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CORRECTION: The Legacy line of circuit breakers is now obsolete for I-Line busway plugs. The Powerpact breakers are now utilized, selection based on SCCR rating and trip unit required.
See the current online Digest for the current selection of these devices.
What circuit breaker type is used in PFA, PKA, PBLA, and PTMA busway plug-in units?
I Line Busway, busplugs
Replacement breakers for busplugs
The intermittant tripping issues and worn parts
FAP for PFA plug-in unit
KAP for PKA plug-in unit
LAP for PBLA plug-in unit
MAP for PTMA plug-in unit
The KAP nad MAP breakers above are obsolete and no longer available.