| linear time-invariant transfer element the time derivative of the output variable of which is proportional to the corresponding value of the input variable|
Note 1 to entry: The transfer function of an I element is given as
|KI||is the integral action coefficient;|
|s||is the complex variable of the Laplace transform;|
|U(s)||is the input transform;|
|V(s)||is the output transform.|
Note 2 to entry: This entry was numbered 351-28-19 in IEC 60050-351:2006.