2:55 and following -- the electron flow direction is drawn and described backwards. If the line/neutral circuit is attached to a positive voltage, and there is leakage to the grounded case, then there will be a positive current in the direction from the circuit to the case. A positive current, in this situation, is composed of the negative charges carried by electrons flowing in the opposite direction. Or to put it another way, the positive voltage on the circuit corresponds to a _deficit_ of electrons, and when that deficit is sufficient (high enough voltage), then electrons will be attracted from the case.
6:09 Great video! I wander if the leakage is 19mA, so we can say that the product pass the test? Another word, can I raise the break down current value to 50mA? And, if I test different reels of cable, different length has different value on same cable.
Good video, but I can't use it because when you run the test you fail to use the provided guards for your test equipment. Safety is crucial in our training. Thanks
David Valle, if safety is #1 and is a “given”, then why is it that so many electronic engineers and testing technicians get shocked every year, and in some cases they end up in the hospital? I didn’t criticize the content, in fact I recognized that it’s a good video, but when trainees see the trainer bypassing or avoiding safety devices (without a clear disclaimer) they figure they can do the same. It’s dangerous to think that safety is a given, processes such as this need to be poke-yoked. I have had to sit in front of OSHA and explain where our training, supervision and lack of safety devices failed to protect a seasoned and very experienced UL testing technician and what we were going to do differently to prevent from having another shock injury. Oh, and please don’t be so thin skinned when it comes to criticism
Is the argument that safety barriers should be in place during the hipot test to prevent someone from making contact with the UUT (unit under test)? Are you saying the hipot test can make the grounded metal of the UUT live at a high voltage if the dialectic is not sufficient? I ask because someone told me to press start on a hipot tester while he rested his arms on the enclosure. I refused and he got irritated. It was a 2200 volt test of a UL 508 enclosure. Thanks
Meggering = insulation integrity. Non destructive. Hi pot = Insulation breakdown or dielectric withstand strength. This can be destructive or non destructive.
thank you for the informative video Sir, wanted to understand this test for 3phase motor as well. can you specify what should be the time and leakage current allowed for production test of a 3 phase motor rated for 110V AC.?
Thanks for your question Roman. We recommend the power switch of your DUT be in the ON position to close any contacts or relays. This allows the Hipot test to check the entire circuit for leakage. If your DUT is in the OFF position you may only be testing up to the power switch and fail to test the entire DUT as intended.
Can we do hipot test with standard insulation tester? Some can do up to 1kv, 5kv, even 10kv; granted they give result in mega/gigaohms but can you work out the current through ohm's law and we're already know the voltage?
Hi-Pot testers can limit the maximum current and therefore not cause damage to the equipment when detecting it has bad insulation. Insulation resistance testers generally don't have the ability to control the current, therefore on higher voltages you can fry sensitive electronic equipment (if present). You may be able to repair the equipment insulation and keep using it when detecting it with a HI-POT, compared to if you IR test it on a higher voltage while you may detect faulty insulation, you have also probably destroyed the electronics if the current is able to flow across it.
Very good explanation of HiPot testing! Thanks for making this available.
Thank you for sharing. Now I know the basics for Hipot Test.
Very simple video to know the hipot test. Thanks for the video. He is saying micro amps instead of milli amps.
Great explanation on the hi-pot test. Wish your microphone was a little louder, but anyway great job!
2:55 and following -- the electron flow direction is drawn and described backwards. If the line/neutral circuit is attached to a positive voltage, and there is leakage to the grounded case, then there will be a positive current in the direction from the circuit to the case. A positive current, in this situation, is composed of the negative charges carried by electrons flowing in the opposite direction. Or to put it another way, the positive voltage on the circuit corresponds to a _deficit_ of electrons, and when that deficit is sufficient (high enough voltage), then electrons will be attracted from the case.
Thank you sir for the video it really help knowing what is hipot test,, as i am a mechanic i have no clue what was this ^^ Thanks again
6:09 Great video! I wander if the leakage is 19mA, so we can say that the product pass the test? Another word, can I raise the break down current value to 50mA?
And, if I test different reels of cable, different length has different value on same cable.
Really good explanation. Congratulations!
What if we have product with plastic body and where we can connect the ground?
So you are testing the integrity of the insulation, rather than the circuit itself?
Great video! Will have an audit next week and this helped a lot. Thank you very much.
You should tell that how we decided high pot test volt to different equipments👍👍👍
Good video, but I can't use it because when you run the test you fail to use the provided guards for your test equipment. Safety is crucial in our training. Thanks
They aren't provided! they cost extra! And you could just implement them and still do it this way..
Safety is number 1 that is a given. Take the video for the good info.... he made a really good video . Hold your criticism
David Valle, if safety is #1 and is a “given”, then why is it that so many electronic engineers and testing technicians get shocked every year, and in some cases they end up in the hospital?
I didn’t criticize the content, in fact I recognized that it’s a good video, but when trainees see the trainer bypassing or avoiding safety devices (without a clear disclaimer) they figure they can do the same.
It’s dangerous to think that safety is a given, processes such as this need to be poke-yoked. I have had to sit in front of OSHA and explain where our training, supervision and lack of safety devices failed to protect a seasoned and very experienced UL testing technician and what we were going to do differently to prevent from having another shock injury.
Oh, and please don’t be so thin skinned when it comes to criticism
Did he make the video for your commercial use?
Is the argument that safety barriers should be in place during the hipot test to prevent someone from making contact with the UUT (unit under test)? Are you saying the hipot test can make the grounded metal of the UUT live at a high voltage if the dialectic is not sufficient? I ask because someone told me to press start on a hipot tester while he rested his arms on the enclosure. I refused and he got irritated. It was a 2200 volt test of a UL 508 enclosure. Thanks
Hi, why do we disconnect all the neutral conductor in the switchboard when we do hipot test?
what is the difference on a hipot test and a megger test when it comes to motor winding?
Meggering = insulation integrity. Non destructive.
Hi pot = Insulation breakdown or dielectric withstand strength. This can be destructive or non destructive.
Do you need to remove the cable from SWGR before the cable test? What are the cons if the cable is connected on both ends of it
Great explanation
Hello I have a question what if we have 3pins, and test pin 1 to pin2 and pin1 to pin3, which one is going to be output lead?
How to calculate resistance from the withstanding test, if I use 2.2 kV and I got 0.02 mA. Can I use V = IR?
thank you for the informative video Sir,
wanted to understand this test for 3phase motor as well.
can you specify what should be the time and leakage current allowed for production test of a 3 phase motor rated for 110V AC.?
It should be written in the electrical code the motors are meeting.
Great content and explanation!
I have question for a test tool.
What value off current which can detected Pass or Fail?
How can we do AC 6 KV di electric underwater test of piercing connector?
Thanks for the video. If we do Hipot test kind of computer's power supply, should we turn on its On/Off switch or leave it off?
Thanks for your question Roman. We recommend the power switch of your DUT be in the ON position to close any contacts or relays. This allows the Hipot test to check the entire circuit for leakage. If your DUT is in the OFF position you may only be testing up to the power switch and fail to test the entire DUT as intended.
You have to turn on the power supply switch because you have to allow electrons to pass through the switch to the circuit.
Thank for your sharing
Nice explanation !
This was a great informative video. Thanks.
Hello,
A question: why hipot test lasts for a few seconds? what's going to happen if it last for a longer say 10 sec 1 min ?
Great video thank you
can hipot be used for testing leakage on capacitors?
Can i know the procedure of hipot testing
Nice one! Ty
You frequently reference microamps (μA), but I believe you mean milliamps (mA) - which is what the screen of your device shows.
1milliamp = 1000 microamps I believe. he just reads it in microamps. you are right the screen does display milliamps
Thanks well explained
Great job
Very helpful, thank you.
gret video thank you.
Hi, I like your video. Thanks
Thanks for the video man...
Can we do hipot test with standard insulation tester?
Some can do up to 1kv, 5kv, even 10kv; granted they give result in mega/gigaohms but can you work out the current through ohm's law and we're already know the voltage?
Hi-Pot testers can limit the maximum current and therefore not cause damage to the equipment when detecting it has bad insulation. Insulation resistance testers generally don't have the ability to control the current, therefore on higher voltages you can fry sensitive electronic equipment (if present). You may be able to repair the equipment insulation and keep using it when detecting it with a HI-POT, compared to if you IR test it on a higher voltage while you may detect faulty insulation, you have also probably destroyed the electronics if the current is able to flow across it.
great video
Thanks
That’s check out Roy l clay he is the orginaj
Nice video. But I think he is exposing too much, not safe. Shouldn't he close the lid, and make sure there is no voltage before touching anything?
it is helpful
Good. I am engineeing from Iraq
Those are "milli" NOT "micro" amps