CD Automation REVO C, User Manual

Page: 77 / 78

REVO C
1PH from 300A to 800A
User’s manual
77
Internal Fuse
The thyristor unit have internal fuse extrarapid at low I
2
T for the thyristor protection of against the short-circuits.
The Fuses must have I
2
T 20% less than thyristor’s I
2
T. The warranty of thyristor is null if no proper fuses are used.
Size
200 kA
RMS
Symmetrical A.I.C.
Quantity for
each phase
Fuse CODE
Total
Current
(A
RMS
)
FUSE I
2
T value
Suggested A2s
(at 500V)*
FUSE I
2
T value
Suggested A2s
(at 660V)
Vac
300A (S12) FUFM350 350 73500 105000 660 1
400A (S12) FUFMM550.2 550 150500 215000 660 1
500A (S12) FUFMM700 700 294000 420000 660 1
600A (S12) FU2055920.250 1000 246400 352000 660 4
700A (S12) FU2055920.250 1000 246400 352000 660 4
800A (S15) FU2055920.250 1000 246400 352000 660 4
*I
2
T are multiplied for K value in function of Vac at
500V K is equal to 0,7 (ex:105000 X 0,7 = 73500).
At 660Vac K is equal to 1.
Fuses replacement: Open the cover and remove the
screws, then replace it with the correct fuse, use the
screws with a proper suggested torque indicated
below
Type Screw Torque
Lb-in (N-m)
300-800A M8 133.7 (15.0)
21
1.2
1.0
0.8
0.6
0.4
0.2
200 400 600 800
0.7
500
Vac
K
(Line voltage)
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.