Challenges associated with the spread of top runner motors and the effects of soft starters in solving them.
Many facilities are experiencing issues with increased starting current, breaker malfunctions, and insufficient generator capacity. In particular, top runner motors (high-efficiency IE3 motors) have a starting current that is 1.1 to 1.4 times higher, resulting in an increased load compared to older motors (IE1). This has led to breaker trips and insufficient generator capacity. Effects of soft starters: Reduction of starting current → Prevention of breaker malfunctions, no need to increase generator capacity Prevention of water hammer → Gradual deceleration during pump shutdown to reduce piping damage and noise Extension of machine lifespan → Prevention of belt breakage, shaft damage, and gear damage Prevention of load collapse → Prevention of load collapse due to sudden stops of belt conveyors Prevention of damage to propellers and high-viscosity mixers → Reduction of shock during startup
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Product Specifications (α3 Series) Applicable Motor Range: 200V class 7.5 to 37kW, 400V class 7.5 to 75kW. Compatible with motor capacities in 4 types (A to D). Compact design (equivalent to A5 size), for installation inside control panels. Protection features: phase loss, overheating, reverse phase, error display, etc.
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Applications/Examples of results
Case Studies Widely adopted in fire pumps, water supply pumps, and drainage pumps in public facilities and private buildings. Transitioned from star-delta starting method and Condor method to soft start method.
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