Distribution RMU

Ring Main Unit used as a junction to provided reliable supply for Station Transformer. SST connected with two different incomer supplies. One is coming from out side distribution supply and other one is coming from station distribution 13.8 kV feeder through RMU.



At the same time Station distribution supply can take for out side distribution through RMU.

RMU 

Relay Setting 

CT connections

Back side cable cover interlock with Earth Switch

RMU -2 

380/230/115/13.8 kV Sub Station Energized

Doha BSP 380/230/115/13.8 kV Sub Station Energized  on 23.06.2016 successfully.  I really appreciate all Engineering and technicians who's hardly working for achieve the target.

The points should consider before Energization 

1. Checks the all transformer and Air busing for temporary earthing.

2. Rack in all MCAG and MFAG relays

3. Close all FTs in the protection panels 

4. Check all CB trip circuit supervision relays 

5. Check all alrams in the SAS monitor and clear unwanted

6. Take 10 copies of Single line diagram.

7. Check all Secondary VT TBs in LCC and VT MCBs in VT Terminal BOX.

8. Check all CT connections in Metrosil & Resistor

9. Check operation off all equipments ( CB, DS ES , RTCC) final kept all equipment in open condition and put LOCAL/REMOTE switch in REMOTE position.

10. The BB block alarm will appear if CB in test position.

11. Keep all Transformer in lower TAP position ( Lowest voltage)

12. All Surge arrestor shorting link in open position

13. Some times Line Zone -2 time setting will be instantaneous ( If recommended)

14. Check Syn function in all LL-LB  LL-DB DL - DB combination ( If possible)

15. Check the Gas levels in Gas monitor and keep GIS gas cylinder and filling machine for back up

16. Open all panels and check IN/OUT switch , open wires, CT VT TBs , all wires should away from the Panel Heater and temporary shorting.

17. Conform the availability of Phase Sequence meter and Multi meter with length leads , and clam meter.

18. Conform Temporary  Final setting for Spare bays ( Stub or Over current )

19. Keep all ACDCs in Auto mode .

SEIMENS Ethernet switch

We are used RUGGEDCOM RSG2100NC  SEIMENS  Ethernet switch was used for SAS net work.

There are two Power supply unit in the switch.

Due to Over Temperature or DC fluctuating or some other reason  one unit was fail nearly 15 nos.

The power unit was changed in the site.

Power Module 

                                  



                                

Extra port added in the switch

RJ 45 SHIELDED CABLE CAT 6

The CAT 6 shielded cables are used for Substation communication.

RED 670 INPUT CARD REPLACE

1.Switch off the DC 

2. Remove the plugs and CT & VT wires

3. Remove the screws with suitable driver 

4. Remove the cover 

5. Dismantle Input cord carefully 

6. Check the version of the card

7. Reassemble the relay and check the card availability in the Hard ware menu