What is the Maintenance of Transformers ?

What is  the Maintenance of Transformers ?

Maintenance of transformers is essential to ensure their safe, stable and efficient operation, and the following are some common maintenance measures:

Periodic inspection

Appearance check: Check whether the transformer shell is damaged, deformed, and leaking oil.

Oil temperature check: Use an oil temperature gauge to measure the oil temperature and ensure that it is within the normal range.

Oil level check: Observe the oil level in the oil pillow. If the oil level is too low, the transformer oil should be added in time.

Sound check: Listen to the sound of the transformer when it is running. Normally, it should be a uniform humming sound. Abnormal sound may indicate a fault.

Cleaning and ventilation

Regularly clean the dust and dirt on the transformer shell and radiator to ensure good heat dissipation and ventilation.

Electrical test

The insulation resistance test is carried out regularly to check the insulation performance of the winding.Measure the DC resistance of the winding to determine whether there is a short circuit or open circuit in the winding.

Tap-changer maintenance

Check whether the tap changer is in good contact and operates flexibly.

Perform switching test and check on the tap-changer according to the specified period.

Gas relay inspection

Periodically check the gas relay for gas buildup.Test the operational reliability of the gas relay.

Dehumidifier maintenance

Check whether the moisture absorbent (usually silica gel) in the moisture absorbent is discolored, and if it is discolored, it should be replaced in time.

Cooling system maintenance

For air-cooled transformers, check whether the fan is operating normally and whether there is abnormal noise.For water-cooled transformers, check whether the water flow, pressure and temperature are normal.

Fastening part

Check whether the connection bolts and leads of the transformer are tight to prevent loosening.

Oil quality detection

Transformer oil is regularly extracted for testing to detect the breakdown voltage, acid value, water content and other indicators of the oil. If there is deterioration, it should be treated or replaced in time.

Recording and analysis

Establish maintenance records to record the contents, discovered problems, and solutions of each maintenance in detail.Operational data and maintenance records are analyzed to identify potential problems in advance and take preventive action.

Follow operating procedures

Before maintenance, ensure that the transformer is powered off and take reliable grounding measures by strictly following the relevant operation rules and safety regulations.

Emergency treatment plan

Develop emergency plans for possible transformer failures and emergencies to ensure that emergency situations can be handled quickly and effectively.