Conducted Rf Emission; Requirements For Conducted Emission - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
6.5.12

Conducted RF emission

Radio frequency emission in the frequency range from 150kHz to
30MHz is mainly conducted out of the equipment through electrical
wiring. It is essential for compliance with all emission standards, except
for IEC61800-3 second environment, 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 screen. For example, the screen
formed by the armouring of steel wired armoured 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 screened.
When an EMC filter is used the switching frequency filter
discussed above must also be used. Failure to observe this
may result in the EMC filter becoming ineffective and being
damaged.
CAUTION
When used with the recommended filters, the Regen drive system
complies with the requirements for conducted emission in the following
standards:
Table 6-7 Requirements for conducted emission
Motor cable length (m)
0 to 100
Key to
Standard
table
EN50081-2
I
EN61800-3
IEC1800-3
The first environment is one where the low voltage supply network also supplies domestic premises
1
Restricted distribution means that drives are available only to installers with EMC competence
2
For installation in the "second environment", i.e. where the low voltage
supply network does not supply domestic premises, no filter is required
in order to meet IEC61800-3 (EN61800-3):1996.
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
CAUTION
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.
Unidrive SP Regen Installation Guide
Issue Number: 2
System Mechanical
design installation
Switching frequency (kHz)
3
I
Description
Generic emission standard
for the industrial
environment
Product standard for
Requirements for the first environment
adjustable speed power
Requirements for the second environment: unrestricted distribution
drive systems
www.controltechniques.com
Electrical Getting
Optimisation
installation started
Frequency
Limits
range
79dBµV quasi peak
0.15 to 0.5MHz
66dBµV average
73dBµV quasi peak
0.5 to 30MHz
60dBµV average
Technical Component
Parameters
data sizing
Application
AC supply lines
1 2
: restricted distribution
Diagnostics
81