Questions tagged [dielectric-breakdown]

Use this tag when the topic concerns a material which is designed to separate conductors is pushed beyond its voltage limits then allows current to flow. This can be in reference to capacitors or coax cable, among other things.

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1answer
45 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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0answers
33 views

How to calculate distance between two wire-pcb connectors with high voltage for keeping connectors isolation?

I'm planning the way of connecting 8 devices terminal wires all together within a 6kV point (V+), there will be 8 more wires connected to GND (V-). Those V+ and V- points will be in the metal case. ...
2
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1answer
61 views

Electrode shape in a triggered spark gap?

I was reading about spark gaps which are triggered with a third electrode, and I think that the concept is pretty straightforward, but the resource described the usage of a third electrode which would ...
24
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6answers
3k views

Why do high-voltage transformers need oil?

Someone told me that high-voltage transformers need oil because it prevents arcing. However, in terms of dielectric breakdown, isn't air the strongest? I remember from classes in college that as the ...
7
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2answers
1k views

Estimate capacitor parameters

I am thinking of making a capacitor, just for fun/for studying purposes. And I thought of the following exercise. In my local store, there exists rolls of polyethylene food film and aluminium foil. ...
3
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3answers
64 views

High voltage dielectric breakdown & layering insulators

I’m going to use 230 kV as the reference voltage for the example below; I know if I put a piece of metal too close to a 230 kV source it will breakdown the air and jump to the piece of metal causing ...
2
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2answers
96 views

What is the peculiarity partial discharge?

I'm studying partial discharge, and it's not yet clear to me what the difference is between an electrical breakdown and a partial discharge. Is partial discharge just a "small" electrical breakdown? ...
0
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1answer
169 views

Electrical Discharge Machining (EDM) an insulated metal

I am interested in using a Wire EDM process to cut some silicon steel. As defined by Wikipedia - “Electrical discharge machining (EDM), also known as spark machining, is a manufacturing process ...
0
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1answer
207 views

Working voltage vs dielectric withstanding voltage

What is the difference between working voltage and dielectric withstanding voltage in resistor components? Or both the working voltage and dielectric withstanding voltage is same? Can I apply the ...
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2answers
309 views

Is it OK to put traces under castellated PCB

If we would speak in general: what is the strength of the solder mask in terms of breaking voltage? So if we put one PCB with castellated pads on another board like this: What will heppen if both ...
1
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0answers
53 views

Question regarding dielectric breakdown (especially for stun guns)

This question occurred to me after looking at some models of stun guns. What I noticed was that some of them like one I bought had metal extensions sort of like prongs, or like tiny metal cones. I ...
3
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2answers
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 ...
1
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2answers
158 views

I need a power source for my DBD (Dielectric Barrier Discharge) [closed]

I need to make a circuit which gives me ac voltage in the range of 5-20 kV and frequency above 1 khz. The ac voltage which my lab gets is 50 hz 240 v. I need to somehow step up the voltage and ...
1
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1answer
1k views

What is electron trapping

I am reading an article in which they consider a model for charge transport in dielectric. The following figure can summarize the different procedures done in this manner: I am new in the domain ...
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1answer
89 views

Model of capacitor at breakdown

I have looked through the web and couldn't find a model of a capacitor at the moment of breakdown. After a circuit that I built failed, I took a few capacitors to test and found out that some of them ...
1
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1answer
100 views

Resistance of a material during dielectric breakdown?

Basically my question is that when a material (let's say air to be specific) undergoes dielectric breakdown with enough voltage, how conductive does it becoming during the breakdown? Maybe that ...