C-9
Certification
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
Reducing Radiated Emissions
To show compliance with the Adjustable Speed Electrical Power Drive Systems Standard BSEN61800-3,
and the Generic Standards BSEN61000-6-3 & BSEN61000-6-4; radiated emission measurements are made
between 30MHz and 1GHz in the far field at a distance of 10 to 30 metres. Limits lower than 30MHz or in
close proximity are not specified.
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 C-12.
Note
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
♦
Use of screened/armoured 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
2
.
♦
Use 360° screen terminations.