Videos on how to test the big transformer for LF inverter

Videos on how to test the big transformer for LF inverter
http://www.powerinverter-au.com/
Videos on how to test the big transformer for LF inverter.
On 12v to 220v:
http://video.tudou.com/v/XMjQ2MDk3MzE3Mg==.html?spm=a2h3j.8428770.3416059.1
On 24v to 220v:
http://video.tudou.com/v/XMjQ2MDk3MzE3Ng==.html?spm=a2h3j.8428770.3416059.1
On 48v to 220v:
http://video.tudou.com/v/XMjQ2MDk3MzEyNA==.html?spm=a2h3j.8428770.3416059.1