ABB ACS880-01 - Calculation Example; Fuses (UL)

Calculation example
Drive:
• ACS880-01-145A-3
• Supply voltage = 410 V
Transformer:
•
rated power S
n
= 600 kVA
•
rated voltage (drive supply voltage) U
N
= 430 V
•
transformer impedance z
k
= 7.2%.
Supply cable:
• length = 170 m
• resistance/length = 0.398 ohm/km
• reactance/length = 0.082 ohm/km.
·
(430 V)
2
600 kVA
= 22.19 mohm
Z
k
= z
k
·
U
N
2
S
N
= 0.072
m
·
0.398
ohm
km
= 67.66 mohm
R
c
= 170
m
·
0.082
ohm
km
= 13.94 mohm
X
c
= 170
=
410 V
2 ·
(67.66 mohm)
2
+ (22.19 mohm + 13.94 mohm)
2
I
k2-ph
= 2.7 kA
The calculated short-circuit current 2.7 kA is higher than the minimum short-circuit
current of the drive gG fuse type OFAF00H160 (1700 A). -> The 500 V gG fuse (ABB
Control OFAF00H160) can be used.
Fuses (UL)
Fuses for branch circuit protection per NEC are listed below. ABB recommends fast
acting class T or faster fuses in the USA. Obey local regulations.
UL (one fuse per phase)Input currentACS880-01-…
UL classBussmann
type
VAA
U
n
= 230 V
TJJS-15600154.404A6-2
TJJS-15600156.306A6-2
210 Technical data