3 ms·

I know you are quoting and not claiming but large high voltage transformers definitely wear out... They have lifetimes just like anything else!I am working on a

I know you are quoting and not claiming but large high voltage transformers definitely wear out... They have lifetimes just like anything else!I am working on a project replacing a 500kv GSU right now. I am curious what sort of fuse you think would prevent EMP-like damage though.

peddling-brink 5y ago
Why wouldn't a fuse protect from emp-like damage? My understanding is that an emp introduces electrical currents in the lines. Protecting the transformer from electrical overloads should protect it from emp. No?
- Xamayon 5y ago
  The damage may happen too quickly, similar to how typical fuses or circuit breakers won't protect you from a power surge or nearby lightning strike. Other tech would probably work though. Unfortunately, there's a lot of conflicting info on how powerful HEMP attacks, CMEs, etc would be/how much protection would be needed to have any effect at all. Having reliable info would greatly help for determining the feasibility of protecting systems all over the world. Regardless of 'criticality' even, as what good would the internet be if HN's servers and such are all down? ;)
- Animats 5y ago
  An EMP attack and a geomagnetic disturbance are completely different. EMP events have rise times around 10ns. Geomagnetic disturbances have rise times in minutes.
- jhayward 5y ago
  Geomagnetic storms are not EMPs. An EMP is a high-frequency, very intense burst in the electric field. A geomagnetic storm is a low-frequency, low-intensity change in the magnetic field. The effects of EMPs vs geomagnetics are very different.
olivermarks 5y ago
https://energsustainsoc.biomedcentral.com/articles/10.1186/s13705-019-0199-y https://energsustainsoc.biomedcentral.com/articles/10.1186/s... gic resistors https://www.gao.gov/assets/gao-19-98.pdf https://www.gao.gov/assets/gao-19-98.pdf

3 ms·

I know you are quoting and not claiming but large high voltage transformers definitely wear out... They have lifetimes just like anything else!I am working on a

by idiotsecant 5y ago

peddling-brink 5y ago
Why wouldn't a fuse protect from emp-like damage? My understanding is that an emp introduces electrical currents in the lines. Protecting the transformer from electrical overloads should protect it from emp. No?
- Xamayon 5y ago
  The damage may happen too quickly, similar to how typical fuses or circuit breakers won't protect you from a power surge or nearby lightning strike. Other tech would probably work though. Unfortunately, there's a lot of conflicting info on how powerful HEMP attacks, CMEs, etc would be/how much protection would be needed to have any effect at all. Having reliable info would greatly help for determining the feasibility of protecting systems all over the world. Regardless of 'criticality' even, as what good would the internet be if HN's servers and such are all down? ;)
- Animats 5y ago
  An EMP attack and a geomagnetic disturbance are completely different. EMP events have rise times around 10ns. Geomagnetic disturbances have rise times in minutes.
- jhayward 5y ago
  Geomagnetic storms are not EMPs. An EMP is a high-frequency, very intense burst in the electric field. A geomagnetic storm is a low-frequency, low-intensity change in the magnetic field. The effects of EMPs vs geomagnetics are very different.
olivermarks 5y ago
https://energsustainsoc.biomedcentral.com/articles/10.1186/s13705-019-0199-y https://energsustainsoc.biomedcentral.com/articles/10.1186/s... gic resistors https://www.gao.gov/assets/gao-19-98.pdf https://www.gao.gov/assets/gao-19-98.pdf