News

Transformer daily inspection is a crucial aspect of maintaining electrical equipment, ensuring safety, and preventing unexpected failures that could lead to power outages or equipment damage. The process typically involves visual checks and monitoring of key parameters to identify any irregularities or signs of impending issues. Below is a general checklist for conducting a daily inspection of transformers:

1. Visual Inspection:

• Check for any visible damage to the transformer's casing, bushings, or connections. Look for cracks, leaks, corrosion, or any signs of physical impact.

• Inspect the cooling system (if equipped) such as radiators, fans, and heat exchangers for blockages, damage, or debris accumulation.

• Ensure that all access points, covers, and vents are properly sealed and secured.

2. Oil Level and Condition:

• For oil-filled transformers, check the oil level indicator to ensure it's within the recommended range. Low oil levels can lead to overheating and insulation failure.

• Monitor the oil temperature and color. Dark or cloudy oil may indicate contamination or degradation, requiring further analysis.

3. Temperature and Load Monitoring:

• Verify that the transformer's operating temperature is within safe limits by checking thermal sensors or using infrared thermography.

• Monitor the load on the transformer to ensure it's not being overloaded beyond its designed capacity.

4. Noise and Vibration:

• Listen for any unusual sounds like humming, buzzing, or rattling noises which might indicate a problem with the core, windings, or cooling system.

• Observe for abnormal vibrations that could be a sign of mechanical imbalance or internal issues.

5. Ventilation and Clearance:

• Ensure that there is adequate clearance around the transformer to facilitate proper air circulation for cooling.

• Check that ventilation paths are clear and free from obstruction.

6. Control and Protection Systems:

• Verify that all control panels, alarms, and protection systems (including Buchholz relays, pressure release devices, and circuit breakers) are functioning correctly.

7. Record Keeping:

• Document all observations during the inspection, including date, time, readings, and any abnormalities found.

• Maintain an inspection logbook for future reference and trend analysis.

8. Environmental Conditions:

• Assess the surrounding environment for factors that could affect transformer performance, such as humidity, pollution, or vegetation growth near the unit.

It's important to note that the specifics of a daily inspection may vary depending on the type, size, and location of the transformer, as well as the manufacturer's recommendations and local regulations. Always refer to the transformer's operation and maintenance manual for detailed inspection guidelines.