Safety
information
Introduction
Product
Information
System
design
Mechanical
Installation
Electrical
Installation
Getting
started
Optimization Parameters
Technical
data
Component
sizing
Diagnostics
UL
Information
132 Unidrive M Regen Design Guide
Issue Number: 4
6.5.11 Conducted and radiated RF emission
Radio frequency emission in the frequency range from 150 kHz to
30 MHz is mainly conducted out of the equipment through electrical
wiring. It is essential for compliance with all emission standards that the
recommended EMC filter and a shielded (screened) motor cable are
used. Most types of cable can be used provided it has an overall shield.
For example, the shield formed by the armoring of steel wired armored
cable is acceptable. The capacitance of the cable forms a load on the
drive and should be kept to a minimum. The same considerations apply
to any cables connecting the DC bus between drives, except that short
direct wiring within the same enclosure need not be shielded.
In addition to motor cable length, conducted emission also varies with
drive switching frequency. Selecting the lowest switching frequency will
produce the lowest level of emission but will increase ripple in the Regen
filter and switching frequency filter. In order to meet the emission
standards the drive, filter and motor cable must be installed correctly.
Refer to the guidelines given in section 6.5.2 General requirements for
EMC on page 130.
Single regenerative drive
When used in a simple integrated regenerative drive arrangement, i.e. a
pair of drive modules back-to-back with all of the associated auxiliary
components such as Regen chokes and filters located on the same
panel, the radio frequency emission behaviour of a regenerative system
is similar to that of a single conventional drive. The recommended
arrangements given in the individual drive EMC data sheets should be
followed. If used, the input RFI filter must be connected upstream of the
switching-frequency filter as shown in the power connection diagrams
(Figure 4-4 to Figure 4-8 on page 52). The switching-frequency filter is
essential in this case to protect the RFI filter from switching-frequency
current which would otherwise over-stress its capacitors.
N
Theoretically the use of two drives physically close together can cause
an increase in emission level of 3 dB compared with a single drive,
although this is usually not observed in practice. All drives have
sufficient margin in respect of the generic standard for the industrial
environment EN 61000-6-4:2007+A1:2011 to allow for this increase.
Multi-drive and other more complex systems
Refer to the Unidrive M Regen configuration EMC data sheet.
For currents exceeding 300 A up to 2500 A suitable filters are available
from the following manufacturers:
Epcos B84143-B250-5xx (range up to 2500 A)
Schaffner FN3359-300-99 (range up to 2400 A)
These filters may not give strict conformity with EN 61000-6-
4:2007+A1:2011, but in conjunction with the relevant EMC installation
guidelines they will reduce emission to sufficiently low levels to minimise
the risk of disturbance.
Recommended EMC filters
These are the same filters as recommended for standard
(non-regenerative) operation:
Table 6-18 Recommended filters
When an EMC filter is used, the switching frequency filter
must also be used. Failure to observe this may result in the
EMC filter becoming ineffective and being damaged.
Operation without a filter is a practical cost-effective
possibility in an industrial installation where existing levels
of electrical noise are likely to be high, and any electronic
equipment in operation has been designed for such an
environment. There is some risk of disturbance to other
equipment, and in this case the user and supplier of the
drive system must jointly take responsibility for correcting
any problem which occurs.
Drive
Motor
cable
length m
Part number
03200066 to 03200106
100
4200-3230
04200137 to 04200185 4200-0272
05200250 4200-0312
06200330 to 06200440 4200-2300
07200610 to 07200830 4200-1132
08201160 to 08201320 4200-1972
09201760 to 09202190 (9A) 4200-3021
10202830 to 10203000 4200-4460
03400078 to 03400100 4200-3480
04400150 to 04400172 4200-0252
05400270 to 05400300 4200-0402
06400350 to 06400470 4200-4800
07400660 to 07401000 4200-1132
08401340 to 08401570 4200-1972
09402000 to 09402240 (9A) 4200-3021
10402700 to 10403200 4200-4460
11403770 to 11404640 4200-0400
06500150 to 06500350 4200-3690
07500440 to 07500550 4200-0672
08500630 to 08500860 4200-1662
09501040 to 09501310 (9A) 4200-1660
10501520 to 10501900 4200-2210
11502000 to 11502850 4200-0690
07600190 to 07600540 4200-0672
08600630 to 08600860 4200-1662
09601040 to 09601310 (9A) 4200-1660
10601500 to 10601780 4200-2210
11602100 to 11602630 4200-0690
To Next Page
Loading...
