NESMA Blow Up Day!

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Haven’t heard of it? It’s a small, exclusive event run by the National Electrical Switchboard Manufacturer’s Association every 2 years in Victoria, to show the damage caused by Fault Current.

THEY LITERALLY BLOW UP CB’S, SWITCHES AND ENTIRE SWITCHBOARDS, ALL DAY!

They have their own SubStation and High Voltage switchyard to test Maximum Fault Current through various electrical devices, and all day there are different pieces of switchgear being subjected to Arc Flashes and Bolted Shorts, to see how high the current needs to go and how long it takes before the gear fails and blows up.

2 years ago, after around 10 progressively larger explosions, they blew up a 30 year old, 2,500 Amp switch with a bolted short on the load side.

I was around 10m away behind a perspex screen when this went off and the heat and the impact of the explosion was so strong that I was pushed 3 steps backwards. The screen bowed in and hit me and the wrench holding together the 8 foot high pieces of perspex blew right off the screen and bounced around like a ball.

IT WAS AWESOME!!

So this year, I really wanted to share it with our Mega Members! The whole event is by invitation only, and we took along 25 guys, who loved it almost as much as I did! I have more videos up on my website, including some awesome slow mo ones, so click over to my NESMA Blow Up Day page and have a look!

www.electricaltrainingonline.com.au/nesma-blow-up-day/

Alan Williams