28
CS2 R30252.xx
from 75A to 200A
User’s manual
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
200 kARMS Symmetrical A.I.C.
Qty
Fuse CODE
Current
(ARMS)
Vac
FUSE I2T value
Suggested A2s
(at660V)*
75A (S09)
FU120FEE
120
660
3100
2
125A (S09)
FU200FEE
200
660
11400
2
150A (S09)
FUURE250
250
660
52000
2
200A (S10)
FUURE315
315
660
82000
2
12
* I
2
T are multiplied for K value in function of Vac at 500V
K is equal to 0,7 (600V) (ex: 3100 X 0,7 = 2170).
At 660Vac K is equal to 1.
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.
