DEVICE TO ESTIMATE TRANSFORMER SERVICEABILITY PROCEEDING FROM TRANSFORMER RESIDUAL LIFE Russian patent published in 2009 - IPC H01F41/00 G01R31/06 

FIELD: instrument making.

SUBSTANCE: invention relates to instrumentation and can be used to forecast the transformer residual life, calculate reliability proceeding from residual life and determine time before transformer failure. The proposed device incorporates a measuring component, memory components, as well as data processing and display components. It works on the principle that proceeds from the dependence of transformer used-up life upon the temperature of most heated point, i.e. where R₀ is the transformer life used-up per unit time, at rated temperature of most heat point ϑ₀; R_i is the actual transformer life used-up per unit time, at temperature of most heat point ϑ_i, ϑ_i is the actual temperature of most heated point of the transformer; °C; Δϑ is the absolute departure of the most heated point temperature, °C; ϑ₀ is the rated temperature of the said point °C.

EFFECT: control over serviceability by continuous calculation of its used-up life, revealing time whereat transformer should be taken out of commission and transferred for repair to prevent emergent conditions.

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