... Star-delta start Softstarter Selection of a suitable Softstarter .16 16 17 17 18 Centrifugal pump Direct-on-line start (D.O.L) Star-delta start Softstarter Selection of a suitable Softstarter .19 ... (D.O.L) Star-delta start Softstarter Selection of a suitable Softstarter Contents Compressor Direct-on-line start (D.O.L) Star-delta start Softstarter Selection of a suitable Softstarter .27 27 28 29 ... Torque/speed curve when using a softstarter rpm Torque/speed curve when using a softstarter I I rpm Current curve when using a softstarter rpm Current curve when using a softstarter Different applications...