Altistart 22 Enclosed Altistart 22 Soft Starters Page 24 Enclosed Altistart 22

24 Altistart 22 soft starters for asynchronous motors Introduction The Enclosed Altistart 22 solid-state combination motor controller provides a pre-engineered, integrated solution for reduced voltage starting and soft stopping of standard three-phase asynchronous induction motors up to 500 HP at 575 V. The controllers enclosed in this offer improve your machine's performance and reliability while cutting installation costs by integrating an Altistart 22 soft start - soft stop unit and a circuit breaker disconnect in a stand-alone enclosure. The Enclosed Altistart 22 controller provides the benefits of reduced current inrush (and resulting voltage sag) and reduced mechanical shocks that can result from starting a motor across the line. A six thyristor (SCR) solid-state power configuration provides smooth acceleration and deceleration control of three-phase asynchronous motors. Control algorithms are integrated to help ensure smooth rotation throughout the starting ramp without mechanical instability at the end of starting. The ATS22 soft starter also features an integral shorting contactor to reduce steady state motor operational losses. The Enclosed Altistart 22 can even replace traditional low HP starters in commercial/ industrial applications. Applications The Enclosed Altistart 22 offers many functions that are compatible with these common types of applications found in the construction, infrastructure, or industrial sectors: Centrifugal pumps Piston pumps Fans Turbine blowers Refrigerant compressors Screw compressors Centrifugal compressors Material handling (conveyors, etc.) Specialist machines (agitators, mixers, centrifugal machines) The compatibility between the Altistart 22 soft starter and these applications are discussed in more detail on pages 4 and 5 of the Altistart 22 section of this catalog.

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