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Reflections at a short-circuit

by freddyfish
Tags: reflections, shortcircuit
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Mar2-13, 09:52 AM
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sophiecentaur's Avatar
P: 12,261
Should be required viewing for everyone, before they think of asking questions about waves 'n' things on PF.
So much for Computer Graphics.
Mar2-13, 10:10 AM
P: 575
Actually - I never totally got my brain around this until I used a Time Domain Reflectometer (TDR) - the wiki is

Basically is it a RADAR for a transmission line - when set to the right line type, it will tell you distance to AND type of fault ( Short, Open, impedance mis-match - etc).

I started using a thumper ( ) which evolved into a TDR-Thumper ( ) The thumper name comes from the sound, used on Medium V ( 1000-69KV) buried cable, when you shoot a 1000J down the cable - and it hits the fault - it makes a thump - of course when you dig up the cable and still can not find the fault you do it again - then it is a BANGer!

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