What are the requirements when retrofilling transformers with Midel fluids?
ANSWER: There are four main steps to follow to retrofill transformers with ester fluids, as follows: 1. Set up retrofilling plant Follow ...
Will there will be any transformer de-rating by changing from mineral oil to an ester fluid?
ANSWER: Distribution transformers: unlikely Power transformers: an assessment may be required Transformer rating after retrofilling with ...
How do you process and handle used transformer ester fluids?
ANSWER: Depending on their condition, Midel fluids can be reprocessed and reclaimed using similar equipment and methods to mineral oil. ...
Is interfacial tension a meaningful property for MIDEL fluids?
ANSWER: Interfacial Tension (IFT) is routinely used as an indicator of polar contaminants in mineral oil and can be directly related to oil ...
Are Midel fluids compatible with all transformer materials?
ANSWER: As a rule, components and materials used in mineral oil transformers are also compatible with MIDEL fluids. Midel Compatible ...
What is the Power Factor of MIDEL ester fluids?
ANSWER: Power factor is the ratio of resistance current to capacitance current in an insulation system. In new mineral oil transformers ...
If Midel ester fluids have high acid levels, how do I recondition my fluid?
ANSWER: Mineral oil: aging by-products are short chain acids, water soluble can catalyse paper degradation. MIDEL fluids: aging by-products ...
What happens to the performance of Midel fluids when they absorb moisture?
ANSWER: Ester fluids can absorb large amounts of moisture with no reduction of breakdown voltage. They have a higher saturation point – and ...
How do Midel ester transformers fluids perform in the cold?
ANSWER: There are a range of MIDEL fluids to suit various climatic conditions. The performance of each fluid under cold climate conditions ...
Which dielectric fluids classifications are important to understanding fire safety?
ANSWER: IEC 61039 identifies “less flammable fluids” as those with a fire point >300°C. These are designated as K class fluids. ...