TM 5-3895-374-24-1
Recommendations for use
of the motor/speed controller combination
Line inductances
The use of line inductances is strongly recommended in the following circumstances
-mains subject to interference from other loads (interference, overvoltage),
-speed controller supplied by a line with very low impedance (proximity of power
transformers with more than 10 times the speed controller power), especially rf the speed
controller power is > 55 kW,
- installation of a large number of frequency inverters on the same line
The use of these inductances provides the following advantages
- increased protection against input rectifier bridge overvoltages,
- reduction of the current absorbed by the speed controller at full load the inductances
recommended enable limitation of the line current to a value equal to that of the motor
current,
- reduction of the load on the power factor correction capacrtors, where fitted in the
installation
Inductances between
The addition of inductances between the speed controller and the motor is recommended
the speed controller
in the following circumstances
and the motor
- speed controller and motor connected by cables > 100 meters long,
- motor control in parallel, if the number is > 3,
- motors with more than 6 poles, with a low power factor and stator inductance,
- motor with a higher power value than the speed controll er power,
- ATV-452D55S, D75N, D90N to ensure protection against short-circuits between output
phases, if the speed controller-motor connection cables are < 25 meters long
The use of these inductances enables reduction of
- the values of the current peaks taken by the motor,
- earth leakage interference currents,
- radio interference created by the motor connection cables,
- vibrations and motor noise
Recommended
The inductances recommended can be used on line and / or between the speed controlle r and the
motor
three phase
inductances
Characteristics
For speed controllers
Reference
5 mH
5 A
ATV-452075 (M) (N)
VZ1 -L005UM50T
ATV-452U15 (N)
ATV-452U22 (N)
1,7mH
15A
ATV-452U22M
VZ1-L015UM17TT
ATV-452U30
ATV-452U40 (M) (N) (S)
ATV-452U55 (N)
0,8 mH
30 A
ATV-452U55M
VZ1-L030U800T
ATV-452U75 (M) (N) (S)
ATV-452D11 (N)
ATV-452D15 (N) (S)
0,6 mH
40A
ATV-452D11M
VZ1-L040U600T
ATV.452D1 8N
ATV-452D22N
0,35 mH
70 A
ATV-452D15M
VZ1 -L070U350T
ATV-452D22
ATV-452D30 (N) (S)
ATV-452D37 (N)
0,17 mH
150 A
ATV-452D55 (N) (S)
VZ1-L150U170T
ATV-452D75 (N)
0,1 mH
250A
ATV-452D90 (N)
VZ1-L250U100T
(page 3-187)
