1. (a) State briefly the consequences of opening the secondary of a current transformer when it...
1.
(a) State briefly the consequences of opening the secondary of a
current
transformer when it is in service. State the precaution to be
taken
should disconnection be necessary.
(b) A CT has a current ratio of 100/1. If the primary load
current is
100 A, determine the excitation current, the maximum ratio error
and
the maximum phase angle error if the burden is 5 ohms. The CT
characteristic gives an excitation current of 0.014 A for a
secondary
voltage of 5 V.
Homework Answers
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1.
(a) State briefly the consequences of opening the secondary of a
current
transformer when it...
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