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sf6 Load break switch transformer maintenance End of Life Services rental

Field drying of transformer insulation | T&D Guardian ... estimated life of a transformer is calculated to be approx. 20.5 years (per IEEE C.57.91) minimum when operated as follows: 100% of rated load continuously. 110°C insulation temperature (65 rise + 15 hottest spot + 30 ambient) Moisture content in insulation regulated to approximately 0.5% over life.

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