Here are several. We don't know which one would be the 'main' one.
Power =
(voltage) x (current)
(voltage)2 / (resistance)
(current)2 x (resistance)
(energy) / (time)
(voltage) x (current) x (power factor)
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An emergency generator is attach to a location power supply and electricity. When the power supply or electricity shuts down unintentionally the emergency generator will send power to the things that it is attached to that is designated, until the main power is back on.
Electricity does flow back to the power plant. This electricity is what forms the circuit needed to actually deliver the electricity to you when you need it.
Electricity doesn't give power. Power is simply the rate at which work is done in an electric circuit.
ATS (automatic transfer system panel) it will transfer load from main power to emergency without operation when the power source drop below 80% or normal voltage while AMF (automatic main failure panel) this will substitute as main electricity source and reserve the generator if the main supply fail or down.
creates electricity