IMO VXSM150-1, Инструкция по эксплуатации

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5-14 Selecting Functions
5
Electronic thermal overload relay 1
(Level)
Electronic thermal overload relay 1
(Thermal time constant)
The electronic thermal overload relay watches the
output frequency, output current and operation
time of the inverter to prevent the motor from
overheat. The protective function becomes
active when 150% of the set amperage flows for
the time set at F12 (thermal time constant).
•
Selection between active and inactive
operation of the electronic thermal overload
relay and selection of the target motor are
made. When the general purpose motor is
selected, the operation level is low at low
revolution speeds according to the cooling
characteristics of the motor.
Setting: 0 Inactive
1 Active (for general purpose motor)
2 Active (for forced-ventilated motor)
•
The operation level of the electronic thermal
overload relay is set in amperage. Enter the
value 1.0 to 1.1 times rated current of the
motor.
The setting range is 20 to 135% of the rated
inverter current.
F11
F10
F12
F11
Setting range Description of selection
0 Automatic torque boost characteristics
where the torque boost value of the
constant torque load is automatically
adjusted (refer to function code P04
"Motor 1 ("(Tuning)").
1 Square reduction torque
characteristics for fan and pump loads
2 Proportional torque characteristics for
intermediate load between the square
reduction torque and torque
characteristics.
3 to 31 Constant torque characteristics
Torque boost 1
•
This function is for motor 1. The following
options can be selected.
- Selection of load characteristics such as
automatic torque boost, square reduction
torque load, proportional torque load and
constant torque load.
-
Correction of magnetic flux shortage of
motor in accordance with the voltage drop in
low frequency zone, and torque boost during
low speed operation (boosting of V/f
characteristics).
F09
•
Torque characteristics
<Square reduction torque characteristics>
<Proportional torque characteristics>
<Constant torque characteristics>
Note) When the torque boost value is
excessively large, the motor is excessively
excited in the low speed zone at all types of
characteristics. If operation continues in such a
state, the motor may be overheated. Set a value
according to the characteristics of the driven
motor.
Electronic thermal overload relay 1
(Select)
F02
Set the time since 150% of the operation level
current flows continuously until the electronic
t h e r m a l
overload relay
functions.
Setting range:
0.5 to 10.0 min.
(minimum unit
0.1 minute)
F12
When F10 = 1
When F10 = 2
100
90
69
Fe x 0.33 Fe
Graph of relationship between operation
level current and output frequency
Output Frequency Fo (Hz)
Operation Level Current [%]
Fe =
Fb (Fb = <50Hz)
50Hz (Fb > 50Hz)
nb: Fb = Base Frequency