Skip to main content

Timeline for How do I measure 10,000 A DC?

Current License: CC BY-SA 3.0

10 events
when toggle format what by license comment
Apr 27, 2017 at 14:04 comment added John D @PeterMortensen The peak currents lasted for several seconds. All the CRTs in the test building went wobbly due to the high magnetic fields generated in the cables leading out to the engine :) Of course today the LCDs would be immune.
Apr 27, 2017 at 11:54 comment added Overmind That's an useful source, John.
Apr 27, 2017 at 0:03 comment added user56384 I saw a small locomotive engine once, 16 cylinders the size of a basketball. Saw the engines and generators for a 300 foot long WW2 submarine. Batteries were below the flooring (yes, the original ones). Could generate 4 MW. Electric motors were used below the surface, diesel drove the props and the generators when on the surface. 20 knots max. It is at Muskegon, Michigan. Still gets out.
Apr 26, 2017 at 11:56 comment added Christian @MSalters: Depends on which end of the transformers you are measuring ;) And the TGV can run on 700V DC 4kA, I doubt is going at top speed in that case though.
Apr 26, 2017 at 10:53 comment added John U +1 for LEM, seen a lot of very good kit with their current sensors in it (on some chunky bus-bars too)
Apr 26, 2017 at 9:22 comment added MSalters High-speed rail doesn't actually use that high a current. E.g. the French TGV uses about 350A, but they use 25kV.
Apr 26, 2017 at 8:47 comment added Christian The train we currently build uses a maximum of 4kA. Permanently. And that's for a commuter rail, not high-speed
Apr 26, 2017 at 8:13 comment added metacollin Crap, I didn't see this answer before I posted mine. I mean, this is probably the best solution suggested so far.
Apr 26, 2017 at 5:46 comment added Peter Mortensen What was the timescale for that peak current? Seconds? Milliseconds?
Apr 25, 2017 at 20:35 history answered John D CC BY-SA 3.0