Electric HV Withstand Test AC Hi-pot VLF Cable Tester /Very Low Frequency Tester With Factory Price

The importance of VLF testing!



VLF testing uses very low frequencies as part of an AC cable maintenance routine. VLF testers are smaller and more practical than AC testers but output the same amount of power as a 50 Hz mains device. This combination of size and power makes Very Low Frequency cable testing perfect for testing longer sections of cable and apparatus.



This equipment negates the need for on-site generation, large step down transformers or generating company supplies to be employed to power the items under test.



Because VLF testing supplies a working frequency of 0.1Hz as opposed to the 50/60Hz usually required for live transmission, the physical size of the VLF test set is massively reduced. Critically, the test object still receives the Alternating Sinusoidal Voltage that would be supplied through everyday use, but the size of the test equipment is much smaller.







Introduction--HV Withstand Test AC Hi-pot VLF Cable Tester



Ø VLF Tester is designed and manufactured for electrical equipment very low frequency withstand voltage test.



Ø Very low frequency withstand voltage test is essentially an alternative of power frequency withstand voltage test. It is much smaller, lighter and portable than power frequency withstand voltage tester. It is proved home and abroad that 0.1Hz ultra-low frequency withstand voltage test can replace power frequency withstand voltage test.



Ø It can be applied for 10kV, 35kV, 300MW thermal power machine, 10kV, 35kV power transformer and other electrical equipment







Features--HV Withstand Test AC Hi-pot VLF Cable Tester



Ø Data of current, voltage and wave form can be directly sampled at high voltage side, so the data is real and accurate;



Ø Over-voltage protection: If the output exceeds the set limit of voltage, the instrument will shut-down to protect itself; the actuation time is less than 15ms;



Ø Over-current protection: it is high-low voltage dual protection in the design, the accurate shut-down protection can be made according to the set value at high voltage side; If the current on low voltage side exceeds the rated current, the instrument will take shut-down protection, the actuation time are both less than 15ms;



Ø A high voltage output protective resistor is provided in the voltage boost body in the design and this eliminates the need of additional protective resistor connected outside;



Ø As a result of high and low voltage closed-loop negative feedback control circuit, the output without capacities rise effect;



Ø High-voltage control part adopts innovative light control HV switching unit, control is accurate, safe and reliable;



Ø With color man-machine interface touch control plus controls modular software operating system, precise and intuitive;