Relation Of Long-Distance Wiring And Current Leak And The Countermeasure; Installation Demand For Electromagnetic On-Off Electronic Device - SHENZHEN ENCOM ELECTRIC TECHNOLOGIES CO. enc eds800-2s0002n User Manual

above (related to size of powerful current). Should cross each other vertically if
intersection, as Fig.3-16.
(6) Powerful grounding wire must be connected to earth separately from weak
grounding cable such as control signal and sensor cable etc.
(7) Forbid to connect other electricity consumption device to inverter power supply input end(L1,
L2, L3).

3.7.3 Relation of long-distance wiring and current leak and the countermeasure

High-order harmonic will form between-line leak current through distributing capacitor and
to-earth leak current when long-distance wiring between inverter and motor commence. Can
adopt following method to suppress:
(1) install ferrite magnetic circle or output reactor at inverter output side.
End voltage of the motor will be reduced markedly when installing reactor of 5% above rated voltage dropn
!
and make long-distance wiring to U, V, W. Fully loaded motor have the danger of burning itself，should
work in lower volume or step up its input output voltage.
(2) Reduce carrier wave frequency but motor noise would increase accordingly.

3.7.4 Installation demand for electromagnetic on-off electronic device

Relay，magnetic control conductor and electromagnetic iron and so on, these electromagnetic
on-off electronic device would bring lots of noise during work, so you should pay full attention to
when installing them beside the inverter or in the same control chamber with the inverter and
must install surge absorbing device as shown in Fig. 3-17.
Inverter or
other electric
apparatus
Fig.3-17 installation demand for electromagnetic on-off device
EDS800 series Service Manual
diode
Voltage-sensible resistor
RC-filter
23
+
220V
_
DC
～
220V
AC
～
～
220V
AC
～