Important Facts On Dielectric Strength Or Hipot Tester Measures From An Electrical Engineering Perspective

By Carl Hughes


Dielectric Strength or Hi Pot testings are completed by applying massive voltage against testing wire and ground, usually locomotive chassis. On the off chance that excess current spills or if a current arc happens, test show failure. Insulation Resistance tests give numbers showing resistance insulation. Data on how hipot testers function are found below.

High Pot can be AC or DC and done periodically, or at production line end, etc. Stress test result typically shows Pass Fail based on leakage current. For some systems, this may prove dangerous. Testing Medium Voltage Cable may also prove risky.

Dielectric strength presents maximum electrical field that pure material may withstand underneath ideal setting without tearing down or without experiencing failure with its insulating properties. Theoretical dielectric strength is material intrinsic property on bulk material and independent configuration material or electrodes with which field is put to use. This inherent dielectric withstand corresponds what is being measured using untouched materials under controlled laboratory settings.

In breakdown, electric field effectively frees bounded electrons. When applied electrical field is high, free electrons coming from background current radiation may be accelerated with velocities that may liberate additional bounded electrons upon meeting neutral atomic particles, molecules within avalanche breakdown. Breakdowns occur quite suddenly, typically nanoseconds, causing an electrical conduction path formation and disruptive discharge through material. Towards solid materials, breakdowns severely degrades, even neutralizing, its capability to insulate.

Regarding insulation di electric testing variations, none exists. There exists no significant dissimilarity between dielectric testing and insulation. Di electric strength value basically shows how adept an electrically conducive object. Now about testing, frequency measuring volts must be verified by specific volt type insulating objects would receive during its operation period. Which simply means one must not DC withstand measure components that would be employed for AC 5060 Hertz purposes.

Whilst they are only two particular and altogether different techniques, these terms are irresponsibly tossed around reciprocally in trade. So you cannot without much stretch depend on those names precisely portraying what is being examined closely by way test was done. For instance, in Practice manual Dielectric Tests, wherein Di electric Tests within definition is mix of HiPot tests Insulation Resistance tests.

Though, commonly, HiPot analyzer being utilized for Di electric Quality test would satisfy usage towards Insulation Resistance analyzation. Particular terminology utilization would truly rely upon trade you are working, managing. In the event that it truly matters, you have to read given methodology label itself.

An Insulation Resistance tests would always show DC. Di electric Strength tests would usually AC but could be DC. If one see if one other could go through elimination as they investigate similar things, electrical experiments were done before. Conclusion was that they are both needed as they provide different data as their results.

An emphasis on these tests interchangeability would trivial because, at the end of the day, most insulated materials go through both as it unwise generally to pigeon hole your substance product into using only one frequency, electrical transmission when most cases it will work for both assuming they have same amount. Using 48v DC system, generally using materials with secondary rating around 600v ac should suffice. Ultimately as long as one does not fail hipot, everyones happy regardless of insulated matter used.




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