4-67
Motor overload protection level is according to the setting of 08-11 and 08-12, as follows:
OL1 level
frequency
(base on rated F)
08-11=0 08-11=0 08-11=1 08-11=1
08-12=0 08-12=1 08-12=0 08-12=1
F<=33.3% 63% 63%
103% 113%
33.3%<F<90% 85% 88%
F>=90% 103% 113%
When 08-12=【0】: Overload protection for motors used in general purpose applications, as long as the
load demand is less than 103% of the rated current, the motor continues to run. If the load is larger
than 150% rated current, the motor will run for 1 minute only. (curve1).
When 08-12=【1】: Overload protection for motors used in HVAC applications(FAN, PUMP…so on).as
long as the load demand is less than 113% of the rated current, the motor continues to run. If the load
is larger than 123% rated current, the motor will run for 1 minute only (curve2).
Minute
1.0
150
Current
(
1
)
(2 )
5.0
123
113
103
08- 13 Over torque detection Control
Range
【0】: Over-torque detection is not valid
【1】: Over torque detection after set frequency is reached
【2】: Over torque detection after run command
08-14 Over torque protection action
Range
【0】: Stop output after over-torque detection (Free-run stop)
【1】: Continue to run after over-torque detection（Display only OL3）
08- 15 Over Torque Detection Level
Range
【30 ~ 300】
08- 16 Over Torque Detection Time
Range
【0.0~25.0】
08- 17 Fire Mode (for firmware below v1.1)
Range
【0】: Disable
【1】: Enable
Over Torque is detected when the output torque level exceeds the level set in Parameter 08-15
( Inverter rated torque is 100%) and if it is detected for a duration of time which is set in parameter
08-16.
When 08-14=【0】: If there is over torque, the inverter coasts to stop and flashes OL3. It is necessary
to press ’RESET’ or signal reset from input terminal to continue to run.
When 08-14=【1】: If there is over torque, the inverter can continue to run and flashes OL3 until the
output torque is less than the 08-15 set value.
Parameter 03-11/12(Multifunction output terminal) = 12, the output terminal signal will be set for over
torque condition.
※ Note: Over torque detection will be enabled only when parameter 08-13 is set to options 1or 2.
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