Document And Software Version; Regulatory Compliance; Ce Mark; Low Voltage Directive - Danfoss VLT AutomationDrive FC 301 Design Manual

Introduction
1 1
Trip
A state entered in fault situations, e.g. if the frequency
converter is subject to an overtemperature or when the
frequency converter is protecting the motor, process or
mechanism. Restart is prevented until the cause of the
fault has disappeared and the trip state is cancelled by
activating reset or, in some cases, by being programmed
to reset automatically. Trip may not be used for personal
safety.
Trip Locked
A state entered in fault situations when the frequency
converter is protecting itself and requiring physical
intervention, e.g. if the frequency converter is subject to a
short circuit on the output. A locked trip can only be
cancelled by cutting off mains, removing the cause of the
fault, and reconnecting the frequency converter. Restart is
prevented until the trip state is cancelled by activating
reset or, in some cases, by being programmed to reset
automatically. Trip may not be used for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
Power Factor
The True Power Factor (lambda) takes all the harmonics
into consideration and is always smaller than the Power
Factor (cosphi) that only considers the 1st harmonics of
current and voltage.
P kW
cosϕ = =
P kVA
Cosphi is also known as displacement power factor.
Both lambda and cosphi are stated for Danfoss VLT
frequency converters in chapter 6.2.1 Mains Supply.
The power factor indicates to which extent the frequency
converter imposes a load on the mains supply.
The lower the power factor, the higher the I
same kW performance.
In addition, a high power factor indicates that the different
harmonic currents are low.
All Danfoss frequency converters have built-in DC coils in
the DC link to have a high power factor and to reduce the
THD on the main supply.

1.5 Document and Software Version

This manual is regularly reviewed and updated. All
suggestions for improvement are welcome. Table 1.2 shows
the document version and the corresponding software
version.
Edition
MG33BFxx
Table 1.2 Document and Software Version
10
VLT
Uλ x Iλ x cosϕ
Uλ x Iλ
Remarks Software version
Replaces MG33BExx
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW

1.6 Regulatory Compliance

Frequency converters are designed in compliance with the
directives described in this section.

1.6.1 CE Mark

The CE mark (Communauté européenne) indicates that the
product manufacturer conforms to all applicable EU
directives. The 3 EU directives applicable to the design and
manufacture of frequency converters are the directive low-
voltage, the EMC directive, and (for units with an
integrated safety function) the machinery directive.
The CE mark is intended to eliminate technical barriers to
free trade between the EC and EFTA states inside the ECU.
The CE mark does not regulate the quality of the product.
Technical specifications cannot be deduced from the CE
mark.

1.6.1.1 Low Voltage Directive

Frequency converters are classified as electronic
components and must be CE labelled in accordance with
the low-voltage directive. The directive applies to all
electrical equipment in the 50–1000 V AC and the 75–1600
V DC voltage ranges.
The directive mandates that the equipment design must
ensure the safety and health of people and livestock are
not endangered and the preservation of material worth so
®
long as the equipment is properly installed, maintained,
and used as intended. Danfoss CE-labels comply with the
low-voltage directive and provide a declaration of
conformity upon request.
for the
RMS

1.6.1.2 EMC Directive

Electromagnetic compatibility (EMC) means that electro-
magnetic interference between apparatus does not hinder
their performance. The basic protection requirement of the
EMC Directive 2004/108/EC states that devices that
generate electromagnetic interference (EMI), or whose
operation could be affected by EMI, must be designed to
limit the generation of electromagnetic interference and
shall have a suitable degree of immunity to EMI when
properly installed, maintained, and used as intended.
A frequency converter can be used as stand-alone device
or as part of a more complex installation. Devices used as
stand alone or as part of a system must bear the CE mark.
6.72
Systems must not be CE marked but must comply with the
basic protection requirements of the EMC directive.
MG33BF02 - Rev. 2013-12-20