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Tech: What is Dielectric Test(Withstand Voltage Test, Hipot Test)?2020-06-25


What is Dielectric Test(Withstand Voltage Test, Hipot Test)?



Dielectric Test System(Withstand Voltage Test System, Hipot Tester)for lab, factory or power grid as factory test or routine maintenance test on material or equipment. 


A dielectric withstand test or high potential test is performed on component or product at required potential and time duration, by monitor leakage current to determine its insulation effectiveness, qualifying its operation safety on rated electrical condition. 

A dielectric withstand test or high potential test performed without partial discharge interference, need use high insultated material and filtering measures to control the PD produced by PD withstand voltage test system. 


Ⅰ.  AC Resonance HIPOT TEST SYSTEM, Please click on the picture or title to view more!

-Low cost. -Convinient. Easy parallel and/or Series with reactors. Small Volume & weight(each single device)


1. HVTF1 AC Resonant Hipot Test System for Power Equipment (20-30-300Hz, 30-30000KVA, 0-1000KV)

      HVTF2 Cable Resonance Withstand Voltage Test System (1-8A etc, AC, 1-10-60min etc)

     Object: XLPE Cable of all voltage levels, transformer, motor generator, switchgear, GIS, busbar, etc.  


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2. HVTG Series Resonant Hipot Test System (45-65Hz, Adjustable Inductance)

     HVTGG Series Resonant Hipot Test System( 50HZ, Adjustable Inductance)

     Object: UPTO 800MW hydro-generator group, UPTO 1000MW Thermal power generator group.  

    HVCVT AC Resonant Dielectric Test System for CVT( 50HZ, Adjustable Inductance)


1589803200568875.jpg            1589803322899117.jpg

 


Ⅱ.  AC/VLF/DC HIPOT TEST SET, Please click on the picture or title to view more!

1. HVYD Power Frequency Hipot Test Set (50HZ 60HZ etc, AC (optional DC), 1min etc, simple wiring)

     HVSY-Series Portable Hipot Tester(1.5KV  5KV  10KV,Transformer and control part Integrated together)

     HVST Safety Tools AC Insulation Test Set(Test insulation performance for insulation gloves, boots, mats, hats, rod( 6-110kV), electroscope(6-110kV) etc)

1590031478912992.jpg            1589804909432262.jpg             1589994388160027.jpg

    

2. HVVLF Hipot Test Set (0.1Hz Ultra/Very Low Frequency with lower cost, smaller volume, nondestructive test)

    Object: Cable, power transformer, large generator

3. HVZG DC Hipot Test Set (nondestructive,  smaller and portable)


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III. Comparison:  Inductance Withstand Voltage Test VS Power Frequency Withstand Voltage Test, please click on the picture or title to view more:


Above power frequency withstand voltage test set measures the withstand voltage of the main insulation.

Below induction withstand voltage test set measures vertical insulation withstand voltage. 

For detail, pls click to check: Technology: Why need to do inductance withstand voltage test? 


1592051119856880.jpg  1592051119856880.jpg 




IV. Comparison: Insulation Resistance Testing VS Dielectric Withstand Testing, please click on the picture or title to view more:

HVKV Insulation Resistance Tester generally runs below 1000 Vdc (5KV,10KV,15KV available) and return value in ohms. 

Dielectric withstand test generally runs over 5000 Vac 6000 Vdc and return value in milliamps.

1592453280665534.jpg  HVBKV-Series-Insulation-Resistance-Tester.jpg