Danfoss FC 300 Series User Manual

Slip Compensation
The adjustable frequency drive 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. (Par. group 13-**
Smart
Logic Control (SLC).
STW
Status Word
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 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 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.
VVC
plus
If compared with standard voltage/frequency ratio control,
Voltage Vector Control (VVC
plus
) improves the dynamics and
the stability, both when the speed reference is changed and
in relation to the load torque.
60° AVM
Switching pattern called 60°
Asynchronous Vector
Modulation (14-00 Switching Pattern).
Power Factor
The power factor is the relation between I
1
and I
RMS
.
Power factor =
3 x U x I
1
cos ϕ
3 x U x I
RMS
The power factor for 3-phase control:
=
I 1 x cos ϕ1
I
RMS
=
I
1
I
RMS
since cos ϕ1 = 1
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
RMS
for the same
kW performance.
I
RMS
= 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 adjustable frequency drive's built-in DC coils produce a
high power factor, which minimizes the imposed load on the
line power supply.
WARNING
The voltage of the adjustable frequency drive is dangerous
whenever connected to line power. Incorrect installation of
the motor, adjustable frequency drive or serial communi-
cation bus 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. The line power supply to the adjustable frequency
drive must be disconnected whenever repair work
is to be carried out. Make sure that the line power
supply has been disconnected and that the
necessary time has elapsed before removing motor
and line power supply plugs.
2. The [OFF] button on the control panel of the
adjustable frequency driver does not disconnect
the line power supply and consequently it must
not be used as a safety switch.
3. The equipment must be properly grounded, the
user must be protected against supply voltage and
the motor must be protected against overload in
accordance with applicable national and local
regulations.
4. The ground leakage current exceeds 3.5 mA.
5. Protection against motor overload is not included
in the factory setting. If this function is desired, set
1-90 Motor Thermal Protection to data value ETR trip
1 [4] or data value ETR warning 1 [3].
Introduction FC 300 Programming Guide
1-4 MG.33.MA.22 - VLT
®
is a registered Danfoss trademark
1
1

Danfoss FC 300 Series Specifications

General

Brand	Danfoss
Model	FC 300 Series
Category	DC Drives
Language	English