Question
Download Solution PDFThe insulation strength of EHV lines is mainly governed by
This question was previously asked in
UKPSC JE Electrical 2013 Official Paper II (Held on 7 Nov 2015)
Answer (Detailed Solution Below)
Option 1 : Switching overvoltages
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UKPSC JE CE Full Test 1 (Paper I)
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Detailed Solution
Download Solution PDFThe correct answer is 'option 1'
Concept:
Switching over-voltages are the governing factor in the design of the EHV(Extra High Voltage) transmission lines.
Origins of switching over-voltages:
- Energisation of transmission lines and cables.
- Switching of high voltage reactors.
- Switching of transformers that are loaded by a reactor on tertiary winding.
- Fault initiation and clearing.
- Switching of a transformer at no load.
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