This retrofitting kit is designed for replacing the DB air circuit breaker in DB switchgear. It allows a standard
Emax 2 withdrawable air circuit breaker of the size indicated in Table A and its cradle (fixed part) to be attached
to the original switchgear assembly and racked into the switchgear enclosure.
IMPORTANT !
Retrofitting allows an obsolete control and protection device to be replaced, but does not allow the ratings of the
original switchboard to be altered in any way.
The retrofitting kits are dimensioned and certified for the obsolete device performances which may be lower than the
new Emax 2 ratings. Consult ABB for further details.
Table A
Full correspondence of the electrical characteristics is guaranteed (rated current excluding derating if indicated in
Table A, and breaking capacity) so long as the kit is chosen in accordance with the indications in the ABB technical
catalogues dedicated to retrofitting products. The kit has been designed also to preserve the insertion/extraction
operations functionality and the optional auxiliary (secondary) circuits of the obsolete circuit breaker. The (fixed part)
for the new circuit breaker is installed and then locked into the legacy DB switchgear, thus making use of the
of the Emax 2 plug-in features as established in the operation and maintenance manual of the new Emax 2
circuit breaker without having to modify any of the live parts of the switchgear.
ATTENTION !
The instructions concern the sole assembly of the retrofitting kit. They do not substitute for the instructions in the
installation, operation, and maintenance manual of the Emax 2 circuit breaker document number
1SDH001000R0002. If optional auxiliary (secondary) circuits are required, refer to section 11.
Structure Details
The cradle for the new Emax circuit breaker is mounted to a steel structure that is then mounted into the
DB switchgear cell. The Emax CiC adapter is fitted with custom silver flashed copper run backs and finger
clusters that align to and mate with the existing DB switchgear power circuit stabs. The entire assembly mounts
on the original DB BREAKER L-Frame rails without additional phase barriers. The weight of the low voltage
CiC adapter without the breaker is as follows:
Doc. N.° 2TSA451041P0000 rev A
DB BREAKER TO EMAX 2
2TSA451041P0000
Retrotting between DB BREAKER and Emax 2 circuit breakers with cradle-in-cradle
(CiC) adapter
Table B
RATING
EMAX 2
RATING
DB-25
600A
E-1.2
600A
DB-50
1600A
E-2.2
1600A
Weight (lbs./kg)
CiC Model
1 Pos
3 Pos
DB-25
75/34
90/41
DB-50
90/41
120/55
