How should transformers with silicone liquid be tested according to industry standards?

Transformers filled with silicone liquid should indeed be tested with a power factor test according to industry standards. This method is crucial for determining the insulation condition of the transformer. The power factor test measures the ratio of real power to apparent power in the insulation system. It helps identify possible issues such as moisture ingress or deterioration of the insulation material over time, which is critical for maintaining the reliability and efficiency of the transformer.

Conducting this test helps in assessing the dielectric strength of the silicone fluid and ensuring that it is functioning properly under operational conditions. The power factor, typically expressed as a percentage, provides significant insight into the health of the insulation; higher power factor values may indicate insulation degradation and necessitate further investigation or maintenance.

The other methods listed may play roles in overall evaluation or maintenance of transformers but do not provide the same direct insights into insulation integrity. Temperature simulations generally analyze thermal performance under various loading conditions rather than insulation integrity. Acoustic testing focuses on noise generated by transformer components, which does not replace the need for a power factor assessment. Visual inspection is a basic maintenance procedure but does not substitute for electrical testing needed for quantitative analysis of insulation effectiveness.