The RSBS series soft starter is designed for single-phase compressors and is well-suited for use in single-phase voltage networks that are prone to voltage fluctuations. The high inrush current caused by starting compressors in these conditions can cause lights to flicker, fuses to trip, generators to stall and other disturbances. This soft starter uses a current-limiting algorithm to reduce compressor start current by more than 50% when compared to direct online (DOL) starters, says the company. Its control algorithm automatically detects when the compressor reaches full speed to make sure that the internal bypass relay switches on when the current is at an optimal level.
