>It was attributed to a 'power distribution transformer
>primary-secondary shorting event' ...

I wonder what the cause of the event was :)

A colleague who had worked at a power company in NZ told us of an incident
he came across where an opossum had managed to bridge the 400V distribution
voltage to the local 230V secondary side. Said animal took one last nose
dive into the bushes never to stir until found by the supply company
investigators.

The problem it caused though was in a local chicken farm. It had outfitted
the rearing sheds with high efficiency bulbs with electronic ballasts for
best power consumption. The high voltage spike from the flash over through
the animal blew a low ohms protection resistor on the input in each of these
bulbs. This caused panic among the chickens which resulted in many dead
chickens.

Apparently they replaced these resistors and the bulbs then worked again
satisfactorily.

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