Siemens SINAMICS S150 NEMA, Operating Instructions Manual, Page: 789 / 862

Maintenance and servicing
11.4 Replacing components
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
787
Note
If required, the LV HRC fuse grip can be ordered from Siemens using article number 3NX1.
Removal steps
The following steps are used to remove the LV HRC fuse:
1.
Open the main switch.
2. Remove the front shock hazard protection cover of the cabinet in front of the fuses.
WARNING
Electric shock as the cover above the line supply connections has been removed
When the lower cover (over the line connections) is removed, line voltage is present
even when the main switch is switched off. Contact with the connections can result in
death or serious injury.
•
Do not remove the cover (shock protection) over the line connections.
3. Locate the LV HRC fuse puller with forearm protection for LV HRC fuse-links over the
fuse.
4. Withdraw the defective fuse.
NOTICE
Device failure after a LV HRC fuse trips
When a low-voltage high-rupturing-capacity fuse trips, the neighboring low-voltage high-
rupturing-capacity fuses may also become damaged. Failure to replace all fuses at the
same time can cause the device to fail.
•
After a low-voltage high-rupturing-capacity fuse trips, always replace all low-voltage
high-rupturing-capacity fuses at the same time. Always use fuses of the same type.
Installation steps
The following steps are used to install the LV HRC fuse:
1.
Insert the new fuse into the LV HRC fuse puller.
2. Insert the fuse into the fuse holder.
3. Press the release button on the LV HRC fuse puller to release the grip from the new fuse.
4. Attach the front shock hazard protection cover.
The mains switch can then be switched on.