Basic Countermeasure For Restrain Interference - toscano TDS600 Serie Manual De Usuario

4.1.1. Basic countermeasure for restrain interference

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Earth grounding cable of peripheral device and inverter wiring make up of the
closed-loop and leakage current of inverter earth grounding cable will make
device perform wrong action. It will decrease wrong action when device not
connect to earth grounding.
When the power of peripheral device and inverter power belong to the same
power source, high harmonic gererating from inverter will transmit the voltage
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and current along with the power line which will interfere other devices
within the same power source system. Take some restraining measures as
below: install electromagnetic noise filter at inverter input end; use isolation
transformer to isolate other devices; connect power end of peripheral device to
remote power grid; add power ferrite filter magnetic ring to inverter
phase wire to restrain high harmonic current conduction
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To prevent wire parallel or bundled of strong and weak current, it should keep
away from inverter assemble device, and wiring should away from inverter
R,S,T,U,V,W equipower line. Devices with highfield and high magnetic field
should notice the corresponding installation position of inverter and keep
distance and orthogonal crossing.
Countermeasure of weakening effect
Keep other sensitive devices and signal wire installed away from
inverterr. it should use shield wire and make the shield layer single
end earth grounding. Besides keep distance from inverter and its input
& output wire as possible as. When signal wire need to intersect with
strong current cable, it should make them orthogonal crossing not
parallel.
Install high frequency noise filter (ferrite common code choke, also
called magnetic ring) at the bottom end of the inverter input & output to
restrain radio frequency interference of dynamic wire effectively.
Motor cable should be placed in protective object with large thickness,
such as placed in larger thickness(over 2mm) pipeline or buried in
cemented tank. Putting dynamic wire in metal tube and connect to earth
grounding with shield wire (motor cable use 4-core cable, one side is
earthed through the inverter, the other side connected to motor casing).
4. EMC (Electromagnetic Compatibility)Explanation
R,S,T three
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