Chapter: H.2. Technical data
Special
functions
PID controller
Build-in 4 PIC controllers. Choice of referencing-unit signal source
and feedback signal source, possibility of inverting polarity of an
control error signal , SLEEP function and output erasing on STOP
signal, limitation of an output value.
PLC controller
Possibility of taking control over converter's operation, START /
STOP system, direction of rotation and frequency, possibility of
controlling any external process without connection of external
PLC controller.
100 universal functional blocks, 43 functions: simple logic and
arithmetic blocks; block of 8-state sequencer, 2 multiplexers with 8
inputs, curve shaping unit, maximum execution time of the PLC
program: 10ms.
Additional functions
of the panel
Definition of User's values for direct observation of the process
variables- choice of measurement unit, scale and data source (e.g.
from PLC controller).
Definition of User's referencing-device for direct changing of the
process variables – choice of measurement unit and scale
Copying parameter settings between frequency converters
Protections
Short-circuit
Short-circuit on unit output
Overcurrent
Instantaneous value 3.2 I
n;
; effective value 2.25 I
n
Overvoltage AC/DC
MFC1000 400 V: 1,43 U
in
AC, 750 Vdc
MFC1000 690 V: 1,28 U
in
AC, 1200 Vdc
Undervoltage
0.65 U
in
Thermal: device
Heatsink's heat sensor
Thermal: motor
I
2
t limit, motor heat sensor
Supervision of
communication with
control panel
Established permissible time of connection absence
Supervision of
communication
through RS
Established permissible time of connection absence
Control of analog
inputs
Check of absence of “living null” in modes 2 ... 10V and 4 ... 20mA
Control of a load
symmetry
E.g. break in one of the motor phases
Underload
Protection from operating without any load
Stall
Protection against stall of a motor
Table H.2.2 – Technical data of frequency converters of the
MFC1000AcR 400V
series, depending on a type
Type of frequency converter
P
n
[kW]
I
n
[A]
I
p
[A]
MFC1000AcR/75kW
75
150
225
MFC1000AcR/90kW
90
180
270
MFC1000AcR/110kW
110
210
215
Table H.2.3 – Technical data of frequency converters of the
MFC1000AcR 690V
series, depending on a type
Type of frequency converter
P
n
[kW]
I
n
[A]
I
p
[A]
MFC1000AcR/75kW 690V
75
87
130
MFC1000AcR/90kW 690V
90
104
156
MFC1000AcR/110kW 690V
110
121
182
P
n
– nominal output power
I
n
– nominal output current
I
p
– overload current: for 60 seconds every 10 minutes
MFC1000AcR, TWERD Power Electronics
9
