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Electrical Applications 2 by David W. Tyler

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3 Tariffs and power
factor correction
Aims:
At the end of this chapter you should be able to:
Define maximum demand,
diversity
factor, load factor
and power
factor.
Explain the need for and the use of
a
two part
tariff.
Calculate
the charges for
electrical energy
on
various
tariffs.
Calculate
the
savings
to
an industrial consumer brought
about by
an
improvement
in
power factor.
GENERATION AND The cost of generation and transmission of electrical energy is
TRANSMISSION COSTS divided into two parts:
1 Capital charges
2 Running charges.
Capital charges In order to build a power station or a transmission line money
is
bor-
rowed and interest paid annually. Money is also put aside so that i