1. 380 kV line Metering CT was connected with BCU ( Bay control Unit) in GIS LCC.
2. The metering CT Ratio is 1500/1.
3. During SAS Pre commissioning measurement was checked like current injected 5% , 10% , 50%.
4. 5% Primary current 75 amps and REC 670 not read and current shows 0 in the display.
5. The secondary of 75 Amps is 0.05 amps which is not seance by REC 670 relay.
6. MW also shows zero because of current seances as 0.
7. REC 670 seance above 100 amps primary that means above 0.061 amps.
8. Client not accept this condition.
9. After long discusses the Relay setting was change as below and relay start to read from Zero current.
10. This setting was changed for Reactive and Active & Apparent Power
2. The metering CT Ratio is 1500/1.
3. During SAS Pre commissioning measurement was checked like current injected 5% , 10% , 50%.
4. 5% Primary current 75 amps and REC 670 not read and current shows 0 in the display.
5. The secondary of 75 Amps is 0.05 amps which is not seance by REC 670 relay.
6. MW also shows zero because of current seances as 0.
7. REC 670 seance above 100 amps primary that means above 0.061 amps.
8. Client not accept this condition.
9. After long discusses the Relay setting was change as below and relay start to read from Zero current.
10. This setting was changed for Reactive and Active & Apparent Power
