Products Introduction
Ultra-low frequency dielectric strength testing is another method of power frequency withstand voltage testing, because large-capacity testing is required, and large-scale equipment is not only expensive, but also bulky. The power department did some tests to solve these problems. According to domestic and foreign tests, this product can solve this problem. Not only the size of the instrument is small, but the weight is greatly reduced.
Precautions
When carrying out 35KV cable test, one-phase test is strongly suggested. Voltage is set to 60KV (General Requirements)-78KV (according to the rules needed) and the frequency is set to 0.1Hz, 0.05Hz,0.02Hz and 0.01Hz. The manual said load capacity is the theoretical value, the scene 35KV cable length can reach 3-15 km.
In case the cable is too short(less than 500 meters), the capacitance of the test object is smaller than 0.1 F and the pressure cannot be normally boosted, please connect 0.1 F high-voltage capacitance in parallel way.
Keep high-voltage terminals nylon spin by the above numbers to the corresponding nylon seat, high-voltage lines to ensure good contact , no contact is good , it will cause a discharge , burned the high side . When nylon terminals tightened, pay attention to the intensity, excessive tightening may damage the nylon terminals.
80KV 0.1HZ VLF high voltage generator
Model
Rated Voltages
Load capacity
Fuse
Weight
Useful
VLF-80
80kV
(peak )
25A
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Generators
Products Introduction VLF high voltage generator 60KV.The capacity of it is 1/500 of traditional way. Greatly simplify testing procedures, That is why commonly used in the developed countries, china ministry of electric power entrust Wuhan high voltage research institute to drafting 35Kv and below XLPE insulated power cable ultra-low frequency (0.1Hz) voltage withstand test methods for promoting this approach. The instrument is developed according to China's made of this need. It can be widely used in cable, large-scale high-pressure rotary motor, power capacitors into AC voltage withstand test. Power capacitance of single-core XLPE insulated cable (µF/km) 0.1Hz -60KV Ultra-Low Frequency High Voltage Generator Model Rated Voltages Load capacity Fuse Weight Useful VLF-60 60kV (peak ) 0.1Hz, 0.5 µF 25A Control 6 HV TANK-I30 HV TANK-II 33 25KV and below the cable Generator 0.05Hz, 1.0 µF 0.02Hz, 2.5 µF 0.01Hz, 5.0 µF Precautions 1.Please use the STOP button and discharge by rod then shut down the power if you need to discontinue the machines which in the high pressure conditions.Otherwise it will damage the instrument! 2.Please operation it according to the screen instructions. 3.It is a normal phenomenon to see small amount of oil spill after boosting the pressure because the insulating oil in the booster is full, besides, it will not affect your use. 4.When carrying out 10KV cable test, one-phase test is strongly suggested. The voltage shall be 18KV and the frequency shall be 0.1Hz 0.05Hz 0.02Hz 0.01Hz. The manual said load capacity is the theoretical value, the scene 10KV cable length can reach 3-20km.
Products Introduction 40KV vlf high voltage generator of this product fully complies with the standards of the electric power industry. Mechanical methods are widely used to modulate and demodulate ultra-low frequency signals, but there is no standard sine wave, some errors in high-voltage part measurement and spark discharge. The product can overcome the above shortcomings. How to choose the suitable products for test Please make sure that the capacitance of test products is below the instrument rated capacitance. The waveform will be influence if the capacitance of test products is too small and the instrument can not normally output when it below 0.05µF. 0.05µF capacitor in parallel to auxiliary output. Below is capacitance of some instrument for your reference. 40KV vlf high voltage generator parameter : Model Rated Voltages Load capacity Fuse Weight Useful VLF-40 40kV (peak ) 0.1Hz,1.1µF 20A Control 6 Body Boost 50 Used for cable and generator with corresponding voltage 0.05Hz,2.2µF 0.02Hz,5.5µF 0.01Hz,11.0µF
Products Introduction 40KV vlf high voltage generator of this product fully complies with the standards of the electric power industry. Mechanical methods are widely used to modulate and demodulate ultra-low frequency signals, but there is no standard sine wave, some errors in high-voltage part measurement and spark discharge. The product can overcome the above shortcomings. How to choose the suitable products for test ï¼? Please make sure that the capacitance of test products is below the instrument rated capacitance. The waveform will be influence if the capacitance of test products is too small and the instrument can not normally output when it below 0.05µF. 0.05µF capacitor in parallel to auxiliary output. Below is the capacitance of some instrument for your reference.
Products Introduction VLF high voltage generator 70KV instrument can be widely used in cables, large-scale high-voltage rotating motors, and power capacitors for AC withstand voltage tests. The advantage is that the instrument is small in size, light in weight, and large LCD display. VLF high voltage generator 70KV Model Rated Voltages Load capacity Fuse Weight Useful VLF-70 70kV (peak ) 0.1Hz, 0.5F 25A Control 6 HV TANK-I 30 HV TANK-II 33 30KV and below the cable Generator 0.05Hz, 1.0µF
We can supply generator made by CATER PILLAR , USA This generator was made in 2006 but it has been kept for emergency use only and it did not operate long time. and it is almost new one. We welcome testing by engineers.
