F4 Protection Parameters
【F4.07】
Motor Overload Protection (OL)
a. The motor overload protection is listed as below :
0: Motor overload protection: Disabled
1: Motor overload protection: Enabled (OL)
2: Motor overload protection of motor independent cooling fans: Enabled (OL)
b. Motor overload protection is to avoid the motor operating in the overload
condition for a long time causing damages to motor. Disabling the motor overload
protection may possibly damage the motor.
【F4.08】 Motor Rated Current
Motor rated current : Bases on the motor nameplate to set the value of F4.08. The
setting range: 10~150% of drive rated current ; Unit: Amp.
【F4.09】 Motor No-Load Current
Motor No-Load Current: about 1/3 of motor rated current. The setting range:
0~motor rated current ; Unit: Amp.
【F4.10】 Trip Time of Motor Overload
a. When the drive output current is over the motor rated current (F4.08), OL
protection is activated for trip time counting (F4.10).
b. The drive output current reaches 150% of the motor rated current (F4.08) and
continuously operates over the setting time(F4.10), the drive trips to OL
protection.
c. This function is to set the protection time when motor is overloaded. The setting
range: 0.5~10.0 min.
【F4.12】 Protection Level of Drive Overheat
The heat sink protection level of the drive reaches the protection level (F4.12), the
drive trips to OH protection. The setting range is 85~115℃.
【F4.13】 Drive Overheat Pre-alarm Selection
a. The settings are listed as below:
0: Disable
1: Warning (OHt): Continuous operation. (relay terminal outputs)
2: Warning (OHt): Drive de-rates the switching frequency automatically every 5
minutes. (relay terminal outputs).
3: Warning (OHt): Drive trips to “OHt” protection and stop, and the cooling fans
activate. After the temperature decreases lower than “drive overheat dead
band (F4.15)”, drive starts to operate again. (relay terminal outputs)
b. For relay terminal outputs, please see the function setting F5.26
【F4.14】 Drive Overheat Pre-alarm Level
Set the overheat pre-alarm level (OHt) of drive. The temperature of drive will
60
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