Document M4zqaRgBKOQkEKQK9aD8BDgdV

THE DOW CHEMICAL COMPANY ELECTRICAL TECHNOLOGY GLOBAL ADMINISTRATIVE GUIDELINE G7A-0099-03 18-OCT-1995 PAGE 1 OF 4 CASE ELECTRICAL SAFETY AND RELIABILITY AUDIT CHECK LIST FOR POWER TRANSFORMERS TF TRANSFORMER LOCATION I.D. * TRANSFORMER EQUIPMENT I.D. # VOLTAGE kVA r~g- Tf slm/oq/ /OOP Yes No N/A 1. Is the transformer properly tagged? 2. Is the manufacturer nameplate in place and legible? 3. Is the transformer case free of any signs of corrosion? / // 4. Is the transformer case adequately painted? 5. Is the transformer case free of any oil leaks? (Look at case, bushings, radiators, and z valve.) 6. Are oil samples taken regularly? 7. Is the transformer adequately grcur. i? (Must have two leads if its capacity is _ XVA and above) 8. Has the transformers been checked for PC3's and properly labeled? 9. Are vehicle barricades located if needed? 10. If the transformer has open bushings, is there a fence surrounding the transformer? 11. Are there warning signs posted on the fence? 12. Is the fence grounded? 13. Is the transformer operating free of excessive noise and vibrations? y 14. Is the transformer operating below rated capacity? / _j/ THE DOW CHEMICAL COMPANY ELECTRICAL TECHNOLOGY GLOBAL ADMINISTRATIVE GUIDELINE G7A-0099-03 18-OCT-1995 PAGE 2 OF 4 15. Is the transformer located away from process piping? 16. If transformer is within 20 feet (6 meters) of building, is the building wall non-combustible? 17. Is there easy access for fire fighting? 18. Is the transformer bolted to foundation? 19. Is the transformer on a PPM program? 20. Is the transformer maintenance history being kept? / 21. Is high resistance ground system in place? 22. Is ground detector system on PPM schedule? / 23. Does transformer have a circuit breaker on the primary? (10,000 kVA and above) 24. Is short circuit protection available? / 25. Is protective device coordinated with other devices? 4/ 26. Is dissolved gas analysis data available? (1000 kVA and above) 27 . Is there a dike around the transfor contain an oil spill? zo 28 . Is there a pit with oil/water separation? 29. Is the pit protected with a fire barrier? _________ Case Index Score: _____ _ RADIATORS Yes No N/A 1 . Is the transformer radiator ee or any signs of corrosion? 2 . Is the transformer radiator adequately painted? _t/- 0 A 045 3 CNFrDTMNTTTTAAl/3 THE DOW CHEMICAL COMPANY ELECTRICAL TECHNOLOGY GLOBAL ADMINISTRATIVE GUIDELINE G7A-0099-03 18-OCT-1995 PAGE 3 OF 4 3. Is tile transformer radiator free of any oil leaks? (Look at case, bushings, radiators, and valve.) 4. Are the radiators removable with cut-off valves? (2000 kVA and above) 5. Are cooling fans operating properly? Radiators Index Score: INSTRUMENTS Yes No N/A 1. Is the oil level at an acceptable level? 2. Is the oil level gauge in good condition? 3. Is the tank pressure at an acceptable level? 4. Is the tank pressure gauge in good condition? 5. Is the 3uchholz Relay in good condition? 6. Is the Sudden Pressure Relay in good condition? (required for 10 MVA and above) 7. Is the Pressure Relief Valve (PRV) in good condition? 8. Is the transformer running at an acceptable temperature? (below 50 degree C rise above ambient) 9. Is the temperature switch and level switch wired to alarm in a continuously occupied location? [LPP 3.7.6] 10. Is the breather system in good condition? Instruments Index Score THE DOW CHEMICAL COMPANY ELECTRICAL TECHNOLOGY GLOBAL ADMINISTRATIVE GUIDELINE G7A-0099-03 18-OCT-1995 PAGE 4 OF 4 BUSHINGS 1. Are the exposed bushings clean? Yes * No N/A 2. Is the termination hardware on exposed bushing clean and without any signs of corrosion? 3. Are exposed bushings equipped with lightning protection devices? Bushings Index Score: /yA- CONDUIT/CABLE Yes No N/A I. Does cabling enter transformer from bottom or side only? 2. Is cabling or duct anchored to foundation? Conduit Index Score: ? TAP CHANGER Yes No N/A 1. Is the tap changer locked or bolted (and tagged)? Tap Changer Index Score: Power Transformer Average Index Score: DO A 045125 CONFIDFNTIAL.