Honeywell
CD3000S-3PH from 125A to 500A
User’s Manual
8. Fuses and fuseholder
8.1 Fuses and Fuse Code
CD3000S unit must be protected by fuses against short circuit selecting the proper I²t that must
be lower than thyristor one. The same caution must be taken if Circuit Breaker is used. Remember
that is very difficult to protect the thyristor if this choice is done.
WARNING!! Equipment short circuit protected by Semiconductor Fuse type
with proper I
2
t
Bussmann Div - Cooper (UK) Ltd
(200 kA
RMS
Symmetrical A.I.C.)
Ferraz Shawmut SA
(200 kA
RMS
Symmetrical A.I.C.)
Sizes
Fuse Mod. No.
/modéle fusible
Current
(A
RMS
)
I
2
t
(A
2
sec)
V ac
Fuse Mod. No.
/modéle fusible
Current
(A
RMS
)
I
2
t
(A
2
sec)
Vac
125A
2x 100 FE
100
2800
660
2 x 6,9 URY
17/100
100 3900
690
150A
2x 100 FE
100
2800
660
2 x 6,9 URY
17/100
100 3900
690
300A 450
FMM 450 105000
660
6,6 URZ 2X000
BS88 Z 450
450 126000 660
350A 550
FMM 550 215000
660
6,6 URZ 2X000
BS88 Z 550
550 208000 660
400A 550
FMM 550 215000
660
6,6 URZ 2X000
BS88 Z 550
550 208000 660
450A 700
FMM 700 420000
660
6,6 URZ 2x000
BS88 Z 700
700 340000 660
500A 700
FMM 700 420000
660
6,6 URZ 2x000
BS88 Z 700
700 340000 660
FERRAZ (200kA @ 660V)
SIBA (300kA @ 600V, 200kA @700V)
225A
6,6 URB 000
BS88/315
315
82000
660
20 559 20
315
77000 660
High speed fuses are only used for the thyristor protection and can not be used to
protect the installation.
The user installation must be protect by electromagnetic circuit breaker or by fuse
isolator.
The warranty of thyristor is null if no proper fuses are used. See tab above.
www.honeywell.com/imc 22