Commander SE User Guide
24
Issue Number 5
4.4.3 Input Line reactors
When the Drive is connected to an AC supply with a high fault current or which is
subject to severe disturbances, excessive peak current may flow in the input power
supply circuit of the Drive, which may cause nuisance tripping, or in extreme cases,
Drive failure.
An input AC line reactor should be installed in the following cases as it will add the
required impedance to reduce transient currents to a level which can be tolerated by
the input rectifier:
•
supply capacity exceeds 200kVA
•
fault current exceeds 5kA
•
power factor correction equipment is connected close to the Drive
•
large DC Drives with no or ineffective line reactors are connected to the supply
•
direct-on-line started motor(s) are connected to the same supply and, when any
of these motors are started, a dip is produced in excess of 20% of the actual
supply voltage
EMC filters do not provide the same protection as input reactors.
4.4.4 AC Line reactor values
Table 4.2 AC Line reactor values
Line reactors also improve the input current waveform and reduce the input current
harmonic levels. Further information is included in the EMC Data sheet which is
available from Control Techniques’ Drive Centres or Distributors.
4.5
Electromagnetic compatibility (EMC)
This section gives installation guidelines for ensuring electromagnetic compatibility.
Further detailed information is provided in the EMC Data sheets which are available
from Control Techniques’ Drive Centres or distributors.
The Drive meets the standards for electromagnetic immunity stated in section 3.2
without any special installation precautions. To prevent possible nuisance tripping, it
is recommended that all inductive circuits associated with the Drive, for example relay
coils, electromagnetic brakes etc. should be fitted with appropriate suppression.
The following precautions should be taken to prevent the Drive from causing
interference with other electronic equipment:
For general use, and where the requirements of the Power Drive Systems standard
EN61800-3 (IEC61800-3) for the second environment apply, the guidelines in section
4.5.1 Routine EMC precautions should be followed. These are sufficient to prevent
interference to general purpose industrial and similar equipment of good quality recent
NOTE
Drives used with
Reactor
part number
Input
phases
Inductance
Contin-
uous rms
current
Peak
current
Dimensions
(mm)
mH
A
A
L
D
H
SE11200025, SE11200037
4402-0224
1
2.25
6.5
13
72
65
90
SE11200055, SE11200075,
SE2D200075, SE2D200110
4402-0225
1
1.0
15.1
30.2
82
75
100
SE2D200150, SE2D200220
4402-0226
1
0.5
26.2
52.4
82
90
105
SE23400075, SE23400110,
SE23400150
4402-0227
3
2.0
7.9
15.8
150
90
150
SE2D200075, SE2D200110,
SE2D200150, SE23400220,
SE23400300, SE23400400,
SE33400550, SE33400750
4402-0228
3
1.0
15.4
47.4
150
90
150
SE23200400, SE2D200220,
SE33200550, SE33200750
4402-0229
3
0.4
24.6
49.2
150
90
150
SE43401100, SE43401500
4402-0232
3
0.6
27.4
54.8
180
100
190
