ABB Relion REC615 - Recloser Inverse-Time Characteristics

Figure 395: RD-type inverse-time characteristics
11.2.2 Recloser inverse-time characteristics
For inverse-time operation, standard recloser inverse-time characteristics are
supported.
The trip times for the curves are defined with the coefficients A, B, and C.
The values of the coefficients can be calculated according to the formula:
General function block features
1MRS758755 C
764 REC615 & RER615
Technical Manual