This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
What is Safe Torque Off (STO) in the Variable Speed Drives?
Safe Torque Off (STO) is a method the variable speed drive (VSD) is prevented from producing current or voltage to the connected motor.
It is used in Emergency Stop schemes where the motor will coast to stop.
The STO prevents direct IGBT devices from firing for safe operation.
Released for: Schneider Electric Egypt and North East Africa
