Mitigating Radiated Emissions - Parker AC30P Hardware Installation Manual

MITIGATING RADIATED EMISSIONS

Equipment Placement
Do not place magnetic/electric field sensitive equipment within 0.25 meters of the following parts of the VSD system:
•
Variable Speed Drive (VSD)
•
EMC output filters
•
Input or output chokes/transformers
•
The cable between VSD and motor (even when screened/armored)
•
Connections to external braking chopper and resistor (even when screened/armored)
•
AC/DC brushed motors (due to commutation)
•
DC link connections (even when screened/armored)
•
Relays and contactors (even when suppressed)
Emissions from individual components tend to be additive. To reduce the emissions:
•
The equipment must be mounted in a metal cubicle. Refer to EMC Compliance Table on page A-7.
•
The cubicle should be as free of openings as is practical. Vent systems suitable for EMC applications are available from cubicle
vendors and should be used.
Radiated magnetic and electric fields inside the cubicle will be high and any components fitted inside must be sufficiently immune.
•
All cable entry and exits (power, control, and communication) should use screened cable
•
Earth screen at both ends connecting to the motor frame and cubicle.
•
Use of screened/armored cable between VSD/cubicle and motor containing the motor protective earth (PE) connection is most
important. If shielded cable is not available, lay unshielded motor cables in a metal conduit which will act as a shield. The conduit
must be continuous with a direct electrical contact to the VSD and motor housing. If links are necessary, use braid with a
minimum cross sectional area of 10mm
•
Use 360° screen terminations.
AC30 series Variable Speed Inverter
2
.
A-11
Compliance