Our power was off for three hours today. It was quite a wide area. Today was very cold here. What I was wondering was, what happens when they put it back on? I mean, every thermostatically controlled device would be 'on', every battery-backed device would need recharging. The load must be enormous. Hypothetically, if you could measure the resistance the power was feeding into, what would it be? What tiny fraction of an ohm? Presumably the power network has some reactive and inductive elements, so what happens there when there's this sudden rush of power? How do they physically switch the power back on? Maybe the switch is immersed in something. Doesn't the sudden demand cause problems for the grid?
Bill