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English to Russian translations [PRO] Tech/Engineering / Directional Overcurrent Relays
English term or phrase:Thermal state
In simplified terms the **thermal state** is a percentage thermal current limit that has been attained by the thermal replica.
The thermal state = (I*2)[1-e*(-t/T)]/([Ith]*2) x 100 = %Ith (здесь и далее * - возведение в степень; х - умножение)
Final value of thermal state = 100%х([highest thermal ammeter reading]*2)/([continuous thermal current limit]*2)
The thermal state will tend to 100% when the highest of the three thermal ammeters is displaying a current equal to the set thermal current limit (Ith>).
The time to reach 100% will depend upon:
Thermal time constant
Continuous thermal rating