What causes an OSF, Mains Overvoltage fault on the ATV340 drive?
Possible Causes:
- Incoming supply voltage exceeding the drive’s rated limits at L1, L2, and L3
- Incorrect transformer tap settings resulting in elevated line voltage
- Power quality issues on the supply side, including voltage spikes or transients
- Line disturbances or switching events causing brief overvoltage conditions
- Harmonics or unstable supply contributing to DC bus overcharging
- DC bus voltage (PA to PC) exceeding the expected ~1.41 × line voltage
- Regenerative energy from the motor during deceleration
- Rapid deceleration or short ramp times generating excess energy in the DC bus
- Overhauling or high-inertia loads feeding energy back into the drive
- Absence of a braking resistor or insufficient braking capacity
- Improper grounding or installation contributing to voltage instability
- Utility supply fluctuations, particularly during low-load conditions
If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:
Frequently Asked Questions - Schneider Electric (se.com)
If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.
If you are not located in North America, please contact your local Customer Care Center for assistance:
Released for: Schneider Electric Canada
