Notes Concerning The Fuse Tables - ABB ACS800-U7 Hardware Manual

Supply cable:
• length = 170 m
• resistance/length = 0.112 ohm/km
• reactance/length = 0.0273 ohm/km.
U
Z = z ·
k k
S
m · 0.112
R = 170
c
m · 0.0273
X = 170
c
I
=
k2-ph
The calculated short-circuit current 9.7 kA is higher than the minimum short-circuit current of the drive
gG fuse type OFAF3H500 (8280 A). -> The 500 V gG fuse (ABB Control OFAF3H500) can be used.

Notes concerning the fuse tables

Note 1: See also section
fuses, see section NEMA data
Note 2: In multicable installations, install only one fuse per phase (not one fuse per conductor).
Note 3: Larger fuses than the recommended ones must not be used.
Note 4: Fuses from other manufacturers can be used if they meet the ratings and the melting curve of
the fuse does not exceed the melting curve of the fuse mentioned in the table.
2 2
(430 V)
N
·
= 0.072 = 4.438 mohm
3000 kVA
N
ohm
= 19.04 mohm
km
ohm
= 4.641 mohm
km
410 V
2
(19.04 mohm) + (4.438 mohm + 4.641 mohm)
2 ·
Thermal overload and short-circuit protection
on page 123.
= 9.7 kA
2
on page 46. For UL recognized
Technical data
117