Transcription of 11 KV Substation.
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11 KV Substation.
1 11 KV Substation. Pole-Mounted Sub-Station: 1. It is a distribution sub-station placed overhead on a pole. It is the cheapest form of substation as it does not involve any building work. Fig (i) shows the layout of pole-mounted sub-station 2. Whereas Fig (ii) shows the schematic connections. The transformer and other equipment are mounted on H-type pole (or 4-pole structure). 3. The 11 kV line is connected to the transformer (11kV / 400 V) through gang isolator and fuses. 4. The lightning arresters are installed on the side to protect the sub-station from lightning strokes. 5. The transformer steps down the voltage to 400V, 3-phase, 4-wire supply. The voltage between any two lines is 400V whereas the voltage between any line and neutral is 230 V. 6. The oil circuit breaker ( ) installed on the side automatically isolates the transformer from the consumers in the event of any fault. 7. The pole-mounted sub-stations are generally used for transformer capacity up to *200 kVA.
3. The 11 kV line is connected to the transformer (11kV / 400 V) through gang isolator and fuses. 4. The lightning arresters are installed on the H.T. side to protect the sub-station from lightning strokes. 5. The transformer steps down the voltage to 400V, 3-phase, 4-wire supply. The voltage
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