YASKAWA GPD-506V

Continued
• General-purpose and blower-cooled motors
Induction motors are classified as general-purpose or blower-cooled motors, based on their
cooling capabilities; the motor overload detection function operates differently, as shown,
for each of these two motor types.
NOTE: If a TEFC motor is going to be run at or near 100% of rated current at
frequencies below 30 Hz for an extended period of time, select the blower cooled
curve (n034 = "INV Motor/8 Min" (" 3 ").
5-58
0
50
100
150
200
200
100
50
20
10
5
2
TIME (MIN.)
40 Hz
60 Hz
40 Hz
60 Hz
IM
IM100
(%)
n034 = STD Motor / 8 Min. (" 1 ") Upper Curve
n034 = STD Motor / 5 Min. (" 2 ") Lower Curve
IM = ACTUAL MOTOR CURRENT
IM100 = MOTOR BASE CURRENT (n033)
20 Hz
10 Hz
0 Hz
10 Hz
0 Hz
20 Hz
Electronic Motor Thermal
Protection Characteristics
For General-Purpose Motor
0
50
100
150
200
200
100
50
20
10
5
2
TIME (MIN.)
IM
IM100
(%)
0 Hz
5.6-60 Hz
0 Hz
5.6-60 Hz
IM = ACTUAL MOTOR CURRENT
IM100 = MOTOR BASE CURRENT (n033)
n034 = STD Motor / 8 Min. (" 1 ") Upper Curve
n034 = STD Motor / 5 Min. (" 2 ") Lower Curve
Electronic Motor Thermal
Protection Characteristics
For Blower-Cooled Motor
5.26 THERMAL OVERLOAD PROTECTION