| Comment | I was an engineer for Scottish power for 30 years, there are different level of power cuts based on what equipment faults, starting with low voltage, then high voltage, then extra high voltage and finally transmission. The higher the voltage the more of the city goes off, but also the rarer the fault. Dips in power (rapid off then on again) are usually caused by networks adjacent to the fault which can draw a lot of power before the fault is automatically cleared. If you are on the network that clears you will be off until the fault is isolated. If you are just an adjacent network you can just see a dip in power. Transmission faults can cause district wide dips but are usually very quick to return to normal. Unfortunately as well these dips can also be repeated over a number of hours as one of the only ways to find a fault is to partition the network and close the switch to see what happens. If it trips you have won a watch and you go back to bed once you isolate it and put everyone's supply back on! Ah, those were the days....😂 |
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