Danfoss VZH052 Manual page 20

EMC installation
EMC best practices
EMC correct installation
of an frequency drive
CDS303
EMC remediation
Compressor
Power size
VZH052CJ 11kW
VZH052CG 11kW
VZH065CG 11kW
VZH065CG 15kW
VZH065CG 15kW
20
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• Use screened (shielded) cables for motor, control
wiring and communication.
• Separate cables for input power, motor wiring
and control wiring. Failure to isolate power,
motor, control and communication cables
can result in unintended behavior or reduced
performance. Minimum 200 mm (7.9 in)
clearance between power, motor and control
cables is required.
EMC qualification reports are available upon request to Danfoss technical support.
PLC etc.
PLC
Min. 0.025 in ²
(16 mm²)
Equalizing cable
Control cables
Mains supply
L1
L2
L3
PE
Reinforced protective ground
For some models, ferrite cores need to be added
to the input and/or output of CDS303 drive, as a
CDS303 drive
Voltage RFI filter
T2 H2
T4 H2
T4 H2
T4 H2
T4 H3
• Ensure VFD proper grounding
• Motor cables should be as short as possible to
reduce noise level and leakage currents.
• Use the decoupling plate to fix and terminate
cables (Refer to
frequency drive CDS303)
• Add ferrite cores on power lines and earth line if
necessary to pass EMC class A.
Panel
Decoupling plate
Min. 7.9 in
(200 mm)
between control
cables, motor cable
and mains cable
remediation, to fulfil the Class A Group 1 emission
and immunity requirements.
Remediation (ferrite cores)
Drive input
Material: manganese zinc ferrite core
-
Y
Y
Y
-
EMC correct installation of an
Grounding rail
Cable insulation
stripped
All cable entries in
one side of panel
Motor cable
Motor, 3 phases and
protective ground
Drive output
Material: nickel zinc ferrite core
Y
Y
Y
Y
-