WORK OF SUB STATION OPERATOR

SUB STATION ATTENDANT / SUB STATION OPERATOR WORK:

After joining duty:

1.Mark the attendance in log sheet.

Log sheet

2.Check the substation yard (NCT, CT, PT ,ISOLATOR ETC).

3.Check the DC battery charger is in ON condition.

Battery Charger Panel

4.Check DC of C&R panel for trip (protection) circuit healthy.

Indication lamps of circuit breaker

5.Check DC of Circuit breaker for trip (protection) circuit healthy.

Trip circuit healthy push button

6.Check the HT side panel voltage.The voltage variation on this meter should be +_10% (up to 220 KV).

Digital voltmeter HT side

7.Check the 11kV incomer side voltage.The voltage variation on incomer side should be in the range of +_10%.

Digital voltmeter LT side

8.Check the power factor.The range of power factor should be in between 0.95 to 1.

Digital power factor meter

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9.Check the frequency of the supply.The variation in frequency should be +_3%.

Frequency indicator

10.Check the SF6 gas pressure.The SF6 gass pressure range should be 5.5 to 8.

SF6 Gas pressure indicator

11.Note the load of outgoing feeder in log sheet after the interval of 1 hour.

12.Check the transformer oil and winding temperature after the interval of 1 hour and note it in the log sheet.

Oil and Winding temperature indicator

13.Check the OLTC panel and tap position of transformer.

14.Check the battery room temperature and gravity and voltage of cells, the value of gravity of cell should be in the range that is shown in image.

DC batter gravity chart

15.Check the message book.

16.Check the permit book.

17. Issue permit on feeder to authorized person. 

18.Check the schedule timing of feeders and also record the data of tripping and breakdown.

19.Record the data of daily energy consumption (KWH reading).

20.At night inspect the yard and note the hot point of equipment if present in yard.

21.Attend the phone call of senior officer and power controller(P/C).

22.Check the cleanliness of substation.