Nerdy explanation:
When a primary line has a fault (keeping this general) there is a feature called a recloser which will wait a pre determined amount of time (~1-3 seconds) and re energize the line. This is usually due to higher resistance faults (tree falls on a line / crispy squirrel) which after the initial explosion, the fault usually clears (squirrel explosion). When the line is re-energized and the squirrel bits are far away, customers continue to get power while experiencing minimal down time. You can follow enmax power on twitter to see accurate power outages.
Sometimes reclosers have multiple shots, so you may see something like:
Initial fault
1 sec ->Reclose, line is energized
2nd fault
15 sec ->Reclose, line is energized
3rd fault, line does not reclose, crew is sent to investigate
This is why if you see a power outage in your house, power may come back once or twice and then go dark for an extended period
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Originally Posted by puckhog
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