Answer / iamdon

Black-out:
Sequence of events following the voltage instability
leading to very low voltage or almost no voltage in a
significant part of the system.This is a natural phenomenon.

Brown-out:
Reduction made in voltage at load end to reduce power
demand so that the Black-out situation can be averted.This
is done artificially.With the reduction in voltage, power
flowing through transmission line reduces.This avoids the
cascade tripping of heavily loaded lines.

Author:arbelectbit@yahoo.com

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