Operating Instructions ACU
7.1 EMC information
The frequency inverters are designed according to the requirements and limit values of product norm
EN 61800-3 with an interference immunity factor (EMI) for operation in industrial applications.
Electromagnetic interference is to be avoided by expert installation and observation of the specific
product information.
Measures
ï‚· Install the frequency inverters and commutating chokes on a metal mounting panel. Ideally, the
mounting panel should be galvanized, not painted.
ï‚· Provide proper equipotential bonding within the system or plant. Plant components such as
electrical cabinets, control panels, machine frames must be connected by means of PE cables, i.e.
sufficient area and with good conductivity.
ï‚· The shield of the control cables is to be connected to ground potential properly, i.e. with good
conductivity, on both sides (shield clamp). Mount shield clamps for cable shields close to the unit.
ï‚· Connect the frequency inverter, the commutating choke, external filters and other components to
an earthing point via short cables.
ï‚· Excessive cable length and loosely suspended cabling must be avoided.
ï‚· Contactors, relays and solenoids in the electrical cabinet are to be provided with suitable
interference suppression components.
1 fuse
2 circuit breaker
3 line choke (optional)
4 input filter (optional)
5 cable shield
6 braking resistor (optional)
7 output filter (optional)
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