Delta C2000 Series User Manual page 360

Electronic Thermal Characteristic for Motor 1
Electronic Thermal Characteristic for Motor 2
Settings 30.0~600.0 sec
The parameter is set by the 150% of motor rated current and the setting of Pr.06-14 and Pr.06-28 to
prevent the motor damaged from overheating. When it reaches the setting, it will display
"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.
Motor rated
current %
1 00
80
60
40
20
75
2 5 50
Motor c ooling curve with shaf t-fixed fan
The action of electronic thermal relay depends on the setting of Pr06-13/Pr06-27.
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 Pr06-14 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 Pr06-14 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:
Op eratio n time
(se c.)
6 00
5 50
5 00
4 50
4 00
3 50
30 0
2 50
2 00
1 50
1 00
50
0
Chapter 12 Description of Parameter Settings C2000 Series
Motor rated
10 0 125 1 50
frequenc y %
12-06-7
Motor rated
current %
10 0
8 0
6 0
4 0
2 0
75
25 5 0
Mot or coo ling curv e wit h indepen dent fan
Factory Setting: 60.0
Motor rated
125 frequenc y %
10 0 1 50
F= 50Hz
F= 40Hz
F= 20Hz
Motor l oa din g ra te
(%)