Motor soft starter MINISTART | PF 9029

electronicthree-phase

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. Features • According to IEC/EN 60 947-4-2 • 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 Advantages / Customer benefit • 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