50
50
1
3
2
7.8. Earthing
Earth the fixed version circuit-breaker by means of the special
screw marked with the relative symbol.
Clean and degrease the area around the screw to a diameter
of about 30 mm and, on completion of assembly, cover the
joint again with Vaseline grease.
Use a conductor (busbar or braid) with a cross section
conforming to the Standards in force.
7.9. Connection of the auxiliary circuits
Note: the minimum cross section of the wires used for the
auxiliary circuits must not be less than the one used for the
internal wiring. Furthermore, they must be insulated for 3 kV
test voltage.
7.9.1. Socket wiring Kit
The eVD4 socket wiring kit allows simple and rapid
construction of the panel wiring part. It consists of:
– 58-pin socket pre-engineered for Ethernet electric ports (1)
– Cables 1.5 metres long with 2.5 mm
2
cross section copper
cables for the power connections and with 1 mm
2
cross
section for the signal connections
– Serial cable 1.5 m long for the signal connection with the
HMI fitted with special connector on the end (2)
– 2 Ethernet connection modules 1.5 m long with cylindrical
connector on the socket side and RJ45 connector on
the other end. Allows easy integration of the eVD4 in
communication systems based on Ethernet (3)
Fig. 10
eVD4 circuit-breaker for UniGear switchgear and PowerCube units.
Fig. 11
7.9.2. Withdrawable and fixed circuit-breaker
The auxiliary circuits of the withdrawable and fixed circuit-
breaker are fully factory-wired up to the connector (fig. 11).
For external connections, refer to the electric wiring diagram
of the switchgear.
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