Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [hipot]

Hipot is a contraction of the words High Potential. It describes a pre-defined test in which a 2-lead component MUST pass a high voltage AC (usually 50 or 60 HZ) and not only survive the test but have a maximum leakage current of 250 uA AC. Typical AC test voltages include 500, 1,500, and 2860. DC testing can be used in place of AC testing by testing the item at 1.414 times its rated DC voltage. Hipot testing is done as a 'shock' or arc safety precaution.

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If I put multiple isolated DC/DC converters in series, can I add their isolation voltages?

Suppose I have a DC/DC converter that's rated for 2250VDC isolation for one minute. If I put two of these devices in series, making sure to maintain proper clearances on my PCB, do I get an effective isolation voltage of 4500VDC for one minute? Am I…
Stephen Collings
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My fans are not marked with a withstand voltage between the circuit and the plastic case; what is best practice?

I'm designing a new series of products in metal chassis containing plastic fans. The fans' power supply is referenced to the negative DC rail of a variable-frequency drive, and the fans are mounted to the grounded chassis. That means the fan is…
Stephen Collings
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How do AC and DC hipot tests compare?

Suppose I have a DC/DC converter, Recom RPP30 for an example to hand. It lists an isolation voltage of 3000 VDC. How does this translate to an AC isolation voltage? Would this be equivalent to 3000 VAC RMS? 2121 VAC RMS (3000 peak)? Something else?
Stephen Collings
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Dielectric (HI-Pot Test) Failure on Ethernet Port

We have failure on Dielectric test between Power wire to Ethernet Port. Failure was observed near 1.7kV. After test Ethernet port was damaged (Phy chip). See attached Case 1 :- Where we apply High voltage between Power to Ethernet terminal. (see…
Bharav
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HIPOT testing and Y capacitors

The electric strength test OR dielectric withstand test OR HIPOT test voltage level as specified in EN 60730 standard works out to be 2860VAC for a class II radio product I am developing. The PCB has an isolated switched mode power supply with a…
Sam
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Ethernet - 3000V Isolation

I need some means to increase the Hi-pot rating of an Ethernet port to 3000V to meet regulatory approval. The Ethernet controller module is housed in a large metal enclosure and an 18" patch cord connects the controller to a back panel RJ45…
Sean Cahalan
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get the failed step name from KIKUSUI TOS9200/TOS9201

I'm using the KIKUSUI TOS9200/TOS9201 HIPOT tester, by setting a program number. If a step in the program fails, I use the MON command get the step monitor values. The information I need is in the step NAME. How can I get the failed step name?
DarkLight
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Is low humidity bad for HIPOT testing electrical harnesses?

From what I understand for HIPOT testing high humidity could be a potential issue because if cable insulators absorb moisture that could affect their resistance. What about low humidity? Is there any reason why low humidity would be bad for HIPOT…
David Allen
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Clearance of Exposed Nodes on High Voltage Relay

I'm trying to use this high voltage relay for a machine that will assist in HI-POT tests. The relay can handle about 10kVpeak according to the datasheet and I need it to handle 3.5kVrms maximum. I've run 3.5kV across the high voltage nodes in a…
IntiEngineer
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Hi Pot / Dielectric Pass/Fail Recording

I just graduated last year with an Electrical Engineering degree. Currently pursuing a Masters's Degree, so I am fairly new to design. We have several HiPot Testers we use on the manufacturing line. Currently, production workers manually record…
QuantumElectro
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Electrical insulation resistance of TO-220 package with SIL pad and plastic shoulder washer?

What would a ballpark insulation voltage (HI-POT) rating be for a TO-220 package (with a "hot" tab) mounted to a grounded heat-sink with SIL pad and shoulder washer? I am not seeing much documentation about this. I want to replace a TO-220 "FP"…
rdtsc
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Where do hi-pot multipliers come from?

I am researching AC vs. DC hi-pot testing. According to UL 508 and IEEE 421.3, a hi-pot test should, among other things, subject the unit under test to 1000 volts plus twice the rated voltage of the equipment for industrial control equipment rated…
Bort
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Mutually Insulated Circuit

I am reading through a HIPOT / Dielectric Strength requirement that states in no so many words: "withstand damage when 1KVac is applied between all mutually insulated circuits" I search every where and it must be my English but, I am not sure I…
DIODEX
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Hipot results vs surface area

I trying to hipot test a 12"x12" metal with kapton layer. Different sizes of metal (e.g. 1"x1", 4"x4", banana plug) is placed on top of kapton tape. The bigger metal produced higher leakage current as expected but it is also prone to hipot failure…
Ybx Nop
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DC hipot leakage current

I noticed that when testing hipot in DC I always get leakage current, but not during AC hipot testing. Do you have any ideas about this? My hipot tester is Quadtech Sentry 500VA. I’m testing a dielectric made of PEEK and alumina.
Ybx Nop
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