Internal Fuse - CD Automation Revo C 3PH User Manual

20 Internal 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.
Size
Fuse CODE
300A (S14) FU450FMM
350A (S14) FU550FMM
400A (S14) FU550FMM
450A (S14) FU700FMM
500A (S14) FU700FMM
600A (S17) 4 x 20 559 20.250
700A (S17) 4 x 20 559 20.250
800A (S17) 4 x 20 559 20.250
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.
Neut-Eng-REVO-C-3PH-300-800A-Thyristors-Units
REVO C
200 kARMS Symmetrical A.I.C.
FUSE I2T value
Current
Suggested A2s
(A RMS)
(at500V)*
450 73500
550 150500
550 150500
700 294000
700 294000
4x250 246400
4x250 246400
4x250 246400
* I T are multiplied for K value in function of Vac at
2
500V K is equal to 0,7 (ex:77000 X 0,7 = 53900).
At 660Vsc K is equal to 1.
Fuse replacement: pen the cover and remove the
screws, then replace it with the correct fuse, use the
screws with a proper suggested torque indicated below
TYPE
300-800A
55
FUSE I2T value
Suggested A2s
(at660V)
105000
215000
215000
420000
420000
352000
352000
352000
Screw Torque
Lb-in (N-m)
M8 133.7(15.0)
User's Manual
Qty
Vac
3
660
3
660
3
660
3
660
3
660
3
660
3
660
3
660