2TSA451011P0000 Rev-B © 2020 Emax 2 Retrofill Circuit Breakers 600A-4000A | 51
29 - AKD-5, Multi-Source Ground Fault
Retrofills can be used in the following ground fault applications:
Single Source Feeder breakers, 3 wire or 4 wire
Main Circuit breakers, 3 wire or 4 wire
For 4 wire multi-source Ground Fault systems, the Retrofill should be ordered with a neutral
CT adapter. These neutral CT adapters are compatible with MVT style neutral sensors. This
will allow the new breaker to operate with the existing Neutral CT in most cases.
Example: Neutral sensor Cat numbers beginning with TSVG & CT part #’s 139C4970G#’s.
Please note that these neutral CT adapters are not compatible with Power Sensor or SST
style neutral sensors. Replace an SST Neutral CT with a TSVG…BK iron core sensor which
will be compatible with the Neutral CT Adapter.
Note: For 4 wire multi-source Ground Fault systems using Rogowski sensors is more
difficult and requires that an external GF summing CT scheme must be implemented. This
applies to Main—Tie—Main systems or systems with a Main source and then a back-fed
generator source.
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