Siemens SINAMICS G150, Operating Instructions Manual

Page: 634 / 680

Maintenance and servicing
11.4 Replacing components
Converter cabinet units
634
Operating Instructions, 07/2016, A5E03347396A
Description
The DC fuses are installed in a fuse insert. To replace the fuses, the fuse insert must be
removed.
NOTICE
Device failure after a DC fuse ruptures
The neighboring DC fuses may also become damaged if a DC fuse ruptures. Failure to
replace all fuses at the same time can cause the device to fail.
•
After a DC fuse ruptures, always replace all DC fuses at the same time. Always use
fuses of the same type.
Preparatory steps
● Disconnect the drive line-up from the power supply
● Allow unimpeded access.
● Remove the protective cover.
Removal steps
The removal steps are numbered in accordance with the numbers in the diagram.
1.
Release the DC connections at DCP and DCN (4 screws each)
2. Remove nuts (8 screws)
3. Remove the retaining screws for the connection plate of the housing (4 screws) and
remove the connection plate.
4. Remove the retaining screw for the fuse insert (1 screw)
You can now remove the fuse insert.
NOTICE
Damage to the device if signal cables or plastic parts are damaged when removing
Signal cables or plastic parts can be damaged when the fuse insert is removed. This can
cause the device to fail.
•
When removing the fuse insert, ensure that you do not damage any signal cables or
plastic parts.
You can then replace the DC fuses.