Internal Fuse - CD Automation REVEX 1PH 280A User Manual

REVEX
1PH 280A
18

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
280A (S10)
1.2
1.0
K
0.8
0.7
0.6
0.4
0.2
200
(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 powered, the thyristor unit is subject to dangerous voltages; disconnect
from the power supply before opening the fuse box and touching electrical equipments.
Fuse CODE
FU2055920.200
500
400 600 800
Vac
200 kA Symmetrical A.I.C.
RMS
Total Current
Vac
(A )
RMS
400 690
*
2
I T are multiplied for K value in function of Vac, at
500V K is equal to 0,7 (ex:100000 X 0,7 = 70000).
At 690Vac K is equal to 1.
62
User's manual
Quantity
2
FUSE I T value
for each
Suggested A2s
phase
(at660V)*
100000 2