www.fanox.com Rev. 07 34/1384.15. IEC60255-151 CurvesThe SIA-B relay complies with the curves shown in standard IEC60255-151:• Inverse Curve• Very Inverse Curve• Extremely Inverse Curve• Long time inverseThere is a general mathematical equation that defines the time in seconds as a function of the current:KDBQVDAt P ++−=adjustedIIV =Parameters A P Q B KLong Time Inverse 120 1 1 0 0Ext. Inverse 80 2 1 0 0Very Inverse 13,5 1 1 0 0Inverse 0,14 0,02 1 0 0The curve can mode from its axis using the D time selection device, which the user can adjust.Iadjusted is the initial operating current, set by the user.
