4-47
4-2 Function Mode
4
Functions
*
To switch to the 2nd/3rd control, allocate 08 (SET)/17 (SET3) to the desired multi-function input and then turn it on.
*1.
Set a percentage relative to the electronic thermal multiplication value. When the value reaches 100%, an
overload trip (E05) occurs.
Electronic Thermal Level (Motor Protection Level)
(Example) 3G3RX-A2150 (0.4 to 55 kW)
Rated current: 64 A
Setting range: 12.8 A (20%) to 64.0 A (100%)
• The graph on the right shows the time limit
characteristics with the electronic thermal level
(b012) set to 64 A.
(Example) 3G3RX-A4750 (75 to 132 kW)
Rated current: 149 A
Setting range: 29.8 A (20%) to 149 A (100%)
• The graph on the right shows the time limit
characteristics with the electronic thermal level
(b012) set to 149 A.
Electronic Thermal Characteristics
•The frequency characteristics are integrated with the above b012/b212/b312 set values.
•A general-purpose motor requires reduced load (current) because the lower the output frequency
is, the lower the cooling capability of its self-cooling fan.
•The reduced torque characteristics are designed to fit the heat radiation of a general-purpose
motor.
b015
Free setting, electronic thermal
frequency 1
0. to 400. 0. Hzb017
Free setting, electronic thermal
frequency 2
b019
Free setting, electronic thermal
frequency 3
b016
Free setting, electronic thermal
current 1
0.0 to Rated current 0.0 Ab018
Free setting, electronic thermal
current 2
b020
Free setting, electronic thermal
current 3
C061 Thermal warning level 0. to 100.
*1
80 %
Related functions C021 to C025, C026
Parameter No. Function name Data Default setting Unit
Trip time (s)
60
3.0
0
69.8
(109%)
96
(150%)
128
(200%)
Motor current (A)
(Ratio to the rated
current of the Inverter)
Trip time (s)
60
0.5
0
158
(106%)
223.5
(150%)
298
(200%)
Motor current (A)
(Ratio to the rated
current of the Inverter)
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