ABB V-Contact VSC Series, Installation And Service Instructions Manual

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32
A
B
46
45 48 47
!
7.7. Replacement of the contactor fuses
Check that the rated normal current
of the fuses to be installed corre-
sponds with the value indicated on the
nameplate on the rear of the
fuseholder.
Fuses according to DIN Standards
a) Mounting the adapters (fig. 18a)
The fuseholder is designed to take fuses with
a length of 442 mm. For smaller sizes, two
adapters are required:
– Adapter (45) for fuses with a length of 192
mm (A)
– Adapter (46) for fuses with a length of 292
mm (B).
Select the type of adapter in relation to the type
of fuse to be used, and insert it fully over the
fuse contact, opposite to the one of the striker.
Tighten the steel band (47) and fully tighten the
screw (48). To dismantle, proceed in reverse
order.
The same instructions are given in the Kit sheet
put in the adapter packing.
b) Dismantling the fuses (fig. 18b)
Open the locking rings (49) (fig. 18b) moving
them in the direction shown by the arrows us-
ing the tool (50), and remove the fuse using
the special tool (50).
c) Mounting the fuses (fig. 18c)
Open the locking rings (49) moving them in the
direction shown by the arrows using the tool
(50 fig. 18b), fully insert the fuses with the con-
tacts fitted with striker on the opposite side to
the isolating contacts of the contactor. Close
the locking rings again, moving them in the
opposite direction to the opening one.
Fig. 18a
!
Fuses according to BS Standards
Check that the rated normal current
of the fuses to be installed corre-
sponds with the value indicated on
the nameplate on the rear of the
fuseholder.
When tightening the screws, do not
force the connections (25 Nm maxi-
mum tightening torque).
Fuse mounting and dismantling
must only be done with the adapter
(if required) already mounted on it.
Only use the material specified, pro-
vided by ABB, for assembly.