Akd-5, Multi-Source Ground Fault - ABB Emax 2 Installation And Maintenance Manual

Direct/cic replacement of legacy ge ak 600a - 4000a circuit breakers used in akd-5 & substructures

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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.

2TSA451011P0000 Rev-B

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Legacy ge ak 600a Legace ge ak 4000a