Little Isolater Fire 

Memo: Do not read comments while drinking hot coffee.. LOL

I do not think the frequency range is 50hz, because it supposed to be 60 hz

@@ktg1012 This isn't the US guy. Its Aus, where they use 50Hz

Can confirm, our local AC supply is 50hz. AU/NZ

In Australia.. we need to Call 000 (112) our emergency call number, this is step one.. while the Supply distribution company is not on the call list, they are called by default. Reason? You do not have to carry the emergency call number for the Power distribution company - aside I have tried that at time and I get a quicker response when I go through the 000 than calling the distributor direct.

Yes - HV Isolation Switch - not sure of correct designation, this is the 11KV to the transformer

Correct Phase-Phase thanks to a bit of moisture and a lot of dust. The Isolation Switch was on the high side of the transformer, ie the 7.5 or 11KV Delta.

Australia bud.. we have 000.. and the call was made before starting the recording we had to wait for the local electricity authority (Ergon)to arrive to isolate, then repair.

@@GlennHurse ok thank you for letting me know this

a combination of Light rain and dust from protracted dry conditions.. The fire developed in the Isolation switch from the 11kv delta to the 240v Y transformer aka 11kv to Street voltage. The moisture allowed an arc to form between phases A couple of hours later new Isolation switch and some amazed civilians