When the power supply of the main circuit and control circuit is separated, does the undervoltage warning occur if the power failure occurs only at the main circuit? (Under the condition where power at the rated voltage is continually supplied to the control power supply)When the main circuit is normal and the control power supply is OFF, does the under voltage warning occur by the time the capacitor runs out of charge?

The Undervoltage warning of the inverter is judged based on the voltage of the main circuit as follows. Power failure only at the main circuit: Output an Undervoltage warning power failure only at the control circuit. Not output an Undervoltage warning when the...

What is the difference between a VFD and a VSD?

Nothing. Both terms are used for describing drive inverters. They are prominently being used interchangeably, depending on the manufacturer of the country. (For Mitsubishi FA, the term VFD is mostly used.). VSD (Variable Speed Drive) refers to the motor shaft...

Can I use a VFD as a voltage converter?

In one word, no. A VFD cannot be used as a replacement for a voltage transformer. If a motor requires 400Vac, then a 400Vac source is required as an input to the 400Vac VFD. The same goes for other voltage classes, The only exception to this rule is with phase number....