... Hz,136/68.2≤0.05%≤1%≤2%(Linear load)≥80%over-current,over-load, over-heat, short-circuit, alarm 560×650 ... , 400 Hz,272/136≤0.05%≤1%≤2%(Linear load)≥80%over-current,over-load, over-heat, short-circuit, alarm 660×820 ... ×1050 For more types and technical data, please contact with us. variable frequency power supply