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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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 ...
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56 views

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 ...
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49 views

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 ...
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Programming KIKUSUI TOS9200/TOS9201

Using SCPI commands to program the AC/DC withstanding voltage/isolation resistance tester (HIPOT) I need to select a program by name, not a number... The manual states one can define a program number ...
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108 views

Ethernet transformer saturation at low frequencies

I am using a 10/100BASE-T Ethernet transformer TG110-E050N5RL (Circuit A in the datasheet) in a circuit. I am applying a 60 Hz 500 Vac hipot across C9 (T1 pin 16 and T1 chassis ground) as shown here: ....
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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 ...
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1k views

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 ...
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313 views

How to do insulation resistance measurement on a SMPS

Can anyone explain how to measure the insulation resistance of an isolated SMPS PCB? Is it correct to tie ACL and ACN and apply one terminal there, and the second terminal goes to the ground of the ...
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1answer
202 views

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 ...
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1k views

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 ...
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201 views

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 ...
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361 views

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 ...
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2k views

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 ...