Limitations of Current Limiting Protectors for Expansion of Electrical Distribution Systems, 1996 Process Control, Electrical & Info. Conference Proceedings
Application of current limiting protectors (CLP’s) has been recommended in the existing literature to retain underrated medium voltage circuit breakers of lower short-circuit ratings in service, when the distribution systems are expanded and the short-circuit currents increase. However, the existing published literature does not describe the limitations of CLP’s from system separation and loss of protective device coordination conditions, nor it provides an analysis of short-circuit duties of medium voltage circuit breakers used with CLP’s. The paper shows how these evaluations can be carried out. Considerations of high cost of replacements, the far greater loss of production due to lack of coordination and availability of a proven alternate solution should be included in an informed decision to use CLP’s. ‘CLP’, ‘triggered fault current limiter (TCL)‘, ‘CLIP’, and ‘I, Limiter’ are synonymous.
Limitations of Current Limiting Protectors for Expansion of Electrical Distribution Systems, 1996 Pr
