NAL/NALF – Mounting and operation manual
11
3–6 mm
15 14 13
7
5 6 7
12
11
1
11
9
8
1 2 3 4
MEC.
10
max. e÷8 mm
e (DIN 43625)
3–6 mm
15 14 13
7
5 6 7
12
11
1
11
9
8
1 2 3 4
MEC.
10
max. e÷8 mm
e (DIN 43625)
3–6 mm
15 14 13
7
5
6 7
12
11
1
11
9
8
1 2 3 4
MEC.
10
max. e÷8 mm
e (DIN 43625)
Fig. 28 Fuse tripping | Fig. 29 Tripping rod | Fig. 30 Fuse tripping comlpeted | Fig. 31 A-mechanism
– after fuse interruption the mechanism shall be blocked against
another operation until the fuse link has been replaced.
6.4 Fuse tripping. Control
1. Turn the operating shaft E, see Fig. 26 clockwise, max 60°, and
return the operating handle back to the neutral position (ope-
ning spring housing F, see Fig. 31, must not be latched),
2. Mount a new fuse-link, or a test fuse which is in accordance
with DIN 43625, in one of the phases. Dimensionally the fuse
link then will have the same dimensions as ABB-CEF fuse-links,
3. If the distance between the fuse clips is longer than described
– max e + 8 mm, the ajustment (point 6.3) must be made with
the fuse link resting on the fuse clips on the fuse base,
4. The distance between the striker pin and the fuse trip flag
(15) must be from 3-6 mm. By this adjustment the fuse link is
allowed to sag, but the distance between the striker pin and the
fuse trip flag must not exceed 12 mm,
5. If the fuse switch disconnector does not open when adjusted
as mentioned above, the adjustment has to be checked and
repeated.
Remark:
– the hooks (12) on the release rod (1) ought to have the same
position as shown on Fig. 29 - when the fuse switch disconnector
is in open position with both operating springs uncharged, but
with the releasing spring charged (ref. point 1).
Fig. 28
Fig. 30
Fig. 29
Fig. 31
