ABB ACS800 Series - Page 115

Technical data
115
The following parameters may effect on the correct operation of the protection:
• cable length, i.e. the longer the cable the weaker the fuse protection, as the long
cable limits the fault current
• cable size, i.e. the smaller the cable the weaker the fuse protection, as the small
cable size limits the fault current
• transformer size, i.e the smaller the transformer the weaker the fuse protection,
as the small transformer limits the fault current
• transformer impedance, i.e. the higher the z
k
the weaker the fuse protection as
high impedance limits the fault current.
The protection can be improved by installing a larger supply transformer and/or
bigger cables, and in most cases by selecting aR fuses instead of gG fuses.
Selection of smaller fuses improves the protection, but may also affect the fuse life
time and lead to unnecessary operation of the fuses.
In case of any uncertainty regarding the drive protection, please contact your local
ABB.
Three-phase supply voltage 525 V, 550 V, 575 V, 600 V, 660 V or 690 V
-0050-7 3×16 Cu 3×25 Al 65 67 70 63 63 63
-0060-7 3×16 Cu 3×25 Al 70 70 70 70 70 70
-0070-7 3×25 Cu 3×50 Al 95 95 99 95 95 95
-0100-7 3×35 Cu 3×50 Al 130 140 150 110 110 110
-0120-7 3×50 Cu 3×70 Al 180 180 190 140 140 140
-0145-7 3×70 Cu 3×95 Al 220 220 240 160 160 160
-0175-7 3×95 Cu 3×120 Al 260 260 280 200 200 200
-0205-7 3×95 Cu 3×150 Al 340 360 390 230 230 230
Note 1: The supply transformer minimum power in kVA is calculated with a z
k
value of 6% and frequency 50 Hz.
Note 2: This table is not intended for transformer selection - that must be done separately.
ACS800-01 size Cable type Supply transformer minimum apparent power S
N
(kVA)
Copper Aluminium Max. cable length with gG fuses Max. cable length with aR fuses
10 m 50 m 100 m 10 m 100 m 200 m