Answer / shyam

this is the case of short transmission & it will have voltage less than 20 kv.even i marked 33 kv foolishly during exam.

Answer / madan mohan

Since transmission line length is less than 80 km so it is definitely short transmission line. Voltage rating for short transmission line is <20 kV. So choose accordingly.

L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

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