Softstarter for heating pumps PF 9029 The PF 9029 from the MINISTART-family is a robust electronic control unit for soft starting of compressor motors with integrated monitoring functions. After successful starting the semicon-ductors are bridged by relays to minimize the power dissipation of the units. Advantages . For starting current limitation in heat pumps to provide stable mains conditions . Only one small device 67.5 mm for softstart, motor protection, voltage- and phase sequence monitoring . Soft start and minimized staring current . Extended service life of AC - motors and mechanical drive system . Motor power up to 18,5 kW . Short ramp up time 25 A: < 200 ms 36 A: < 300 ms . Energy saving by bridging of the semiconductors after softstart . Symmetrical staring current Features . According to IEC/EN 60947-4-2 . 3-phase controlled with integrated bypass relays . Phase sequence monitoring . Undervoltage monitoring . Overvoltage monitoring . Blocked motor monitoring in bypass mode . Integrated motor protection to class 10 acc. to IEC/EN 60947-4-2 . Starting current limitation . Thyristor monitoring . Detection of missing load . Automatic frequency detection of supply voltage . Temperature monitoring of power semiconductors Technical specifications Auxiliary voltage required: Yes Signalling output: Yes Widths: 67,5mm For three-phase motors, 400 V up to: 18,5kW Load voltage up to: 3AC 460V Extra functions: Temperature monitoring, Mains monitoring Type: PF 9029 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: PF9029.11 3AC400V UH=AC230V 5-25A Art. No.: 0065815