is also the most expensive. In the transmission system composed of the inverter and the
motor, the inverter, braking unit, contactor, etc. can all be noise sources, and the noise
receivers can be automation devices, encoders, sensors, etc.
machinery / system is divided into different EMC areas according to the electrical characteristics
, and it is recommended to place the device in the areas divided as shown in Figure 4 -8 .
Description:
•
The zones should be spatially separated to allow electromagnetic decoupling .
•
minimum distance between each area is 20cm , and it is better to decouple with grounding
partitions . The cables in different areas should be placed in different cable ducts.
•
EMI filters should be installed at the interface between areas.
•
All communication cables and signal cables leading out of the cabinet must be shielded.
4
Janson Controls Technologies(Shenzhen) Co.,Limited
Chapter4 Electrical Installation
FC100P Series Manual V1.0
-19
Main
power supply
Power
control
cabinet
Control device
(Industrial computer,
PLC,etc.)
Sensors
(
such
as
temperature
,
llquid
level
,
etc
.)
Production
machinery
mechanical
system
Motor
EMI
f
il
ter
Inverter
EMI
filter
AC reactor
Area E
Grounding partion
Area C
Area D
Area F
Area A
Area B
Area A:control power transformer,control device,
sensor,etc.
Area B:The signal and control cable interface
part requires a certain degree of immunity.
Area C:Noise sources such as AC reactors.
frequency Inverters,braking units,
contactors,etc.
Area D:output EMI filter and its wiring part.
Area E:Power
Area F:Motors and its cables.
Figure 4-8 system-wiring area division diagram