A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?
Correct answer: D. 5 + 0.9 kV mm
- A. 1 + 0.2 kVmm
- B. 2 + 0.5 kVmm
- C. 4 + 0.7 kV mm
- D. 5 + 0.9 kV mm
Explanation
The commonly used empirical expression for insulation thickness between LV and HV windings is approximately 5 + 0.9kV mm, with voltage expressed in kilovolts. It accounts for the increased insulation requirement as winding voltage rises.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Electrical Machines
1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrical Machines questions
For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?
The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are______________?
The high voltage winding is usually which of the following type ?
The surge phenomenon is particularly important in case of_______________?
The insulation between windings and grounded core and the insulation between the windings of the same phase is called__________________?
The laminations of the armature of a D.C. machine are usually ___________ thick?