data/1.json

{
  "case_id": "80",
  "motor_id": "<<A068>>",
  "area": "<<HSM>",
  "line": "<<Furnace Area>>",
  "rating_kw": 400,
  "log_book_entry_date": "2024-05-14",
  "failure_type": "<<Breakdown>>",
  "symptom_text": "<<High Bearing temperature.>>",
  "diagnostic_steps": [
    "Monitored bearing temperatures at DE and NDE using RTD.",
    "Monitored vibration severity at DE and NDE using vibration meter / physical assessment.",
    "Checked rotor free movement by manual rotation.",
    "Inspected coupling condition for seizure, wear, or damage.",
    "Verified motor-gearbox alignment condition.",
    "Checked foundation bolts and base plate tightness.",
    "Inspected bearing lubrication condition and grease contamination."
  ],
  "diagnostic_steps_rewards": [
    1,
    0,
    0,
    0,
    0,
    0,
    0
  ],
  "diagnostic_steps_costs": [
    5, 
    10, 
    5, 
    15, 
    45, 
    10, 
    15
  ],
  "observations": [
    "Overload relay found tripped at the time of breakdown.",
    "Incoming supply voltage and phase current were normal with no imbalance.",
    "Insulation resistance (IR) values were within acceptable limits, indicating no electrical fault.",
    "Normal vibration observed during motor operation.",
    "NDE bearing temperature was normal when checked using laser thermometer.",
    "Rotor free movement was ok.",
    "NDE Bearing fine."
  ],
  "root_cause": "Bearing seizure at NDE causing overload trip",
  "rectification": [
    "Replaced NDE bearing",
    "Cleaned and greased housings",
     "Checked alignment",
    "Performed no-load and load trials",
    "Reset motor overload relay",
    "Replace motor starter contactor",
    "Reprogram the VFD acceleration ramp time"
  ],
  "rectification_rewards": [
    1,
    1,
    1,
    1,
    0,
    0,
    0
  ],
  "rectification_costs":[
    120, 
    30, 
    60, 
    90, 
    10, 
    45, 
    15
  ],
  "verification": "Motor tested OK after repair",
  "reasoning": "<<Electrical causes eliminated as IR and supply were normal. Tight rotor and high bearing temperature indicated mechanical loading. Bearing replacement.>>",
  "failure_bucket": "Bearing Failure",
  "severity": " Medium",
  "repeat_failure": true
}