Danfoss VLT Brook Crompton Motor FCM 300, Руководство по конструкции

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4.1.16 Power Factor
The power factor is the relation between I
1
and I
RMS
.
The power factor for 3-phase control
The power factor indicates the extent to which the FC
motor imposes a load on the mains supply.
The lower the power factor, the higher the I
RMS
for the
same kW performance.
In addition, a high power factor indicates that the different
harmonic currents are low.
4.1.17 What is CE Labelling?
The purpose of CE labellings to avoid technical obstacles
to trade within EFTA and the EU. The EU has introduced
the CE label as a simple way of showing whether a
product complies with the relevant EU directives. The CE
label says nothing about the specifications or quality of
the product. Frequency converters are regulated by three
EU directives:
4.1.18 The Machinery Directive (98/37/EEC)
All machines with critical moving parts are covered by the
machinery directive, which came into force on 1 January
1995. Since a frequency converter is largely electrical, and
the motor always will be placed in connection with other
machines, it does not fall under the machinery directive.
However, if an FC motor is supplied for use in a machine,
we provide information on safety aspects relating to the
FC motor. We do this by means of a manufacturer's
declaration.
4.1.19 The Low-voltage Directive (73/23/
EEC)
Frequency converters must be CE labelled in accordance
with the low-voltage directive. The directive applies to all
electrical equipment and appliances used in the voltage
range of 50-1000 V AC and 75-1500 V DC.
4.1.20 The EMC Directive (89/336/EEC)
EMC is short for electromagnetic compatibility. The
presence of electromagnetic compatibility means that the
mutual interference between different components/
appliances is so small that the functioning of the
appliances is not affected. The EMC directive came into
force on 1 January 1996. The directive distinguishes
between components, appliances, Systems and instal-
lations.
4.1.21 What is Covered?
The EU "Guidelines on the Application of Council Directive
89/336/EEC" outline three typical situations of using an FC
motor. For each of these situations, explanations are
offered as to whether the situation in question is covered
by the EMC directive and must be CE labelled.
1. The FC motor is sold directly to the
endconsumer. The FC motor is for example sold
to a DIY market. The end-consumer is a layman.
He installs the FC motor himself for use with a
hobby machine, a kitchen appliance, etc. For such
applications, the FC motor must be CE labelled in
accordance with the EMC directive.
2. The FC motor is sold for installation in a plant.
The plant is built up by professionals of the trade.
It could be a production plant or a heating/
ventilation plant designed and installed by
professionals of the trade. Neither the FC motor
nor the finished plant has to be CE labelled under
the EMC directive. However, the unit must
comply with the basic EMC requirements of the
directive. The installer can ensure this by using
components, appliances and Systems that are CE
labelled under the EMC directive.
3. The FC motor is sold as part of a complete
System. The System is being marketed as
complete. It could be e.g. an air-conditioning
System. The complete System must be CE
labelled in accordance with the EMC directive.
The manufacturer who supplies the System can
ensure CE labelling under the EMC directive
either by using CE labelled components or by
testing the EMC of the SYSTEM. If he chooses to
use only CE labelled components, he does not
have to test the entire System.
All about FCM 300
VLT
®
DriveMotor FCM Series
82 MG03BA02 - VLT
®
is a registered Danfoss trademark
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