B2342
Emax VF
5/66
Doc. No
Model
Apparatus
Scale
Page No
1SDH000909R0001
1. Description
1.1. General characteristics
The SACE Emax series of circuit-breakers 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 sensing resistor of the
corresponding phase.
The fixed 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 fixed part fitted with the terminals for connection to
the power circuit of the installation. The moving part and the fixed part coupled by means of special contacts installed in the fixed part.
1.2. External front view of the circuit-breaker
Fig. 1
1
2
3
4
Fixed circuit-breaker
1 PR122/VF 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
Fig. 2
E2N/VF12 Iu=1200A Ue=1000V
Ue
(V )
Icu
(kA)
Ics
(kA)
690
1000
15
10
15
10
cat.A
50-60Hz
ABB SACE
Italy
Uimp=8kV
Icw(1s)=10kA
IEC 60947-2
The SACE Emax VF circuit breakers can be used in applications with variable frequency from 1Hz to 60Hz, with rated voltage up to
1000V. The rated impulse withstand voltage of the circuit breakers is 8kV.
The SACE Emax VF switch disconnectors up to 2500A are available also in LTT version; this special version, designed for low tem-
perature environment, permits to extend the operating temperature range from -40°C to +70°C.