CD Automation srl CD3000E-3PH from 25A to 500A User’s Manual
58
15 Internal Fuse
The CD3000E thyristor unit have internal fuse extrarapid at low I²t for the thyristor protection of against
the short-circuits.
The fuse must have I²t lower than the thyristor one (I²t max)
Caution:
USE
ONLY
EXTRARAPID
FUSE
WITH
APPROPRIATE
I²
T
15.1 Fuse Code
200 kARMS Symmetrical A.I.C.
Size
Fuse CODE
Current
(A RMS)
I²T
(A²sec)
Vac
Qty
25A (S09) 2x50 073 06.100 2 x 100 10540 660 3
35A (S09) 2x50 073 06.100 2 x 100 10540 660 3
45A (S09) 2x50 073 06.100 2 x 100 10540 660 3
75A (S09) 2x50 073 06.100 2 x 100 10540 660 3
100A (S11) 20 282 20.180 180 16320 660 3
125A (S11) 20 282 20.180 180 16320 660 3
150A (S11) 20 282 20.250 250 35200 660 3
225A (S13) 20 559 20.315 315 61600 660 3
300A (S14) FU450FMM 450 84000 660 3
350A (S14) FU550FMM 550 193500 660 3
400A (S14) FU550FMM 550 193500 660 3
450A (S14) FU700FMM 700 378000 660 3
500A (S14) FU700FMM 700 378000 660 3
600A (S14) FU700FMM 700 378000 660 3
Caution:
The Fuses must have I²t 20% less than thyristor's I²t.
Caution:
High speed fuses are used only for the thyristor protection and can not be used to
protect the installation.
Caution:
The warranty of thyristor is null if no proper fuses are used. See tab.
Warning:
The user installation must be protected by electromagnetic circuit breaker or by
fuse isolator.
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