75 hp (55 kW) VFD, 3 Phase 230V, 440V, 480V

75 hp (55 kW) heavy duty variable frequency drive for energy savings, three phase 230V, 440V, 480V for choice.

Specification:

Note: ATO VFD Cannot be used as a power source, it Can only be directly connected to an induction motor to control the motor speed.

Tips: Variable Frequency Drive Overload
Overload is also one of the frequent failures of VFD. When meet with the problem, we should first analyze if the motor overloads or VFD itself overloads. Generally speaking, the motor has high overload capacity, as long as the VFD parameter is set properly, it will not appear motor overload. But the VFD overload capacity is relatively not high. It is easy to appear overload alarm. We can detect the VFD output voltage, output current, and detect circuit and other trouble points one by one for trouble shooting.
For example, a 75hp VFD often displays "OL" when running.
Analysis and maintenance: According to the response from customer, this VFD was originally used in the 50hp motor, but now it is used for 75hp motor without resetting any parameters, so the problem may be out on the parameters. After checking, set VFD limit current as 75hp motor rated current instead of 50hp, and finally the problem is solved.