When comparing quotes for transformer oil, owners should look beyond the price per litre. Oil type and quality, availability, delivery times, logistics and required services are equally important. Five questions show what transformer owners should consider when reviewing a quote for transformer oil.
Not every transformer oil is available at all times and in the required quantity. Certain products can sometimes be difficult to source, while international supply chains and geopolitical developments can further affect availability. Transformer owners should therefore determine the required type of insulating oil at an early stage. The following points are relevant:
Market availability can also influence the choice of transformer oil. For example, transformers supplied from South America may specify an ASTM inhibited oil that is not readily available in the UK or Europe. In such cases, an alternative type oil to IEC 60296, may be considered. Similarly, where customers request European Specific Oil, which may not be readily available in the UK, an alternative could be considered.
However, an alternative oil should not simply be substituted on the basis of availability. Any change from the originally specified transformer oil must be approved by the transformer manufacturer.
The more precisely these requirements are defined at the enquiry stage, the more accurately the quote for transformer oil can be tailored to the specific requirements. In addition to oil type and quantity, another factor is crucial: the quality of the transformer oil.
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When considering a quote for transformer oil, it is not only important which oil is supplied, but also the quality it provides. Certain standards and specifications apply. For new mineral insulating oils, for example, IEC 60296 provides an important basis. Transformer manufacturers and operators may also define their own requirements.
Quality documentation and analysis data help determine whether the transformer oil offered meets the required properties. EOS® has compiled several blog articles on insulating oil analysis explaining which parameters are examined when analysing insulating oil and what they reveal about its quality.
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Depending on the application, very different services may be required when transformer oil is supplied – for example, when filling a new transformer, carrying out maintenance or servicing work, changing the oil or topping up transformer oil. An attractive price per litre therefore says little about the overall costs involved.
Before a quotation is prepared, the following questions should be clarified:
Only once these parameters have been established can quotations be compared meaningfully. The price per litre of transformer oil is therefore only one part of the overall cost. What matters is which services are actually required for the respective application and whether they are included in the quotation.
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Finding the right transformer oil in the required quantity is not enough – it must also be available at the right place at the right time. Delivery times and logistics should therefore be considered as early as possible when requesting a quote for transformer oil.
The following points are particularly important:
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Delivery and filling do not necessarily complete all the work required. Depending on the transformer, its condition and the reason for the work, additional services may be necessary. These should be considered when requesting a quote for transformer oil.
These may include:
The more precisely the required scope of services is defined in advance, the more meaningful the quote for transformer oil will be.
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A quote for transformer oil cannot be assessed solely on the price per litre. What matters is whether the type and quality of oil are suitable for the transformer, whether the required quantity is available at the right time and whether delivery and additional services are tailored to the respective application.
Defining these points as precisely as possible at the enquiry stage provides a better basis for comparing quotations – whether for filling a new transformer, maintenance or servicing work, an oil change or topping up.
Transformer oil and transformer oil management at Electrical Oil Services
EOS® supports transformer owners with a range of activities relating to insulating and transformer oils. If you would like to find out more about individual topics, our blog includes further articles on transformer filling, insulating oil analysis, oil treatment, recycling and recycled transformer oil.
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FAQs about quotes for transformer oilWhat information is required for a quote for transformer oil?The more precisely the requirements are described, the more accurately the quotation can be prepared. Useful information includes details about the transformer and required transformer oil, the quantity of oil, the site and preferred date, as well as required services such as filling, oil treatment or laboratory analysis. How early should a quote for transformer oil be requested?A quote for transformer oil should be requested as soon as the oil type, approximate quantity required and planned date are known. Depending on the availability of the transformer oil, the quantity required, the location and any additional services, a longer lead time may be necessary. Particularly where fixed maintenance, outage or commissioning dates apply, oil delivery and the required services should be planned well in advance. Can oil delivery, filling and additional services be requested together?Yes. In addition to the supply of transformer oil, a request can include services such as filling, oil treatment, sampling and laboratory analysis, as well as the collection of used oil. The services required will depend on the transformer and the respective application. |