Siemens NXAIR Operating Instructions Manual page 139

Arrangement of HV HRC fuse-links
Depending on the panel version, contactors are equipped with either single or double fuse-link arrangement
per phase. Hereafter, replacing HV HRC fuse-links is shown using the example of a double fuse-link
arrangement.
When inserting a new HV HRC fuse-link, its striker must always point to the operating side of the contactor
truck (1). The position of the striker is identified with a triangle (2) representing an arrow on the rating plate of
the HV HRC fuse-link.
1
Fig. 244: Arrangement of HV HRC fuse-links (example with double fuse-link arrangement)
(3) Outer phase L1 with double
fuse-link arrangement
(4) Outer phase L3 with double
fuse-link arrangement
(5) Middle phase L2 with double
fuse-link arrangement
(6) Front side of the contactor
truck
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Operating the contactor panel with panel width 435 mm
NOTICE
Undetected damage
Even if the contactor truck shows no visible damages of a fault, the HV HRC fuse-
link may have tripped due to a fault.
Check the switching-device compartment for deformations when a
fuse-link has tripped.
3
Fig. 245: Seen from top: Arrangement of HV HRC fuse-links
(example with double fuse-link arrangement)
NXAIR / ≤ 40 kA
2
6
4
5
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