Rolls-Royce Helicon X3, User Manual

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Maintenance Instructions
7
Page 9 of 22 Doc. No.: 13S000411
Revision: A Copyright © 2010 Rolls-Royce plc
4.6 Fuses
There are two general types of fuses, automatic and glass cartridge fuses.
• Automatic fuses will switch to off position when tripped. Pull the switch back to on
position to re-power the circuit.
• A glass cartridge fuse is blown if the cord inside the glass has been broken. Notice the
technical data written on the old fuse and replace it with a new with matching data.
Please refer to chapter 12 Design Drawings and the part list for details. Never replace a
fuse with higher ampere or lower voltage characteristics than it should be.
4.7 Replacing the Power Supplies
If the AC/DC power supply in the main control cabinet is replaced, the output voltage
must be adjusted to +26 VDC. This is to ensure that the power supply is adjusted to
deliver a higher voltage than the DC/DC supply.
If the DC/DC power supply is replaced, adjust the output voltage to +25 VDC.
DC OK
Adjust
Output DC 24V 10A
Input
AC 100-240V
L N
32.5-28.5V
1
DC OK
Adjust
Output DC 24V 10A
Input
AC 100-240V
L N
32.5-28.5V
1