Theyre opening an isolator on high voltage lines. Basically the isolator is used to isolate a section of the line or the substation for them to work on. Imagine how much power is going through this thing.
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Congratulations, you have won the lottery and have cashed your cheque in at the bank. But on the way to the ice-cream parlour to spend it all on chocolate sundies and banana splits the money bag falls out of the car window...NO!!! You have to drive back up the one way road to pick up all the money. Play now!