40
69
A
B
46
45
48
47
Fig. 18d
Fig. 18e
Fig. 19a
7.8. Replacement of the contactor
fuses
Check that the rated normal current of the
fuses to be installed corresponds with the
value indicated on the nameplate on the rear
of the fuseholder.
Fuses according to DIN Standards
a) Mounting the adapters (fig. 19a)
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. 19b)
Open the locking rings (49) (fig. 19b) moving them in the
direction shown by the arrows using the tool (50), and remove
the fuse using the special tool (50).
c) Mounting the fuses (fig. 19c)
Open the locking rings (49) moving them in the direction
shown by the arrows using the tool (50) (fig. 19b), fully insert
the fuses with the contacts 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.
Fuses according to BS Standards.
• Check that the rated normal current of the
fuses to be installed corresponds with the
value indicated on the nameplate on the
rear of the fuseholder.
• When tightening the screws, do not
force the connections (25 Nm maximum
tightening torque).
• Fuse mounting and dismantling must only
be done with the adapter (if required)
already mounted on it.
• Only use the material specified, provided
by ABB, for assembly.
NEPSI.COM - Northeast Power Systems. Inc.
