A detailed Air Cooled Transformer DAILY preventive maintenance checklists
Visual Inspection
- Inspect the ground area around the transformer.
- Look for any wet spots or discoloration.
- Check the transformer casing for oil residue.
- Ensure no pooling of liquid is present.
- Examine the entire exterior surface of the transformer.
- Look for flaking, bubbling, or discoloration of paint.
- Identify any areas with rust or corrosion.
- Note any locations requiring touch-up or repainting.
- Check all access points for proper closure.
- Inspect seals for signs of wear or damage.
- Verify the integrity of latches or locks.
- Ensure that no gaps are present.
- Examine the transformer for any visible dents.
- Check for cracks or deformities in the housing.
- Look for any signs of impact damage.
- Document any issues for repair.
- Inspect grounding connections for tightness.
- Look for corrosion or rust on grounding straps.
- Ensure that connections are secure and intact.
- Check for any exposed or damaged wiring.
- Clear any debris from around the transformer.
- Remove vegetation that may obstruct airflow.
- Ensure pathways are clear for maintenance access.
- Check for any hazards that may pose a risk.
- Inspect surfaces for dust accumulation.
- Check for dirt in crevices and cooling fins.
- Note any areas needing cleaning.
- Ensure surfaces are clean to maintain efficiency.
- Inspect ventilation openings for obstructions.
- Check cooling fins for dust and debris.
- Ensure airflow is not restricted.
- Document any blockages for further cleaning.
- Check for any missing or damaged labels.
- Ensure all labels are readable and attached.
- Inspect for peeling or fading of information.
- Replace any illegible or missing labels.
- Inspect all bolts and screws for tightness.
- Look for any visibly missing fasteners.
- Document any loose components for tightening.
- Ensure casing is secure to prevent vibration.
- Inspect cooling fans for cleanliness.
- Check for any signs of wear or damage.
- Ensure fans operate smoothly without noise.
- Test functionality to confirm operational status.
- Examine wiring for frays or cuts.
- Check insulation for signs of deterioration.
- Ensure conduits are intact and secured.
- Document any issues for repair or replacement.
- Inspect drainage areas for blockages.
- Check that water flows freely away from the transformer.
- Look for any signs of water pooling.
- Clear any debris that may obstruct drainage.
Cooling System
- Listen for fan operation sounds.
- Check for any unusual vibrations.
- Ensure fans are spinning at the correct RPM.
- Inspect electrical connections for integrity.
- Look for any overheating signs.
- Inspect the area for debris or equipment.
- Remove any obstacles blocking airflow.
- Ensure clearance around transformers is maintained.
- Check for dust accumulation on surfaces.
- Verify that air intake paths are clear.
- Remove filters and check for dirt buildup.
- Clean reusable filters with compressed air.
- Replace filters if heavily soiled or damaged.
- Ensure filters are correctly seated when reinstalled.
- Document filter condition in maintenance records.
- Look for rust or paint peeling on fins.
- Check for physical damage or bending.
- Clean fins to ensure optimal heat dissipation.
- Ensure there is no debris obstructing the fins.
- Record any findings for future reference.
- Visually inspect all vent openings.
- Remove any accumulated dust or blockages.
- Check duct connections for proper alignment.
- Ensure ducting is secure and intact.
- Document the condition of ducts and vents.
- Use a thermometer to measure inlet air temperature.
- Measure outlet air temperature similarly.
- Calculate the temperature differential.
- Ensure it meets operational specifications.
- Record results for monitoring trends.
- Verify that thermostats are set to correct values.
- Test sensors for accurate temperature readings.
- Check for response to temperature changes.
- Inspect wiring for any signs of wear.
- Document any discrepancies found during testing.
- Listen for any grinding or rattling noises.
- Check for a consistent operational sound.
- Inspect for loose components causing noise.
- Monitor fan operation for irregular patterns.
- Log any abnormal sounds for follow-up.
- Verify airflow direction with system design documents.
- Check for signs of reverse airflow.
- Ensure fans and vents are correctly oriented.
- Inspect airflow patterns visually or with smoke tests.
- Document any misalignments found.
- Inspect surrounding areas for coolant stains.
- Check fittings and hoses for tightness.
- Look for signs of moisture accumulation.
- Ensure spills are cleaned up to prevent hazards.
- Record any leaks or concerns in the log.
- Record all measurements and observations.
- Note any maintenance performed or parts replaced.
- Ensure logs are updated promptly after checks.
- Include date, time, and personnel involved.
- Review logs regularly for patterns or issues.
Electrical Connections
Temperature Monitoring
- Use a reliable thermometer to measure ambient temperature.
- Position the thermometer at a distance of 1 meter from the transformer.
- Ensure measurement is taken away from direct sunlight or heat sources.
- Note down the temperature in the maintenance log.
- Read the gauges clearly and record the current temperatures.
- Refer to the manufacturer's specifications for normal operating ranges.
- Identify any discrepancies between current readings and normal ranges.
- Document findings for further analysis.
- Test the alarm system by simulating high-temperature conditions.
- Check for audible alerts and visual indicators.
- Confirm that the shutdown mechanism activates as intended.
- Log the results of the verification process.
- Examine the physical condition of each sensor for damage.
- Ensure all connections are tight and free of corrosion.
- Check the alignment of sensors as per installation guidelines.
- Document any issues found and schedule repairs if necessary.
- Use calibration equipment to verify sensor accuracy.
- Adjust sensors according to manufacturer specifications if needed.
- Record calibration results in the maintenance log.
- Replace any sensors that fail the calibration test.
- Take readings at regular intervals throughout the day.
- Note operational changes that may affect temperatures.
- Analyze data for patterns or significant fluctuations.
- Prepare a summary report of findings.
- Measure the transformer temperature and cooling air temperature.
- Calculate the temperature differential for assessment.
- Compare results with acceptable differential ranges.
- Document findings for future reference.
- Take temperature readings before and after the cooling process.
- Assess the effectiveness of the cooling system.
- Identify any significant deviations in temperature.
- Log results and recommend maintenance if cooling is inadequate.
- Maintain a detailed log of daily temperature readings.
- Use software tools to analyze data for trends.
- Review logs regularly for any unusual patterns.
- Prepare reports for management review.
- Obtain the latest specifications from the manufacturer.
- Cross-reference current temperatures with allowable limits.
- Identify any compliance issues and document them.
- Take corrective actions if temperatures exceed limits.
- Inspect areas around air inlets and outlets for blockages.
- Clear any debris or obstructions found.
- Ensure proper airflow is maintained at all times.
- Document the condition of air passages.
- Inspect insulation for wear, damage, or moisture.
- Check for any gaps or exposed areas.
- Evaluate insulation performance based on temperature readings.
- Schedule repairs or replacement if necessary.
- Notify maintenance supervisor of any irregular readings.
- Document the abnormal conditions in the log.
- Follow up with corrective actions as per protocol.
- Ensure continuous monitoring until resolved.
Use in Manifestly