Replacing Cylindrical Fuses; Replacing The Lv Hrc Fuses - Siemens SINAMICS S120 Manual

Cabinet modules
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6.4.11.5

Replacing cylindrical fuses

Preparatory steps
● Observe the "five safety rules".
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
Replacement steps
1. Open the cabinet.
2. Open the fuse holder (push the flap down/up).
3. Remove the defective fuse.
4. Insert the replacement fuse.
5. Close the fuse holder (push the flap up/down).
6. Close the cabinet.
6.4.11.6

Replacing the LV HRC fuses

Description
NH fuses (low-voltage high-breaking-capacity fuses), also called knife fuses, are used, for
example, in the on/off switches of the power supplies.
Figure 6-28
Cabinet Modules
Manual, 03/2013, A5E03263538A
NH fuse
Maintenance and servicing
6.4 Replacing components
335

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