Basic of Electrical Engineering

Norton's Theorem

Norton’s Theorem The Norton’s theorem explains the fact that there are two terminals and they are as follows: • One is terminal active network containing ...

Why AC systems are preferred over DC systems?
Due to following reasons, AC systems are preferred over DC
systems:
a. It is easy to maintain and change the voltage of AC
electricity for transmission and distribution.
b. Plant cost for AC transmission (circuit breakers,
transformers etc) is much lower than the equivalent DC
transmission
c. From power stations, AC is produced so it is better to use
AC then DC instead of converting it.
d. When a large fault occurs in a network, it is easier to
interrupt in an AC system, as the sine wave current will
naturally tend to zero at some point making the current easier
to interrupt.

Why AC systems are preferred over DC systems? Due to following reasons, AC systems are preferred over DC systems: a. It is easy to maintain and change the voltage of AC electricity ...

The typical value of SCR for modern
alternator is
1.5.
0.5.
1.0.
1.2.
Hints
Always the typical value of SCR for modern
alternator is 0.5.