Specification
T1689 Technical Manual Rev 07
DELTA Rectifier Module
MV3000 Air Cooled DELTA
Page 42
Fusing
To protect a DELTA rectifier module from d.c. link side short circuits it is recommended that semi-conductor
fuses be fitted in the a.c. supply. The current rating of the rectifier module with the recommended fuses is
given in Table 2–20. Other manufacturers’ fuses may be used but they should be equivalent to the types
specified in this manual. Table 2–21 includes details of the input power circuits and the fusing arrangements.
Module
Voltage (V)
Fuse
DC Current Rating (A)
For 1.5
Overload
For 1.1
Overload
GDR391-4401
380 – 480
GSGB350 (3 qty)
P
GSGB400 (3 qty)
GSGB450 (3 qty)
362
391
391
362
391
493
GDR391-4601
500 – 690
A100P400 (3 qty)
P
A100P500 (3 qty)
391
391
391
493
GDR721-4401
380 – 480
GSGB580 (3 qty)
P
A366S800D1 (3 qty)
A366S900D1 (3 qty)
633
721
721
633
800
876
GDR721-4601
500 – 690
A100P700 (3 qty)
P
A100P1000 (3 qty)
721
721
721
876
GDR872-4401
380 – 480
A366S900D1 * (3 qty)
P
A366S1000 (3 qty)
872
872
872
1080
GDR872-4601
500 – 690
A100P800 * (3 qty)
P
A100P1000 (3 qty)
872
872
872
1080
GDR633-4401
380 – 480
GSGB350 (6 qty)
P
GSGB400 (6 qty)
GSGB450 (6 qty)
586
633
633
600
633
800
GDR633-4601
500 – 690
A100P400 (6 qty)
P
A100P500 (6 qty)
633
633
633
800
GDR1168-4401
380 – 480
A366S800D1 (6 qty)
P
A366S900D1 (6 qty)
1168
1168
1168
1420
GDR1168-4601
500 – 690
A100P700 (6 qty)
P
A100P1000 (6 qty)
1168
1168
1168
1420
Table 2–20. – Recommended Fuses For Rectifier Module Input Protection
NOTES: Semi-conductor fuses of the correct rating must be fitted to each of the three phases of the a.c. supply input
to protect against catastrophic failure of the input rectifiers.
Devices marked ‘P’ will also protect the input rectifier devices against damage from overcurrent. However, it
may result in a lower effective rectifier rating. The GDR872 (marked ‘*’) requires an additional 31 µH input
reactor (or equivalent supply fault level) and the appropriately rated fuse for fuse protection.
The fuses should be fitted remotely from the rectifier;
All ratings are calculated assuming a 31 MVA supply (fault level), no added impedance.
The ratings given at Table 2-3 are for the recommended semiconductor fuses from two suppliers. The GSGB
are from the GE Power Controls HRC fuse link range rated up to 660 V +10% (727 V) and the A366S from the
Gould Shawmut Semiconductor fuse range rated up to 660 V +10% (727 V).
The codes for fuses may not specify the mechanical details. These should be selected to suit user
requirements.
All incoming mains cables should be protected with fuses according to local wiring regulations, for example,
in Europe (or any other countries that use IEC standards) using fuses type gG and in USA and Canada using
Class L fuses.
