Functional Details 51
E500 Series Universal Low-Power Inverter
This parameter is used to set inverter’s sensitivity of thermal relay protection for
load motor. When the rated current of the load motor is not matching with the
inverter’s rated current, it is applicable to set this value to provide correct
thermal protection over the motor. When it is set to 110%, the inverter will
disable the motor overload protection function.
The set value of this parameter is determined by following formula.
This parameter is effective for inverters with built-in braking unit and is used to
define action parameters of inverter’s built-in braking unit. When the inverter’s
internal DC side voltage is higher than dynamic braking initial voltage, the
built-in braking unit acts. If external braking resistor is connected, the inverter’s
internal DC side pumping voltage energy will be released through the braking
resistor so as to reduce the DC voltage. When the DC side voltage reduces to
certain value ([F2.08]-50V), the inverter’s built-in braking unit is closed, as
shown in Figure 6-14.
F2.07 Motor overload protecting coefficient Setting range: 50 ~ 110 (
％
)
Figure 6-13 Sketch of acceleration torque and braking torque
When one inverter and multiple motors run in parallel, the
inverter’s thermal relay protection function will be disabled. In
order to effectively protect motors, it is suggested to install a
thermal protecting relay at the inlet wire terminal for each motor.
F2.08 Dynamic braking initial voltage Setting range: 300~400V/600~800V
[F2.07]= × 100%
电机额 定电流
变频器额定输出电流
Motor rated curren
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