Internal Fuse; Fuse Code - CD Automation MULTIDRIVE-1PH User Manual

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13 Internal Fuse

The MULTIDRIVE 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

13.1 Fuse Code

Size
850A
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.
MULTIDRIVE-1PH 850A
200 kARMS Symmetrical A.I.C.
Fuse CODE
FU2x550FMM
Current I²T
(A RMS) (A²sec)
900 420000
58
User's Manual
T
Vac
660
Qty
2