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Electrical Engineering

Questions tagged [dielectric-breakdown]

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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.

46 questions
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3 answers
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I need capacitors rated for 50 kV. Buying them is an option but the ones with appropriate voltage rating I have seen cost more than 50€ which is far too much. That's why I want to make caps on my own ...
Maff's user avatar
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1 vote
1 answer
171 views

Under what conditions do capacitors fail as a short circuit instead of an open circuit? Additionally, what are the typical failure mechanisms associated with different capacitor types, and can any of ...
Marcus Müller's user avatar
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1 vote
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55 views

I constructed a axisymmetric FEM model of two electrodes, one at 500 kV, held apart by a solid dielectric component immersed in SF6 gas. I then extracted the information about tangential, normal E ...
toolic's user avatar
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1 answer
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For my simulation, I need to add a component that represents air with dielectric breakdown voltage of 1 kV. How do I do that?
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1 answer
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Partial discharge is a localized dielectric breakdown (DB) (which does not entirely bridge the space between the two conductors). Hence, there will not be a global flow of current between the two ...
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I'm trying to design a BMS which has the following characteristics: 20 lithium-ion cells in the discharging state, the cells are connected in series to develop a voltage of 84V max in the charging ...
bitsneak's user avatar
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-1 votes
1 answer
494 views

Everyone knows that the breakdown of pure, dust-free, dry air is around 32kV per cm. Despite doing a lot of research I can't seem to find even a range of values for ordinary air that consistently ...
Fred's user avatar
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1 vote
1 answer
421 views

I understand withstand voltage test is to check the insulation of a product, for example between a live metal part (AC input terminal block) and a dead metal part. I saw this specification in one of ...
Community's user avatar
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1 vote
1 answer
463 views

I've been trying to design a 1 MV hydrogen gas spark gap. I found the resistance of such to be in the range of 7 Ω/cm, not suitable for a target 40 kA current. Can I make the spark gap shorter without ...
colintd's user avatar
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1 vote
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I am a beginner in power supply units. I got a failed DCDC regulator board and confirmed a gate - source short in a PMOSFET (about 2 ohms in both directions). As far as I know, this board is a power ...
Yolanda's user avatar
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1 vote
2 answers
2k views

Top => copper PP1 => RO4350B L2 => copper PP2 => FR4 L3 => copper PP3 => 185HR L4 => copper This is my PCB stackup. In the top layer, I have a 50 Ω controlled RF trace. The ...
Rohat Kılıç's user avatar
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1 answer
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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 ...
Cristobol Polychronopolis's user avatar
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I have designed the layout of a PCB that will have an unique area with crimpage terminal connectors receiving 6KV by an external wire. I have done the shortest polygon (instead traces) for 9 PCB ...
Glorfindel's user avatar
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3 answers
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I need a switch for a high voltage application, say 5 kV, and I'm looking at relays. From a breakdown voltage standpoint, a contact with a 5 mm gap should be able to withstand 15 kV, which is 3x what ...
user319836's user avatar
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3 votes
1 answer
5k views

I'm trying to calculate the minimum voltage needed create a spark across 2 electrodes (needle shaped) in open air at normal ambient pressure. Usually, I would use the figure of 3000V /mm as the ...
JRE's user avatar
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