0.1HZ-60KV-80KV ultra-low frequency high voltage generator

0.1HZ-60KV a ultra-low frequency high voltage generator, ultra-low frequency products and ultra-low frequency selection 1,60KV Table 1 Type Rated voltage load capacity of the power fuse weight use VLF-60 / 1.1 60kV (peak) 0.1Hz, ≤0.6μF 25A Controller: kg boost body: 55kg for 18KV and the following cables, generators 0.05Hz, ≤1.2μF 0.02Hz, ≤3.0μF 2, based on test subjects to select the appropriate specifications. When used, the test instrument must not exceed the capacity of the rated capacity. Test capacity is too small, it will affect the output waveform. If less than 0.05μF, the instrument will not be output normally. Parallel 0.1 μF capacitor auxiliary output. Here are some of the electrical capacity of the device, for reference. Different generators single relatively capacitance Scale 2 thermal power and hydropower generating capacity (MW) 200 300 600 85 125-150 300 400 single relatively capacitance (μF) 0.2-0.25 0.18-0.26 0.31-0.34 0.69 1.8-1.9 1.7- 2.5 2.0-2.5 XLPE insulated single core electric power cable capacitance (μF / km) Table 3 capacitance μF / Km voltage kV 10 0.15 0.17 0.18 0.19 0.21 0.24 0.26 0.28 0.32 0.38 - 35 - - - 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.19 cross-sectional area cm2 16 25 35 50 70 95 120 150 185 240 270 3, the test current estimation methods: the formula: I = 2πfCU Second, the principle of ultra-low frequency dielectric withstand test ultra-low frequency dielectric withstand test is actually An alternative method of power frequency voltage tests. We know that at the time of the large generators, cables, and other test performed frequency voltage withstand test, because of their insulating layer exhibits a large capacity, it is necessary to test large-capacity transformer or resonant transformer. Such a huge number of devices, not only bulky, high cost, and very inconvenient. To solve this problem, the power sector with a reduced frequency of testing, thereby reducing the capacity of the test supply. From abroad for many years of theory and practice has proved that with 0.1Hz ultra-low frequency voltage test alternative frequency voltage withstand test, not only have the same equivalence, and the volume of the device is greatly reduced, greatly reduced weight, the theoretical capacity frequency of about one five-hundredth. Greatly simplify test procedures, and compared to the advantages of more power frequency test. That is why developed countries are using this method causes. Ministry of Wuhan High Voltage Research Institute has commissioned the drafting of the "35kV and below XLPE power cables VLF (0.1Hz) pressure test methods" industry standard. China is promoting this method, this instrument is based on our developed from this need. It can be widely used among the AC voltage test cables, large high-voltage rotating motors, power capacitors. 3. Product Overview This product combines advanced modern digital inverter technology, using computer control, boost, buck, measurement, protection is fully automated and automatic step-up process can be manual intervention. Since the all-electronic, so small size, light weight, large-screen LCD display, clear and intuitive, printer output test report. In full compliance with design specifications "electrical equipment for testing equipment General technical conditions, Part 4: Ultra-low frequency high voltage generator General technical conditions" power industry standard, easy to use. Now at home and abroad are using a mechanical approach to produce ultra-low frequency modulation and demodulation signal, there is no standard sine waveform measurement error is large, high-pressure part of a spark discharge, heavy equipment, and the sine wave of two, four-quadrant need High-power high-voltage discharge resistors shaping, so the larger the overall power consumption of the device. This product can overcome some shortcomings such, in addition, there are the following features to note: ★ current, voltage data are sampled directly through the high side, so the data true and accurate. ★ voltage protection: When the output voltage value exceeds the limit set, the instrument will shut down to protect the operating time of less than 20ms. ★ overcurrent protection: designed for high and low voltage dual protection, according to the high-pressure side setting precise shutdown protection; current low-voltage side will be shutdown protection than the rated current, the operation time is less than 20ms. ★ high-voltage output protection resistor design in boosting the body, so the outside does not need another protection resistor. ★ As a result of high and low pressure closed-loop negative feedback control circuit, the output rise in no effect. Fourth, the technical parameters 1, the output voltage: Table 12, the output frequency: 0.1Hz, 0.05Hz, 0.01Hz. 3, load capacity: See Table 1 0.1 Hz maximum 0.6μF 0.05 Hz maximum 1.2μF 0.02 Hz maximum 3.0μF 4, Accuracy: ± (3% full scale + 0.5KV) 5, the voltage waveform distortion: ≤5% 6 Conditions of Use: indoor, outdoor; temperature: -10 ℃ ∽ + 40 ℃; Humidity: ≤85% RH 7, Power: AC 50 Hz, 220V ± 5% 8, the power fuse: Table 1