Shenzhen Hpmont Technology Co., Ltd Chapter 4 Electrical Installation
HD5L Series Controller User Manual ―41―
The wiring distance between the controller and the motor should be as short as possible shown in
Figure 4-37.
Figure 4-37 RF interference clearing
4.7.7 Input and Output Reactor
AC input reactor
The purpose of installing an AC input reactor is: to increase the input power factor; to dramatically
reduce the harmonics on the input side at the high voltage point of common coupling and prevent
input current unbalance which can be caused by the phase-to-phase unbalance of the power
supply. An AC line reactor which will help to protect the input rectifiers also reduces external line
voltage spikes (for example the lightning!).
DC reactor
The installation of a DC reactor can increase the input power factor, improve the controller’s
overall efficiency and thermal stability, substantially eliminate the upper harmonics influence on
the controller’s performance, and considerably decrease the conducted and radiated
electromagnetic emissions from the controller.
AC output reactor
Generally speaking, when the length of the cable between controller and motor is more than
100m, it will cause leakage current and controller tripping. It suggests that the user should
consider installing an AC output reactor.
HD5L
EMI filter
X
X
X
MCCB
M
Ironbox
Metal tube
～
EMI filter
4
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