Basler Electric BE1-851 - Manual (Page 314)

If you want to change the characteristic curve constants, select the Curve Coefficients and a dialog box
opens for those entries. See Figure 14-11.
Figure 14-11. Curve Coefficients Screen
Select the BESTlogic box at the bottom of the Phase (51P) panel. The status of the logic is shown above
the BESTlogic box. A dialog box (BESTlogic Function Element) opens showing the status of the element
logic and the logic scheme name. If you have a custom logic scheme active, you may change the status
of the element logic by pulling down the menu and selecting from the available choices. Set the 51N and
51Q properties in a likewise manner.
50T and 150T (Instantaneous Overcurrent)
BE1-851 relays have three instantaneous elements on the 50T tab and three instantaneous elements on
the 150T tab. These two tabs are almost identical to the 51 screens. See Figure 14-12 for the 50T tab;
the 150T screen is similar. The settable time delay is the primary difference. To change the time delay,
pull down the Time menu and select your preferred unit of measure (milliseconds, seconds, minutes, or
cycles) and then change the time for the appropriate phase, neutral or negative sequence element.
Figure 14-12. Time Overcurrent Screen, 50T Tab
14-10 BE1-851 BESTCOMS™ Software 9289900990 Rev R