Chapter 12 Description of Parameter Settings|CFP2000 Series
12.1-06-7
“EoL1/EoL2” and the motor will be in free running.
This parameter is to set the action time of electronic thermal relay. It works based on the I2t
characteristic curve of electronic thermal relay, output frequency and current of motor drive, and
operation time to prevent motor from over-heat.
40
20
60
80
100
2 5 50 10 0 150
Motor rated
frequency %
75
125
otor rated
current %
Motor rated
frequency %
Motor cooling curve with independent fan
125
75
The action of electronic thermal relay depends on the setting of Pr.06-13/Pr.06-27.
1. 06-13 or 06-27 is set 0 (using special motor)：
When output current of motor drive is higher than 150% of motor current (refer to motor
cooling curve with independent fan), motor drive will start to count the time. When the
accumulated time exceeds Pr.06-14 or 06-28, electronic thermal relay will act.
2. 06-13 or 06-27 is set 0 (using standard motor)：
When output current of motor drive is higher than 150% of motor current (refer to motor
cooling curve with shaft-fixed fan), motor drive will start to count the time. When the
accumulated time exceeds Pr.06-14 or 06-28, electronic thermal relay will act.
The real electronic thermal relay action time will adjust with drive output current (shown as
motor loading rate). When the current is high, the action time is short; when the current is high,
the action time is short. Please refer to following chart:
50
200
100
150
0
250
300
F=50Hz
F=40Hz
F=20Hz
450
350
400
500
550
600
12
24
36
48
60
72
84
96
108
120
132
144
156
168
180
192
Opera
e
(sec.)
Motor loading rate
(%)
Heat Sink Over-heat (OH1) Warning
Factory Setting: 105.0
Settings
0.0~110.0℃
When using heavy duty or advanced control mode, the OH warning will be disabled if Pr.06-15
remains as default. When the temperature reaches 100℃, motor drive will stop with IGBT
over-heat fault.
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