DGVCL Exam Paper (12-06-2016)
For a 66 kV line having span of 200 meters between towers the approximate sag will be 2 m. If the span is double the sag will be:
Transformer is static device. two or more stationary electrical circuit mutually linked by magnetic circuit. assumptions of ideal transformer: 1. there are no losses. 2. whole magnetic flux constant no leakage. 3. permeability of core is infinite.
EXAMIANS