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General Mach Discussion / Re: Switch between wall plug and VFD?
« on: January 15, 2018, 09:07:10 PM »
Hi,
it is certainly not recommended that a switch or contactor be used to turn the VFD off under load. In an ermergency
yes do it but as a means of turning your motor off...no don't do it.
The probability of failure because the primary supply was switched (while driving a motor) is low. Switching on and off
between sessions should not cause any problems.
VFDs are pretty high-strung units and failures are not uncommon. Better and more expensive brands are more reliable.
Rapid deceleration of the motor causes a VFD considerable over voltage stress, even with a braking resistor. Do yourself
a favour and allow gentle deceleration when programming your drive.
Craig
it is certainly not recommended that a switch or contactor be used to turn the VFD off under load. In an ermergency
yes do it but as a means of turning your motor off...no don't do it.
The probability of failure because the primary supply was switched (while driving a motor) is low. Switching on and off
between sessions should not cause any problems.
VFDs are pretty high-strung units and failures are not uncommon. Better and more expensive brands are more reliable.
Rapid deceleration of the motor causes a VFD considerable over voltage stress, even with a braking resistor. Do yourself
a favour and allow gentle deceleration when programming your drive.
Craig