Cable Length Restrictions - Control Techniques Unidrive Regen Installation Manual

Table 6-1 3-phase Regen inductor
Rated current
Drive size
A rms
UNI 1405 9.5
UNI 2401 12
UNI 2402 16
UNI 2403 25
UNI 3401 34
UNI 3402 40
UNI 3403 46
UNI 3404 60
UNI 3405 70
UNI 4401 96
UNI 4402 124
UNI 4403 156
UNI 4404 180
UNI 4405 220
UNI 5401 300
Table 6-2 3-phase switching frequency filter inductor
Rated current
Drive size
A rms
UNI 1405 9.5
UNI 2401 12
UNI 2402 16
UNI 2403 25
UNI 3401 34
UNI 3402 40
UNI 3403 46
UNI 3404 60
UNI 3405 70
UNI 4401 96
UNI 4402 124
UNI 4403 156
UNI 4404 180
UNI 4405 220
UNI 5401 300
UNI 5402 600
UNI 5403 900
UNI 5404 1200
6.4

Cable length restrictions

There are 3 significant cable lengths which must be taken into account when designing a Regen system. Refer to Figure 6-1 on page 18.
6.4.1 AC supply connection
A is the AC cable length between the Regen inductor and the Regen drives terminals.
In general, no special precautions are necessary for the AC supply wiring in respect to the Regen drive. However the voltage in the wiring between
the Regen inductor and the Regen drive terminals is a source of radio frequency emission. To minimise emissions, these cables should be kept as
short as possible. Ideally, the inductors should be mounted close to the drive terminals.
If it is necessary to use a cable longer than 5m, a screened cable should be used with the screen grounded as shown in Figure 6-1 on page 18.
6.4.2 DC bus connection
B is the DC bus connection between the Regen and motoring drive, the + DC bus connections between the drives should be treated as a single two
core cable and not two individual cable / bus bar lengths.
The DC power output from the Unidrive which is used as the input stage to the motoring drive(s) carries a common-mode high frequency voltage
comparable with the output voltage from a standard drive. All precautions recommended for motor cables must also be applied to all cables
connected to this DC circuit.
Unidrive Regen Installation Guide
Issue Number: 2
Inductance
No per Regen
Drive
mH
6.3 1
5.0 1
3.75 1
2.4 1
1.76 1
1.5 1
1.3 1
1.0 1
0.78 1
0.63 1
0.48 1
0.38 1
0.33 1
0.30 1
0.24 1
Inductance
No per Regen
Drive
mH
3.160 1
2.500 1
1.875 1
1.200 1
0.880 1
0.750 1
0.650 1
0.500 1
0.390 1
0.315 1
0.240 1
0.190 1
0.165 1
0.135 1
0.100 1
0.050 1
0.034 1
0.025 1
www.controltechniques.com
Total
CT
losses
part number
W
4401-0001 125
4401-0002 146
4401-0003 175
4401-0004 210
4401-0005 285
4401-0006 310
4401-0007 320
4401-0008 345
4401-0009 415
4401-0010 515
4401-0011 585
4401-0012 645
4401-0013 775
4401-0014 845
4401-0015 1760
Total
CT
losses
part number
W
4401-0162 28
4401-0163 35
4401-0164 37
4401-0165 40
4401-0166 52
4401-0167 60
4401-0168 60
4401-0169 80
4401-0170 90
4401-0171 100
4401-0172 110
4401-0173 130
4401-0174 170
4401-0175 180
4401-0176 220
4401-0177 400
4401-0178 530
4401-0179 700
17