Insulation Preventive Test

The high-voltage withstand voltage test of electrical equipment is one of the most important items specified in the "Insulation Preventive Test". Withstand voltage tests can be divided into AC withstand voltage tests and DC withstand voltage tests. AC withstand voltage tests can be further divided into power frequency, variable frequency, and 0.1Hz ultra-low frequency testing technologies, among which the 0.1Hz ultra-low frequency technology is the latest and is recommended by the International Electrotechnical Commission. The new generation VLF series microcomputer-based 0.1Hz ultra-low frequency high voltage generator is a core product independently developed by our company. It overcomes many shortcomings of the first-generation mechanical products, and its cost-performance ratio is far higher than similar imported products. It is particularly suitable for withstand voltage tests of electrical equipment with large equivalent capacitance of insulation (such as power cables, power capacitors, large and medium-sized generators and motors, etc.), and complies with the requirements of the newly promulgated national power industry standard in 2004, "General Technical Conditions for Ultra-Low Frequency High Voltage Generators DL/T849.4-2004".


 



Product Aliases


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Ultra-low frequency high voltage generator, 0.1Hz ultra-low frequency high voltage generator, programmable ultra-low frequency high voltage generator, ultra-low frequency AC high voltage test device, ultra-low frequency withstand voltage test device



Product Features


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1. Advanced technology: adopts digital frequency conversion technology, microcomputer control, and the test process such as boosting, step-down, measurement, and protection is fully automated;


2. Easy operation: simple wiring, foolproof operation;


3. Comprehensive protection: multiple protections (overvoltage protection, overcurrent protection on high and low voltage sides), fast action (action time ≤20ms), safe and reliable instrument;


4. Safe and reliable: the controller and high voltage generator are connected at low voltage, photoelectric control, safe and reliable use;


5. Adopts high and low voltage closed-loop negative feedback control circuit, output has no capacitive rise effect;


6. Complete configuration: LCD Chinese display, automatic storage, automatic printing;


7. Large test range: 0.1Hz, 0.05Hz and 0.02Hz multiple frequency selection, large test range;


8. Small size and light weight: very conducive to outdoor operations;