There are four main steps to follow to retrofill transformers with ester fluids: Set up retrofilling plant; Reduce mineral oil content as much as possible; Fill again using new ester fluid; Test and nameplate.
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There are a range of MIDEL fluids to suit all types of transformer preservation systems. For breathing transformers, we recommend the use of MIDEL 7131 which is oxygen stable and suitable for continuous contact with air. For non-breathing transformers either MIDEL 7131 or MIDEL eN 1204 can be used.
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As a rule, components and materials used in mineral oil transformers are also compatible with MIDEL fluids. In all cases the user should confirm the suitability of any material to be used in equipment with MIDEL ester-based fluids.
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As a rule, components and materials used in mineral oil transformers are also compatible with MIDEL fluids. In all cases the user should confirm the suitability of any material to be used in equipment with MIDEL ester-based fluids.
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We get lots of questions on Ester Fluids… Especially when it comes to retrofilling transformers. That’s why we’ve put this guide together on the top 15 questions (and answers) – to help organisations better understand the challenges and possibilities of retrofilling with ester and to assist them to make investment decisions with greater certainty.
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TOAN - Transformer Oil Analysis and Notification - is the first entirely new DGA diagnostic tool to emerge in recent years. It allows the user to move away from alarming on DGA gas levels or rate of change and towards alarming only when an actual fault is developing. Automatically creates ACTIONABLE INFORMATION from large volumes of data Notifies the users only when a fault is present, thereby filtering out FALSE ALARMS Uses DATA MINING techniques to let the data tell you the trends.
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In environments where harsh conditions abound, maintenance of corroded equipment is a costly concern. Often the weakest points in a system – the joints – are most at risk due to corrosion of the metal fasteners used.
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