MAINTENANCE
31
7.5.4 Fuses of BS Standards replacement
• Mounting the adapters
The fuse holder is preset to take fuses with
fixing center distance of 454 mm. For smaller
sizes, adapters are needed, as indicated below:
- Adapter for fuses with fixing center distance l
= 305 mm
Select the type of adapter, fix it onto the fuse
on the striker side by means of the grub screws,
the cup springs and the short nuts. Mount the
adapter with the extension, with the cap facing
the striker, torque is 25 Nm (Fig 7q)
• Mounting the fuses
Remove the plastic housing of the fuse.
Mount the fuses or the adapter (preassembled
as indicated in par. a) with the striker, (indicated
by the arrow) facing the opposite side to the one
of the contactor tulips and fix them by means of
the screws and the spring washers.
Put back the plastic housing.
7.5.5 Mounting and dismantling the short-circuit
busbar
Mount the busbar with the feeler pin on the
opposite side to that of the tulips and fix it with
the screws, torque is 25 Nm, as Fig 7t and 7u.
—
Fig 7q
—
Fig 7t
—
Fig 7r
—
Fig 7s
• Dismantling the fuses
To dismantle the fuses and relative adapters,
proceed in reverse order to the previous chapter
of “mounting the fuses”.
To Next Page
Loading...
