Wiring VFD with no backup supply
Posted: Fri Oct 22, 2021 2:35 am
I am switching from a Hitachi SJ-P1 to a Delta C2000. The SJ-P1 has a separate power input for the logic and inverter. When E stop is pressed, the main contactor disconnects main power to the inverter, but it's logic remains powered and it keeps trucking on. Eventually it faults due to loss of power supply...
The C2000 has only one power supply input. The manual says it should be wired through a safety contactor and I intended to wire it to the same powr supply I am currently using. This means that on E-Stop, the VFD will be powered down completely. A bit nasty given the inrush current that occurs every time it is turned back on.
I know C2000s are commonly used, so I am wondering how people wire them. I was wondering about powering the drive without a contactor and putting E-Stop through the STO terminals. Thoughts?
The C2000 has only one power supply input. The manual says it should be wired through a safety contactor and I intended to wire it to the same powr supply I am currently using. This means that on E-Stop, the VFD will be powered down completely. A bit nasty given the inrush current that occurs every time it is turned back on.
I know C2000s are commonly used, so I am wondering how people wire them. I was wondering about powering the drive without a contactor and putting E-Stop through the STO terminals. Thoughts?