Motor Controllers Reducing Full Load Starting Current

A motor starting direct on-line can pull six to nine times its normal full load current in that first instant, a surge that places significant strain on the electrical supply, associated switchgear and the mechanical transmission all at the same time. It's a well known issue in industrial and commercial settings, yet many sites still run this way simply because it's the established, simplest starting method.

Integra from Suresense manages this starting current directly through its soft start function. Instead of the motor drawing that full inrush current instantly, Integra ramps power up smoothly and progressively, meaning the motor still reaches full working speed reliably but without the harsh electrical spike a standard direct on-line start would create.

Reducing this starting current has knock-on benefits across the site beyond the moment of starting itself, including less disturbance to supply voltage for other connected equipment, reduced stress on contactors and switchgear, and lower mechanical shock transferred into the drive train.

Combined with Integra's ongoing load sensing during normal running, this makes it a comprehensive way to address both the starting and running inefficiencies of a standard fixed speed motor installation.

Suresense can review a site's existing starting arrangements and recommend where fitting Integra would deliver the greatest reduction in starting current and associated electrical stress.