Lenze SCF frequency inverter - Manual (Page 18)

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Lenze 13466146 EDBSF01 v24 EN
3 Installation
3.2.4 Installation According to EMC Requirements
The SCF Series can be installed to meet the European standards for Electromagnetic Compatibility
(EMC) requirements. These requirements govern the permissible electromagnetic emissions and
immunity, both radiated and conducted, of a drive system.
The EMC requirements apply to the final installation in its entirety, not to the individual components
used. Because every installation is different, the recommended installation should follow these
guidelines as a minimum. Additional equipment (such as ferrite core absorbers on power conductors)
or alternative wiring practices may be required to meet conformance in some installations.
Filter: The input to the drive (or group of drives) must include a filter to reduce the electrical noise
reflected back to the AC Line. The SCM can be installed to meet the industrial standards set by the
EU, EN 61800-3 for conducted emissions and EN 55011 for radiated emissions to class A compliance
when installed with an appropriately installed external line filter.
EMC
Compliance with EN 61800-3/A11
Installation: Shielded cable must be used for all control and power cables and
exposed wiring must be kept as short as possible.
A Screen clamps
B Control cable
C Low-capacitance motor cable
(core/core < 75 pF/m, core/screen < 150 pF/m)
D Electrically conductive mounting plate
E Filter
3.3 Power Wiring
DANGER!
Hazard of electrical shock! Capacitors retain charge after power is removed.
Disconnect incoming power and wait until the voltage between terminals B+ and
B- is 0 VDC before servicing the drive.
Note drive input and output current ratings and check applicable electrical codes for required wire
type and size, grounding requirements, over-current protection, and incoming power disconnect,
before wiring the drive. Size conservatively to minimize voltage drop.
Refer to Section 3.4 - SCF Power Wiring Diagram for information on torque and wire stripping
requirements for power wiring.
Input fusing and a power disconnect switch or contactor MUST be wired in series with terminals L1,
L2, and L3 for three phase input models. For 208/240 Vac single phase input models, use terminals
L1 and L2. This disconnect must be used to power down the drive when servicing, or when the drive
is not to be operated for a long period of time, but should not be used to start and stop the motor.
Repetitive cycling of a disconnect or input contactor (more than once every two minutes) may cause
damage to the drive.