Emc Filters; Internal Filter; External Filter - Control Techniques Unidrive sp Kurzhandbuch

Safety Product Mechanical
Information Information Installation
3.3

EMC filters

Internal filter

It is recommended that the internal EMC filter be kept in place unless there is a specific
reason for removing it.
If the drive is part of a regen system or is a Unidrive SP size 3 to 6 on an IT supply then
the internal EMC filter must be removed.
The internal EMC filter reduces radio-frequency emission into the mains supply. Where
the motor cable is short, it permits the requirements of EN61800-3 to be met for the
second environment - for further information see the Unidrive SP User Guide on the CD
Rom supplied with the drive. For longer motor cables the filter continues to provide a
useful reduction in emission level, and when used with any length of shielded motor
cable up to the limit for the drive, it is unlikely that nearby industrial equipment will be
disturbed. It is recommended that the filter be used in all applications unless the ground
leakage current (on 400V, 50Hz supply) of 28mA for sizes 0 to 3 and 56mA for sizes 4 to
6 is unacceptable or the above conditions are true.
Refer to section 10.10 on page 299 for the location of the internal EMC filter.

External filter

Refer to section 10.8 on page 294. For further information refer to the Unidrive SP User
Guide on the CD Rom supplied with the drive.
12
Electrical Getting
Menu 0
Installation Started
www.controltechniques.com
Running Advanced
Diagnostics Appendix
the motor parameters
Unidrive SP Short Form Guide
UL Listing
Information
Issue Number: 2