The document discusses condition monitoring techniques used in thermal power plants. The objective of condition monitoring is to identify potential failures in machines to avoid damages, downtime and safety issues. Key techniques discussed include vibration analysis, lubricant analysis, noise analysis, wear debris analysis, thermography and dissolved gas analysis. Specific diagnostics are provided for issues like unbalance, bearing damage and gear faults. Monitoring schedules are outlined for critical equipment like pumps, fans, transformers and more. Standards for condition monitoring are also listed.

1. CONDITION MONITORING IN THERMAL POWER PLANT SHIVAJI CHOUDHURY

6. VIBRATION ANALYSIS 8 MANY REF MARK USUALLY LOW GEAR NOISE RPM* GEAR TEETH 7 MANY REF MARK ERRATIC BAD BRG MANY *RPM 6 USE STOBE LIGHT TO FREEZE FAULTY BELT 1,2,3,4 UNSTEADY ERRATIC BAD DRIVE BELT 1,2,3,4*RPM 5 USE DIAL INDICATOR FOR POSITIVE DIAGNOSIS TWO MARKS LARGE IN AXIAL DIRECTION BENT,SHAFT MISALIGNMENT 2*RPM 4 USUALLY HIGH IN VERTICAL DIRECTION TWO MARKS ERRATIC LOOSENESS 2*RPM 3 SINGLE PRORRTIONAL IMBALANCE UNBALANCE 1*RPM 2 HIGH SPEED MACHINES WHERE PRESSURISED BEARING ARE USED ERRATIC OFTEN VERY SEVERE OIL WHIP OR OIL WHRIL ½ ROTIONAL SPEED 1 COMMENTS PHASE AMPLITUTE CAUSE FREQ S.N

13. VIBRATION MEASUREMENT MONTHLY SCHEDULE FOR CRITICAL EQUIPMENTS Y OTHER PUMPS/FANS 9 Y CW PUMPS 8 Y CEP 7 Y BFP 6 Y Y SEAL AIR FANS 5 Y Y MILL GEAR BOX 4 Y Y PA FANS 3 Y FD FANS 2 Y ID FANS 1 4 TH WEEK 3 RD WEEK 2 ND WEEK 1 ST WEEK Equipment S N

14. OIL ANALYSIS MONTHLY SCHEDULE FOR CRITICAL EQUIPMENTS 5 Y BFP LUB OIL 4 Y MILL LUB OIL 3 Y ID FAN LUB OIL 2 Y Y Y Y MOT OIL 1 4 TH WEEK 3 RD WEEK 2 ND WEEK 1 ST WEEK EQUIPMENTS S N

15. DISSOLVED GAS ANALYSIS YEARLY SCHEDULE FOR CRITICAL TRANSFORMERS Y STATION AND OTHER TRANSFORMER 3 Y UNIT AUX TRANSFORMER 2 Y GENERATOR TRANSFORMER 1 YEARLY SIX MONTHLY EQUIPMENT S.N

16. HOT SPOT SURVEY THROUGH THERMOVISION CAMARA Y SWITCH YARD AND TRANSFORMER YARD OF STATION 1 SIX MONTHLY EQUIPMENT S.N

18. WEAR DEBRIS ANALYSIS Y MILL GEAR BOX OIL 2 Y MOT OIL 1 ANNUALLY ONCE IN FOUR MONTH EQUIPMENT S.N

19. STANDARDS FOR CONDITIONAL MONITORING CONDITION MONITORING AND DIAGNOSTICS OF MACHINE AND PROGNOSTICS ISO 13381 3 MECHANICAL VIBRATION AND SHOCK –VIBRATION MONITORING OF MACHINE ISO 13373 2 CONDITION MONITORING AND DIAGNOSTICS OF MACHINES ,GENERAL GUIDELINE ISO 17359 1 DESCRIPTION STANDARD NO S.N

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