THREE PHASE MOTOR STARTING AUTOTRANSFORMERS

PRIMA  motor starting auto transformers have been an industry standard for many years.

Auto transformers are a significant component of a motor controller. In their simplest form, motor starters start and stop a motor and protect against over voltage and under voltage. In most applications, a simple full-voltage magnetic starter places full voltage across the motor’s windings on start up and maintains full voltage at the motor during the run mode. For larger motors, or motors where the load is connected, the effect of motor-starting inrush can stress the electrical system with significantly lower currents in the distribution network.

This can cause all manners of disruption to the system with subsequent interruption in the facility. In these cases, reduced-voltage starting must be applied. The addition of a motor starting auto transformer during the start up sequence limits the starting inrush current. The PRIMA ATS is designed for Medium Duty service including applications for drive loads such as pumps, compressors, conveyers and fans.