... 1,Small volume, light weight, easily to operate. 2,Unlike DC test, 0.1HZ Digital Very-low-Frequency High Voltage ... ultra-low frequency source.Advantage of 0.1Hz SVLF series1,Small volume, light weight, easily to operate. Theoretically speaking, the ... of independent intellectual property rights according to power standard4. Multi-frequency selections (0.1Hz,0.05Hz,0.02Hz) strengthen the load-bearing ...