The transformer oil is contained within the oil tank, and during assembly, the oil.resistant rubber components undergo pressurization and sealing procedures facilitatedby fasteners. The primary culprit behind oil leakage in oil-immersed transformers isinadequate sealing, necessitating heightened vigilance in their maintenance practices.Hence, particular emphasis should be placed on the upkeep of oil-immersedtransformers to ensure their optimal functioning.
Indeed, it's crucial to inspect the small bolts of the oil-immersed transformer post-vibration for any signs of loosening and to promptly tighten them if necessary. Thetightening process should be executed with precision and uniformity to ensure optimaperformance. Additionally, it's imperative to check the condition of the rubbercomponents within the transformer, looking out for any cracks, breaks, or significant deformations.
When replacing worn-out or damaged rubber parts with renewable ones, meticulousattention should be given to ensuring compatibility in terms of models andspecifications. This step is vital to maintaining the transformer's integrity andpreventing any potential leaks. Furthermore, maintaining a clean sealing surface on theoil-immersed transformer is equally important, as it promotes effective sealing andprolongs the lifespan of the rubber components.
Preventing oil-immersed transformers from moisture is crucial for their insulation andsafety. Ensure housing and seals are intact, use protective covers for outdoortransformers, and conduct regular inspections to identify and fix potential moisturesources. This will keep transformers operating reliably and safely.
In short, users should pay attention to the following measures:
1 Upon purchase, request handover testing from the power supply bureau & install adehumidifier immediately. Transformers >100kVA require moisture absorbers toprevent dampness. Monitor & replace wet silica gel promptly.
2 Order transformers with short storage time pre-transmission. Prolonged storageincreases moisture risk, Plan accordingly, especially for<100kVA transformers withoutmoisture absorbers. Oil in conservator can get damp, accumulate water, affectingtransformers stored >6mo or operational >lyr without power.
3 Before lifting, transporting, maintaining, or refueling oil-immersed transformers.drain dirty oil from the oil pillow, and wipe the transformer with a dry cloth.The sealingof the transformer serves to prevent dirty oil in the conservator from infiltrating into theoil tank of the oil-immersed transformer. Throughout the operation of oil-immersedtransformers, constant vigilance is imperative to monitor changes in oil level, oitemperature, voltage, and current. Any detected abnormalities should be promptlyanalyzed and addressed. Moreover, during the installation ofoil-immersed transformersthe strict prohibition against the use of aluminum stranded wires, aluminum busbars,and similar materials is enforced, This is due to the potential for electrochemicalcorrosion, also known as the "copper-aluminum transition" issue, that may arise whenaluminum comes into contact with copper components within the transformer.especially in the presence of moisture or electrolytes. This corrosion can lead to poorcontact, overheating, and even short circuits, ultimately jeopardizing the safe and stableoperation of the transformer. Thus, compatible copper or specialized alloy materialsshould be employed during installation.
Post time: Aug-09-2024