3. The three bus-bar conductors in an outdoor sub-station are supplied by units of post insulators. Each unit consists of a stack of 3-pin insulators fixed one on the top of the other. The voltage across the lowest insulator is 8-45 kV and that across the next is 7-25 kV. Find the bus-bar voltage of the station. [38-8 kV]

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3. The three bus-bar conductors in an outdoor sub-station are supplied by units of post insulators. Each unit
consists of a stack of 3-pin insulators fixed one on the top of the other. The voltage across the lowest
insulator is 8-45 kV and that across the next is 7-25 kV. Find the bus-bar voltage of the station.
[38-8 kV]
Transcribed Image Text:3. The three bus-bar conductors in an outdoor sub-station are supplied by units of post insulators. Each unit consists of a stack of 3-pin insulators fixed one on the top of the other. The voltage across the lowest insulator is 8-45 kV and that across the next is 7-25 kV. Find the bus-bar voltage of the station. [38-8 kV]
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