, and coordination with unbalance detection schemes are topics covered. Examples of actual applications of capacitors in industrial distribution systems are presented throughout the paper.< >
DOI:10.1109/PCICON.1994.347606