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Cable resistance (ohm)
R
c
Z
k =
z
k ·
U
N
2/
S
N = transformer impedance (ohm)
Z
k
Transformer impedance (%)
z
k
Transformer rated voltage (V)
U
N
Nominal apparent power of the transformer (kVA)
S
N
Cable reactance (ohm)
X
c
Calculation example
Drive:
• ACS880-11-…
• supply voltage = 410 V
Transformer:
• rated power
S
n
= 600 kVA
• rated secondary voltage (supply for drive supply)
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 OFAF000H100 (1000 A). -> The 500 V gG fuse (ABB
Control OFAF000H100) can be used.
Technical data 175
Summary of Contents for ACS880-11
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 11 drives Hardware manual ...
Page 2: ......
Page 4: ......
Page 26: ...26 ...
Page 52: ...52 ...
Page 82: ...82 ...
Page 95: ...R6 R8 IP21 R6 R8 IP55 Electrical installation IEC 95 ...
Page 103: ...R6 1 5 N m 0 5 N m Electrical installation IEC 103 ...
Page 104: ...R8 1 5 N m 0 5 0 6 N m 104 Electrical installation IEC ...
Page 116: ...R6 R8 UL Type 1 R6 R8 UL Type 12 116 Electrical installation North America NEC ...
Page 142: ...142 ...
Page 154: ... Fan arrow must point up 154 Maintenance ...
Page 160: ...160 ...
Page 181: ... Package dimensions R6 R3 R8 Technical data 181 ...
Page 202: ...R3 IP21 UL Type 1 3AXD50000045323 202 Dimension drawings ...
Page 203: ...R3 Option B056 IP55 UL Type 12 3AXD50000045322 Dimension drawings 203 ...
Page 204: ...R6 IP21 UL Type 1 3AXD50000045353 204 Dimension drawings ...
Page 205: ...R6 Option B056 IP55 UL Type 12 3AXD50000045352 Dimension drawings 205 ...
Page 206: ...R8 IP21 UL Type 1 3AXD50000047667 206 Dimension drawings ...
Page 207: ...R8 Option B056 IP55 UL Type 12 3AXD50000047667 Dimension drawings 207 ...
Page 208: ...208 ...
Page 225: ... Declarations of conformity The Safe torque off function 225 ...