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Chapter 4 Parameters|
4-70 Revision August 2008, 2ELE, V1.02
This parameter sets the time for how long over-torque must be detected before “OL2” is
displayed.
06.06 Electronic Thermal Overload Relay Selection (OL1)
Factory Setting: 2
Settings 0 Operate with a Standard Motor (self-cooled by fan)
1 Operate with a Special Motor (forced external cooling)
2 Operation disabled
This function is used to protect the motor from overloading or overheating.
40
20
60
80
100
25 50
100 150
rated frequency of the motor %
rated current of the motor%
Standard motor
(self-cooled by fan)
rated frequency of the motor %
rated current of the motor%
Special Motor
(forced external cooling)
25 50 100 150
40
20
60
80
100
06.07 Electronic Thermal Characteristic Unit: 1
Settings 30 to 600 sec Factory Setting: 60
The parameter determines the time required for activating the I
2
t electronic thermal protection
function. The graph below shows I
2
t curves for 150% output power for 1 minute.
350
50Hz or more
10Hz
5Hz
050100150 250200
300
250
200
150
100
50
Operation
time (seconds)
Load
factor (%)