Vacuum System Faults

• Low Vacuum Degree:
  • Causes: Vacuum pump malfunction, vacuum pipe leakage, insufficient or water - contaminated vacuum pump oil, excessive water vapor in extracted gas, faulty vacuum gauge.
  • Solutions: Repair or maintain the vacuum pump as per its manual; check vacuum pipes' seal and fix or replace leaking parts; top up vacuum pump oil to the oil level indicator; replace contaminated oil; if water vapor in extracted gas is normal, extend extraction time; calibrate or replace the vacuum gauge.
• Oil Entry into Vacuum Pump:
  • Causes: High oil level in vacuum tank, oil enters the cooler and then the vacuum pump; excessively high vacuum degree makes oil inflow exceed outflow.
  • Solutions: Control oil inflow to keep the oil level in the vacuum tank at the midpoint of the level gauge; adjust vacuum degree and balance oil inflow and outflow; if oil has entered the vacuum pump, drain it, clean the pump, replace the oil, and restart.
• Water Entry into Vacuum Pump:
  • Causes: Too much water in the cooler; excessive moisture in the oil being processed, with uncondensed water vapor entering the vacuum pump.
  • Solutions: Monitor the level gauge on the cooler and drain water in time; clean the vacuum pump and replace the oil if water enters.

Filtration System Faults

• Insufficient Oil Inflow:
  • Causes: Clogged inlet filter, low vacuum degree.
  • Solutions: Back - flush the inlet filter to remove blockages; refer to the above methods to boost vacuum degree.
• Reduced Oil Outflow:
  • Causes: Low oil level in vacuum tank, high vacuum degree, high oil tank or oil can position, air - leaky gear pump oil seal.
  • Solutions: Increase oil inflow to raise the oil level in the vacuum tank; lower vacuum degree; adjust the height of the oil tank or can; replace the gear pump oil seal.
• Reduced Oil Outflow and High Pressure Gauge Reading:
  • Causes: Clogged pre - filter or fine filter, high oil discharge position.
  • Solutions: Clean or replace the clogged filter elements; lower the oil discharge position.
• Unqualified Filtered Oil:
  • Causes: High oil moisture content, insufficient oil heating, damaged filter mesh, unclean equipment reused, low vacuum degree.
  • Solutions: Re - filter to reduce moisture; raise heating temperature; inspect and replace the filter mesh; thoroughly clean the equipment before reuse; increase vacuum degree if necessary.

Heating System Faults

• No Oil Temperature Rise After Heater Activation:
  • Causes: Dislodged temperature probe, faulty heating contactor, broken circuit, burnt - out heating tube.
  • Solutions: Secure the temperature probe; repair or replace the heating contactor; fix the circuit; replace the heating tube.

Motor and Electrical Faults

• Vacuum Pump - Motor Stops Mid - Operation:
  • Causes: Excessive voltage, power phase missing.
  • Solutions: Pause use until voltage normalizes; check power lines and fix phase - missing issues.
• Excessive Vibration or Noise:
  • Causes: Unstable equipment placement, severely worn impeller sleeve, overly worn motor bearings.
  • Solutions: Stabilize the equipment; replace the impeller sleeve; change motor bearings.

Other Notes

• Conduct regular comprehensive inspections and maintenance of the transformer oil filtering machine, including cleaning the surface, checking connections, and lubricating moving parts to cut down fault frequency.
• Strictly follow operational procedures to avoid faults caused by improper operation.
• If serious faults occur or self - repair fails, contact the manufacturer or a professional repair service promptly for safe operation and effective filtering.

In Conclusion

Transformer oil filtering machines are essential for maintaining the quality of transformer oil and ensuring the reliable operation of transformers. By understanding the common faults in the vacuum, filtration, heating, and motor and electrical systems, and implementing appropriate solutions, operators can enhance the machine's performance and longevity. Regular maintenance, timely repairs, and proper operational procedures are crucial in preventing and resolving faults, ultimately contributing to the safe and efficient functioning of transformer oil filtering machines in power system applications.