ABB VD4 Installation And Operating Instructions Manual page 9

M E D I U M V O LTA G E P R O D U C T S
5.1.1 Available versions
VD4 circuit breakers with lateral operating
mechanism are available in the following versions:
• fixed, with rh lateral operating mechanism and
230 mm pole center-distance
• fixed, with lh lateral operating mechanism and
230 mm pole center-distance
• fixed, with rh lateral operating mechanism and
300 mm pole center-distance
• fixed, with lh lateral operating mechanism and
300 mm pole center-distance
• removable, with rh lateral operating mechanism,
version for UniSec switchgear, 230 mm pole
center-distance
• removable, with lh lateral operating mechanism,
version for UniSec switchgear, 230 mm pole
center-distance.
Depending on the version, they can be equipped
on request with two or three current sensors and
with a REF 601 series device for protection
against overcurrents.
5.2 Reference Standards
The VD4 circuit breakers conform to standards IEC
62271- 100, CEI-EN 62271-100 and those of the
major industrialized countries.
5.3 Fixed circuit breakers
The fixed circuit breaker (fig. 4) is the basic
version complete with structure and front
protection shield. There are two drilled supports
in the lower part of the structure to allow the
circuitbreaker to be fixed.
The terminal box (10) is available for the electrical
connections of the circuit breaker's auxiliary
circuits.
The earthing screw is located in the rear part of
the circuitbreaker. See the key to figure 4 for
further details.
9