Why Is It Necessary to Regularly Inspect and Maintain Transformers?

1、 Extending equipment lifespan and preventing malfunctions

Regular maintenance can effectively detect aging, wear, or deterioration issues of internal components of transformers (such as insulation oil deterioration, coil short circuits, etc.), and timely handling can prevent small faults from escalating into major accidents. According to research by the Electric Power Research Institute (EPRI) in the United States, proper maintenance can extend the average lifespan of transformers by over 30%. For example, by cleaning insulation components and detecting oil quality, carbonization or breakdown of insulation materials can be delayed, avoiding equipment damage caused by partial discharge or overheating. In addition, regular calibration of operating parameters (such as voltage and current) can reduce equipment overload operation and decrease lifespan loss caused by long-term overheating.

2、 Ensure the safety and stability of the power system

Transformer faults may cause serious accidents such as fires and explosions, posing a threat to personnel safety and power grid stability. For example, deterioration of insulation oil or poor heat dissipation can cause a sudden temperature rise, igniting the oil body; Damaged casing or poor grounding may cause discharge accidents. Regular maintenance reduces risks through the following measures:

Testing insulation performance: monitoring indicators such as furfural content and insulation resistance in oil to ensure the effectiveness of the insulation system;

Maintain the cooling system: clean the radiator, check the operation of the fan, and prevent overheating caused by poor heat dissipation;

Identify leaks and mechanical hazards: Check the sealing of the fuel tank and the integrity of the casing to prevent oil leakage or foreign object intrusion.

3、 Improve energy efficiency and reduce operating costs

Maintenance can optimize the operation status of transformers and reduce energy loss. For example:

Reduce magnetic leakage and eddy current losses: By calibrating the grounding status of the iron core and tightening bolts, unnecessary energy consumption can be reduced;

Improve cooling efficiency: Clean up dust clogged heat dissipation channels, improve heat dissipation efficiency, and indirectly reduce load losses;

The economy of preventive maintenance: Compared to the high repair costs after a malfunction, regular maintenance costs are lower. According to statistics, preventive maintenance can reduce downtime losses caused by sudden failures by over 60%.

4、 Meet regulatory and technical standards requirements

Each country has strict requirements for the safety standards of power equipment, such as insulation strength and grounding resistance. Regular maintenance can ensure that transformers meet the following standards:

Safety certification: such as oil withstand voltage test, partial discharge test, etc., need to be conducted regularly to comply with GB, DL/T and other standards;

Environmental compliance: Monitor oil spills to avoid contaminating soil or water sources;

Operation record archiving: Maintain data (such as infrared temperature measurement records, winding deformation tests) to provide a basis for accident tracing.

5、 Adapt to complex operating environments and load changes

Modern power grids experience severe load fluctuations, and transformers often face challenges such as overload and harmonics. Regular maintenance enhances adaptability through the following methods:

Dynamic monitoring of load rate: Control the load current within the range of 75% -85% of the rated value, balancing efficiency and safety;

Dealing with extreme weather: Check the casing discharge and grounding system after strong winds and thunderstorms to prevent faults caused by environmental factors;

Technical upgrade support: Combining new technologies such as infrared imaging and ultrasonic partial discharge detection to improve the accuracy of hazard identification.

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