Current Transformers Design Test

1. What is the additional usage of the presspahn material used as insulation material?

lamination

to protect secondary winding conductor from mechanical damage

to reduce the losses

to protect secondary winding conductor from electrical damage

2. What is the insulation material on the primary conductor?

resin

bakelized paper tube and resin

bakelized paper tube

bakelized paper tube or resin

3. What is the other name of the ring type current transformer?

circular transformer

brush transformer

cloud transformer

bushing transformer

4. How is the reluctance of the interleaved corner related with the magnetizing current?

reluctance of the interleaved corner is indirectly proportional to the magnetizing current

reluctance of the interleaved corner is directly proportional to the square of the magnetizing current

reluctance of the interleaved corner is indirectly proportional to the square of the magnetizing current

reluctance of the interleaved corner is directly proportional to the magnetizing current

5. How many faces are present in the split core current transformer?

6. What is the bar type current transformer?

primary winding consists of a bar of suitable size and material

secondary winding consists of a rod of suitable size and material

secondary winding consists of a bar of suitable size and material

primary winding consists of a rod of suitable size and material

7. The current transformers are assembled on to the secondary conductors “on site” for either permanent or temporary duty.

false

true

8. What is the insulation material used in the current transformer?

elephantide or presspahn

elephantide

elephantide and presspahn

presspahn

9. What is the wound type current transformer?

secondary winding having more than one full turn wound on core

primary winding having more than one full turn wound on core

secondary winding having one full turn wound on core

primary winding having one full turn wound on core

10. How many commonly used shapes of current transformer are present?

11. What material is made use of for the lamination in the current transformer?

cold rolled steels

hot iron

hot rolled steels

copper

12. To reduce the peak voltage between layers, the secondary winding is being sectionalized.

false

true

13. How many types are the current transformers classified into?