Cable Types - ABB ACS800-U7 Hardware Manual

• 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 cross-section 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
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.

Cable types

The table below gives copper and aluminium cable types for different load currents.
Cable sizing is based on max. 9 cables laid on a cable ladder side by side, three
ladder type trays one on top of the other, ambient temperature 30 °C (86 °F), PVC
insulation, surface temperature 70 °C (158 °F) (EN 60204-1 and
IEC 60364-5-52:2001). For other conditions, size the cables according to local
safety regulations, appropriate input voltage and the load current of the drive.
Copper cables with concentric
copper shield
Max. load
current
A
56 3×16
71 3×25
88 3×35
107 3×50
137 3×70
167 3×95
193 3×120
223 3×150
255 3×185
301 3×240
274 2 × (3×70)
334 2 × (3×95)
386 2 × (3×120)
446 2 × (3×150)
510 2 × (3x185)
602 2 × (3×240)
579 3 × (3×120)
669 3 × (3×150)
765 3 × (3×185)
903 3 × (3×240)
Aluminium cables with concentric
copper shield
Cable type Max. load
current
2
mm A
69
83
107
130
151
174
199
235
214
260
302
348
398
470
522
597
705
the weaker the fuse protection as high impedance
k
Cable type
2
mm
3×35
3×50
3×70
3×95
3×120
3×150
3×185
3×240
2 × (3×70)
2 × (3×95)
2 × (3×120)
2 × (3×150)
2 × (3×185)
2 × (3×240)
3 × (3×150)
3 × (3×185)
3 × (3×240)
3BFA 01051905 C
121
Technical data