THE PROCEDURE OF MODIFICATION OF BUSBARS ON MDB1 & MDB2 AT MDB ROOM – NGV. AREA
Subject: Modification Busbars for MDB1 & MDB2 in MDB Room at NGV. Station
The procedure of Modification Busbars for MDB1 & MDB2 . The Mata shall be classification in 4 Step as below.
Step 1: Before shut down power supply.
1. Visual check for marking phase on each cables of the incoming line at Main Circuit Breaker in MDB1&MDB2.
2. Prepare Copper Busbars and Holders for modify work.
3. Prepare man crew and tools to waiting modify, then request to authorized ‘PTT for turn off load (All CBs).
4. After turn off load ready so confirm to PEA’ authorized for pull down Drop out.
5. Make sure to meet no power supply, after that to start step 2.
Step 2: Modification Busbars for MDB1 & MDB2.
6. Remove Existing Main Busbars and marking phase on each cables.
7. Measuring dimension for modify of busbars and fixing busbars holder.
8. After fixing new main busbars.
9. Back connect cables to new main busbars and meet to phase sequence also.
10. Tightening bolts torque of Busbars and cable connect with marking Torque.
Step 3: Safety check inside MDB1 and MDB2 before turn on power supply.
11. By contact, busbars and holder must be strong fixed on a part of Cubicle of MDB1 & MDB2.
12. By seeing, all bolt must be marking torque position.
13. By seeing, no any matter on Busbars and Circuit Breaker in MDB1& MDB2.
14. Clean dirty dust on MDB1& MDB2 and around area.
Step 4: Turn on Incoming to Load
15. Confirm the authorized ‘PTT to modify complete and request to PEA for energize Power supply .
16. After PEA energized Power, then PTT shall be turn on Main Circuit Breaker to receiving supply to load.
17. Checking the Voltage Level to meet normal level.