Open Circuiting the Secondary Circuit of a Current Transformer

Electrical Measurements

This set of Electrical Measurements Questions and Answers for Freshers focuses on “Open Circuiting the Secondary Circuit of a Current Transformer”.

1. In a C.T., the primary ampere turns is variable.
a) True
b) False

2. The secondary circuit of a C.T. is open when?
a) a very high flux density is produced
b) a very low flux density is produced
c) a moderate flux density is produced
d) no flux density is produced

3. High flux density leads to _________
a) a decreased voltage in the secondary
b) a decreased voltage in the primary
c) a increased voltage in the secondary
d) a decreased voltage in the primary

4. When primary current flows, secondary circuit should be open.
a) True
b) False

5. High magnetizing forces in the core when removed suddenly lead to ____________
a) no residue
b) partial residual magnetism
c) rupture of the device
d) residual magnetism

6. The secondary winding of a C.T. ____________
a) can be shorted
b) can’t be shorted
c) can be opened
d) can’t be opened

7. The secondary winding of a C.T. is opened when?
a) C.T. is magnetised
b) C.T. is demagnetised
c) C.T. is shorted
d) C.T. is opened

8. The rectangular type of C.T. is built of _________
a) L shaped windings
b) T shaped windings
c) A shaped windings
d) Z shaped windings

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