1.0 Scope
- This method statement details the method of installation of L.V main Panels (LVPs) according to the Specification Section 16402.
Note : A separate Method Statement ref. ETA/MS/E-29 shall be submitted for Testing & Commissioning.
2.0 Material
- All materials shall be as per approved material submittals, shop drawing and single line diagram.
- L.V. Main Panels.
- Cable glands and lugs.
- Identification labels and tags.
3.0 Applicable Location
- L.V. rooms for E1,E2,E3 & W1,W2,W3 Towers Located in Podium areas.
4.0 Method
- Storage
Note: L.V. Panels will be offered for factory inspection/witness by Design Consultant prior to material dispatch
- LVP’s shall be inspected upon receipt at site for damages and compliance with the approved submittals and Single line Diagram.
- Upon completion of receiving inspection, the LVP’s shall be positioned at the respective substation locations with suitable crane arrangements.
- LVPs found with transportation damages shall be recorded and notified to the concern party for further action.
- LVP’s shall be covered with polythene sheets to protect from dust and moisture.
4.2 Installation
- Ensure approved documents like shop drawing, SLD, electrical room layout and load schedules are available with the installation team.
- Check the label/marking to ensure that it is the right panel and check the position according to the shop drawing.
- Check the breaker rating and the provision for cable / bus bar termination.
- Set the breaker current rating as per approved shop drawing.
- Terminate the incoming and outgoing cable as per single line diagram using proper tools.
- Megger the panels after connecting the compartments.
- Megger the cables before terminating.
- Megger the panel after termination, when I/C open and O/G closed.
- Check working of motorized breakers.
- Clean the termination and breaker cubicles with vacuum cleaner and hand brush to clean the dust and small metal pieces fallen during cable cutting and terminating process.
- Ensure the busbars and interconnecting terminals are free from dust and damage.
- Provide identification for all the cable termination as per specification requirement and SLD.
- Dress the cables neatly with cable ties / cable cleat.
- Double check the connections by tightening the terminations.
- Keep the approved single line diagram near the LVP’s (photo framed), wall mounted inside the substation.
- Inspection shall be offered for QC Verification before DEWA inspection.
6.0 Records
6.1 QC Inspection Check List.
- Inspection request duly signed-off by NMX and Consultant.
7.0 Attachment
- Inspection Check List for L.V. Panels .