93 • Commissioning and Operation Manual
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Interposing relays connect the commands and indications to/from the Control Module.
The selector switches (DOL/Soft start and Local/remote/Comm./Off) are mounted inside the low
voltage compartment to prevent accidental change in their position while the Line Contactor is closed.
Note
: it is forbidden to change the position of these selector switches while Line Contactor is closed.
The Firing Transformer located on the right side of the low voltage section.
The control terminals in the low voltage compartment are NOT for customer use.
10.2.4
Fuses
The soft starter includes four fuses:
Three
fuses are located in the medium voltage Power Section, one per phase. They are located at the
smaller PCBs PC2075 (for 110VAC, 230VAC, 220VDC control voltage) or PC2076 (for 110VDC,
125VDC control voltage). These fuses are connected at the input side of the firing switched mode
power supplies and rated 10A.
To check these fuses:
o
In HRVS-DN rated up to 6.6kV it is required to disassemble the phases cover (open the plastic
screws as shown on
Figure 35
).
o
In HRVS-DN rated from 10kV and up the power supplies are located at the top compartment in
the medium voltage compartment as shown on
Figure 36
).
Note
:
For 110VAC, 230VAC, 220VDC control voltage a blown fuse will prevent firing supply for Its own
phase only.
For 110VDC, 125VDC control voltage, any blown fuse will prevent firing supply of all three phases.
Front View of the Power Section
Power Supply to Firing PCB
Figure 35 – Power Supply to Firing PCB (HRVS-DN Models up to 6600V).
