ABB ACS850 Hardware Manual

Technical data
113
Calculation example
Drive:
• ACS850-04-430A-5
• supply voltage U = 410 V
Transformer:
• rated power S
N
= 3000 kVA
• rated voltage U
N
= 430 V
• transformer impedance z
k
= 7.2%.
Supply cable:
• length = 170 m
• resistance/length = 0.112 ohm/km
• reactance/length = 0.0273 ohm/km.
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.
·
(430 V)
2
3000 kVA
= 4.438 mohm
Z
k
= z
k
·
U
N
2
S
N
= 0.072
m
·
0.112
ohm
km
= 19.04 mohm
R
c
= 170
m
·
0.0273
ohm
km
= 4.641 mohm
X
c
= 170
=
410 V
2 ·
(19.04 mohm)
2
+ (4.438 mohm + 4.641 mohm)
2
I
k2-ph
= 9.7 kA
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ABB ACS850 Specifications

General

Safety	STO (Safe Torque Off)
Communication	CANopen
Enclosure	IP21
Output Voltage	Up to 1000 V DC
Protection Features	Overcurrent, Overvoltage, Undervoltage
Cooling Method	Air or liquid cooling
Input Voltage	380 to 690 V AC