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

Introduction
FC Standard Bus
Includes RS-485 bus with FC protocol or MC protocol. See
8-30 Protocol.
Thermistor
A temperature-dependent resistor placed where the
temperature is to be monitored (adjustable frequency drive
or motor).
Trip
A state entered in fault situations, e.g., if the adjustable
frequency drive is subject to an overtemperature or when
the adjustable frequency drive is protecting the motor,
process or mechanism. Restart is prevented until the cause
of the fault has disappeared and the trip state is canceled
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 adjustable
frequency drive is protecting itself and requiring physical
intervention, e.g., if the adjustable frequency drive is
subject to a short circuit on the output. A locked trip can
only be canceled by cutting off line power, removing the
cause of the fault, and reconnecting the adjustable
frequency drive. Restart is prevented until the trip state is
canceled 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 (cos-phi) that only considers the 1st harmonics of
current and voltage.
P kW
Uλ x Iλ x cos ϕ
cos ϕ = =
P kVA Uλ x Iλ
Cos-phi is also known as displacement power factor.
Both lambda and cos-phi are stated for Danfoss VLT
adjustable frequency drives in chapter 6.2.1 Line Power
Supply.
The power factor indicates to which extent the adjustable
frequency drive imposes a load on the line power 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 adjustable frequency drives have built-in DC coils in the
DC link to have a high power factor and to reduce the
THD on the main supply.
MG33BF22
Design Guide

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

1.6 Regulatory Compliance

Adjustable frequency drives 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 three EU directives applicable to the design
and manufacture of adjustable frequency drives 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

Adjustable frequency drives 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
for the
RMS
low-voltage directive and provide a declaration of
conformity upon request.
Rev. 2014-04-04 All rights reserved.
Remarks Software version
Replaces MG33BExx
1 1
6.72
11