... Variable Frequency AC Power Supply 1.50Hz, 60Hz, adjustable between 45 and 70 Hz, 400Hz 2.Phase Voltage Range: 0~300V, 0-150V Variable Frequency ... AC Power Supply Specification:• Circuit Type: (IGBT) ... 25%, -10%~-30% available for presetting.• Output Frequency: 50Hz, 60Hz, adjustable between 45 and 70 ... 150V~300V: 21A Variable Frequency AC Power Supply