L6555
Emax
4/74
Doc. no.
Model
Apparatus
Scale
Page No
1SDH000460R0002
1. Description
1.1. General characteristics
The SACE Emax series of circuit-breakers and disconnectors consists of a steel sheet structure which houses the operating
mechanism, the poles and the auxiliary parts. Each pole, insulated from the others, contains the circuit-breaking parts and the
current transformer of the corresponding phase.
The structure of the poles differs according to whether the circuit-breaker is selective or current-limiting.
The fi xed version circuit-breaker has its own terminals for connection to the power circuit; in the withdrawable version the circuit-
breaker comprises the moving part of the apparatus, which is completed with a fi xed part fi tted with the terminals for connection
to the power circuit of the installation. The moving part and the fi xed part coupled by means of special contacts installed in the
fi xed part.
1.2. External front view of the circuit-breaker
Fig. 1
1
2
3
4
Fixed circuit-breaker
1 PR121, PR122 or PR123
electronic microprocessor-
based release
2 Trade mark
3 Operating and control parts
of the operating mechanism
and release tripped signals
4 Rating plate
1.3. Rating plate
1.3.1. Circuit-breaker rating plate
Switch example
Fig. 2a
1.3.2. Disconnector rating plate
Circuit-breaker example
Fig. 2b
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