Safety Precautions - Danfoss VLT AutomationDrive FC 360 Design Manual

Introduction
1 1
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.
IRMS = I 1 2 + I 5 2 + I 7 2 + .. + I n 2
In addition, a high power factor indicates that the different
harmonic currents are low.
The built-in DC coils produce a high power factor
minimising the imposed load on the mains supply.
Pulse input/incremental encoder
An external, digital pulse transmitter used for feeding back
information on motor speed. The encoder is used in
applications where great accuracy in speed control is
required.
RCD
Residual current device.
Set-up
Save parameter settings in 2 set-ups. Change between the
2 parameter set-ups and edit 1 set-up while another set-up
is active.
SFAVM
Acronym describing the switching pattern Stator Flux
oriented Asynchronous Vector Modulation.
Slip compensation
The frequency converter compensates for the motor slip
by giving the frequency a supplement that follows the
measured motor load keeping the motor speed almost
constant.
Smart Logic Control (SLC)
The SLC is a sequence of user-defined actions executed
when the associated user-defined events are evaluated as
true by the smart logic controller (parameter group 13-**
Smart Logic Control).
STW
Status word.
THD
Total harmonic distortion states the total contribution of
harmonic distortion.
Thermistor
A temperature-dependent resistor placed where the
temperature is to be monitored (frequency converter or
motor).
Trip
A state entered in fault situations, e.g. if the frequency
converter is subject to an overtemperature or when it 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. Do not
use trip for personal safety.
8
Design Guide
Trip locked
A state entered in fault situations when the frequency
for the converter is protecting itself and requiring physical
RMS
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. Do not use trip locked for personal safety.
VT characteristics
Variable torque characteristics used for pumps and fans.
VVC
If compared with standard voltage/frequency ratio control,
Voltage Vector Control (VVC
stability, both when the speed reference is changed and in
relation to the load torque.
60° AVM
Refers to the switching pattern 60
Modulation.

1.3 Safety Precautions

The voltage of the frequency converter is dangerous
whenever connected to mains. Incorrect installation of
the motor, frequency converter or fieldbus may cause
death, serious personal injury or damage to the
equipment. Consequently, the instructions in this
manual, as well as national and local rules and safety
regulations, must be complied with.
Safety Regulations
1.
2.
3.
4.
5.
Danfoss A/S © 09/2014 All rights reserved.
+
+ ) improves the dynamics and
WARNING
Always disconnect mains supply to the frequency
converter before carrying out repair work. Check
that the mains supply has been disconnected and
observe the discharge time stated in Table 1.2
before removing motor and mains supply.
[Off/Reset] on the LCP does not disconnect the
mains supply and must not be used as a safety
switch.
Ground the equipment properly, protect the user
against supply voltage, and protect the motor
against overload in accordance with applicable
national and local regulations.
Protection against motor overload is not included
in the factory setting. If this function is desired,
set 1-90 Motor Thermal Protection to [4] ETR trip 1
or [3] ETR warning 1.
The frequency converter has more voltage
sources than L1, L2 and L3, when load sharing
(linking of DC intermediate circuit). Check that all
voltage sources have been disconnected and that
° Asynchronous Vector
MG06B402