Quote:
Originally Posted by harry chickpea
The grid doesn't work that way. Protection from lightning and such are increasingly built-in.
|
Assuming that a HIGH VOLTAGE lightning strike is synonymous with a low current surge on a high voltage line is not wise.
Lightning shunts work on the spike in voltage, whereas there are no shunts for a low current surge induced at
765 kV.
765 kV / 240 V = 3,187.5 factor
A typical lightning flash is about
300 million Volts and about 30,000 Amps.
On March 13, 1989, a powerful geomagnetic storm triggered a major power blackout in Canada that left 6 million people without electricity for 9 hours. According to the North American Electric Reliability Corporation (NERC), the flare disrupted electric power transmission from the Hydro Quebec generating station and even damaged some power transformers in New Jersey.
The strongest geomagnetic storm on record occurred in September 1859, known as the
Carrington Event, after the British astronomer Richard Carrington. During this storm, excess currents were produced on telegraph lines, shocking technicians and in some cases,
setting their telegraph equipment on fire.
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
