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Thyristor Questions

How to substitute the Fuse?

The thyristor unit have internal fuse extrarapid at low I²t for the thyristor protection of against the
short-circuits.
The Fuses must have I²t 20% less than thyristor’s I²t. The warranty of thyristor is null if no proper fuses
are used.
200 kARMS Symmetrical A.I.C.
Size Fuse CODE Current
(A RMS)
I²T
(A²sec) Vac
Qty
280A (S9) 2×20 559 02.200 2×200 80000 660 1
400A (S12) FU550FMM 550 193500 660 1
500A (S12) FU700FMM 700 378000 660 1
600A (S12) 2xFU450FMM 2×450 378000 660 1
700A (S12) 2xFU450FMM 2×450 378000 660 1
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: When it is supply, the Thyristor unit is subject to dangerous voltage, don’t open
the Fuse-holder module and don’t touch the electric equipments.


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Controller Questions

How Switch on

Connect power supply

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