{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.
Search FAQs
Why I get CT inversion fault with TeSys T installed upstream the VSD?
When the motor is controlled by a variable speed drive (VSD):

- The current transformers (external or internal) must be mounted upstream of the variable speed drive, and not between the variable speed drive and the motor. The CTs cannot be used between the drive
outputs and the motor because the drive can output fundamental frequencies outside the 47-63 Hz range.

- Chokes must be mounted on the three phases, between the current transformers (external or internal) and the variable speed drive, to minimize the soft start harmonics current and the voltage disturbances
generated by the variable speed drive.
CT connection

Schneider Electric Nigeria

Explore more
Range:
Articles that might be helpful Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: