Switchgear Pre-commissioning

Switchgear pre-installation inspection

1. Pastikan equipment certificate meet area classification requirement


2. Remove temporary weather proofing, transport packing, and silica gel drying agent from switchgear, Cek cleanliness di dalam switchgear, specially for insulator


3. Compare switchgear equipment meets equipment schedule, specially rating and any circuit changes


4. Pastikan equipment meets spec, including weather, dust and vermin proofing

Switchgear post-installation inspection

1. Check switchboard assy for alignment, level, tighteness foundation bolts and fixing in general


2. Pastikan all panel doors and gland plate are bonded to switchboard structure


3. Pastikan all equipment installed in switch board are in good conditions


4. Inspect busbar joint


5. Pastikan all insulators are clean, free from damage and not subjected to undue mechanical stress


6. Cek all items corresponded to material list


7. Cek all damages items


8. Clearence phase to phase and phase to earth are acordance with spec


9. Section clearances are satisfactory


10. Earthing connection connected to all necessary points and clear of other metal


11. Earthing connection tight, greased and thinned as required. Inspect the switchboard earth bar and earth cable for electrical and mechanical continuity


12. Confirm all earth runs connected to main grid


13. Labels correct/fitted


14. Manufacturers name plate/marker correct/fitted


15. Serial numbers match manufacturers test certificates


16. Primary connection assembly /jointing compound, no undue stress/tension on equipment, fitting bolt correctly tensioned


17. No dissimilar metals employed on primary connections


18. No rust on equipment


19. Site surfacing is correct and satisfactory


20. All fixing bolts are tight


21. No leaking impregnation fluid or swelling of containers


22. Ensure all manufacturer's document and test certificate have been received


23. Operation of locking facilities


24. Cable entry arrangments


25. Ensure all equipments meet specification weather, dust and vermin proofing after installation


26. Examine fuses for rupturing or signs of deterioration

Switchborad testing

1. After all busbar joints are completed but prior to securely fitting busbar covers, measure insulation resistance of the busbars and control wiring.


2. Where there are any busbar joints, ductor test must be carried out prior to fitting covers. Simillar joints shall have a contact resistance within 10% of each other. The joints shall have a resistance equal or lower than an equivalent section of busbar


3. Test switch board earth system for electrical dan mechanical continuity. Measure earth path resistance at the earth bar to the general earth system and earth bar joints


4. Ensure that all protection relay have been tested accrdance with requirement of appropriate test certificate and vendor instruction


5. Measure insulation testing of busbar and control wiring. Test should be carrued out prior to pressure test and before energising switchboard. Minimum acceptabe test result as below. A Power frequency voltage test (pressure test) on both main and outgoing cicuits sall be carried out phases and phases to earth.

Following conection shall be adhered for the tests

1. All secondary sides of current transformers shall be short circuit
2. All secodary sides of voltage transformer shall be open circuit

upon completion all tests, reconnect all cables and ensure that shorting links and fuses are replace