PMA-Relay S 3PH
from 60A to 210A
Internal Fuse
25
12.
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.
Type
Fuse Code
Spare Part
Current
(ARMS)
Vac
FUSE I2T value
Suggested A2s
(at500V)*
FUSE I2T value
Suggested A2s
(at660V)
060
2 x 50 073 06.100
2 x 100
660
8680
12400
060 (only UL)
L220971J
100
660
3998
6150 (690V)
075 (only UL)
L220971J
100
660
3998
6150 (690V)
090
2 x 50 073 06.100
2 x 100
660
8680
12400
120
20 559 20.180
180
660
14280
20400
150
20 559 20.200
200
660
17500
25000
180
20 559 20.250
250
660
30800
44000
210
20 559 20.315
315
660
53900
77000
*I2T are multiplied for K value in function of Vac at 500V K is
equal to 0,7 (ex:12400 X 0,7 = 8680).
At 660Vac K is equal to 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.
