FIELD: electrical engineering.
SUBSTANCE: method for determining the heating time constant of a dry transformer involves closing the low voltage winding to an ammeter, setting the current value of the low voltage winding to close to nominal, while simultaneously measuring this value, two additional measurements of the low voltage winding current at equal time intervals and the calculation of the heating time constant from the three measured values of the current and the interval between measurements.
EFFECT: possibility of determining the heating time constant of a dry transformer based on three simple measurements.
1 cl, 1 dwg
