4-136
08- 05
Selection for motor overload protection (OL1)
Range
【xxx0b】:
Motor overload is invalid
【xxx1b】:
Motor overload is valid
【xx0xb】:
Cold start of motor overload
【xx1xb】: Hot
start of motor overload
【x0xxb】:
Standard motor
【x1xxb】:
Frequency-conversion motor
【0xxxb】: Retain
【1xxxb】:
Retain
Selection for motor overload protection (OL1) (08-05).
‧Set the overload protection function for the used motor by 08-05.
‧ When two or more motors are connected to the same inverter, please turn off the
motor overload protection function (set 08-05 = xxx0b), and apply other methods
to provide overload protection, for example, connect a thermal overload switch to
each motor power.
‧ When the power supply is normally switched on or off, the motor overload
protection function 08-05 = xx1xb (thermal start protection characteristic curve)
will be reset each time because of the thermal value when the power is switched
off.
‧ For the motor with cooling fan (special motor for inverter or V / F motor), thermal
consumption has nothing to do with the rotation speed, set 08-05 = x1xxb.
‧ Use electrical overload protection to protect the motor from overload. Set
parameter 02-01 according to the rated current on motor nameplate.
‧ Refer to Figure 4.3.71 for the example of motor overload protection standard
curve (08-05 = x0xxb).
Figure 4.3.71 Motor overload protection curve (example of standard motor)
08- 06
Start-up mode of overload protection operation (OL1)
Range
【0】: stop output after overload protection
【1】: Continuous operation after overload protection.
‧ 08- 06 = 【0】: After the electronic relay for motor protection acts, the inverter
will immediately be blocked and flash OL1; press RESET or reset the external
reset terminal for further operation.
‧ 08- 06 = 【1】: After the electronic relay for motor protection acts, the inverter
will continue to operate, but the inverter will display OL1 in flashing way until
the current drops below some value. At this moment, the OL1 flash display will
disappear.
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