gefran VDI100 Series Instruction Manual page 205

Low Speed
7.9
2.9
1.5
100%
High Speed
(60Hz)
28.8
3.9
1.7
106%
When using force cooled motors (Special inverter motor), thermal characteristics are independent of the motor
speed, set 08-05 = x1xxb.
When 08-05 = x1xxb, overload protection function is based on motor rated current for output frequencies be-
tween 6 and 60Hz. If the output frequency is lower than 1Hz, the overload protection function uses 83% of the
motor rated current to determine an overload condition.
When 08-05 = x0xxb, overload protection function is based on 70% of the motor rated current for an output
frequency of 20Hz. If the output frequency is lower than 1Hz, the overload protection function uses 40% of the
motor rated current to determine an overload condition.
Motor overload rating at different output frequencies is shown at Figure 4.4.72.
Code Parameter Name / Range
08-06 Start-up mode of overload protection operation (OL1)
0: Stop output after overload protection
1: Continuous operation after overload protection.
08-06=0: When the inverter detects a motor overload the inverter output is turned off and the OL1 fault mes-
VDI100 • Instruction manual
Figure 4.4.71 Motor overload protection curve (example: standard motor)
Hot Start
Motor Load Current (%)
(02-01 = 100%)
150% 200%
start activacted point
Hot Start
Motor Load Current (%)
(02-01 = 100%)
150% 200%
Figure 4.4.72 Motor overload rating at different output frequencies
Low Speed
12.4
4.5
Cold Start
2.4
100% 150% 200%
High Speed
(60Hz)
start activacted point
45.2
6.1
Cold Start
2.7
106% 150% 200%
Motor Load Current (%)
(02-01 = 100%)
Motor Load Current (%)
(02-01 = 100%)
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