Basler Electric BE1-700 - Manual (Page 71)

Figure 4-11. Time Overcurrent Protection Screen, 51 Tab
The default unit of measure for the Pickup setting is secondary amps. Primary amps (Pri Amps), per unit
amps (Per U Amps), and percent amps (% Amps) can also be selected as the pickup setting unit of
measure. The unit of measure for the Time setting that represents the element's time delay defaults to
milliseconds. It is also selectable for seconds, minutes, and cycles.
Beside the Logic pull-down menu is a pull-down menu labeled Settings. The Settings menu is used to
select the setting group that the element's settings apply to.
Table 4-9 summarizes the operating settings for Time Overcurrent Protection.
Table 4-9. Operating Settings for Time Overcurrent Protection
Setting
Range
Increment Unit of Measure Default
1 A 5 A
Pickup
0 = Disabled
0.1 to 3.2
0 = Disabled
0.5 to 16
0.02 for 0.1 to 9.99
0.1 for 10.0 to 16.0
Secondary Amps 0
Time Dial
0.0 to 9.9
0.0 to 99 (46 only)
0.1 N/A 0
Curve See Appendix A, Table A-1 N/A N/A V2
Retrieving Time Overcurrent Protection Status from the Relay
The status of each logic variable can be determined through the ASCII command interface using the RG-
STAT (report general-status) command. See Section 6, Reporting and Alarm Functions, General Status
Reporting, for more information. The status can also be determined using BESTCOMS Metering screen.
Programmable Curves
Time current characteristics for trip and reset programmable curves are defined by Equation 4-1 and
Equation 4-2 respectively. These equations comply with IEEE standard C37.112-1996. The curve specific
coefficients are defined for the standard curves as listed in Appendix A, Time Overcurrent Characteristic
Curves. When time current characteristic curve P is selected, the coefficients used in the equation are
those defined by the user. Definitions for these equations are provided in Table 4-10.
9376700990 Rev M BE1-700 Protection and Control 4-15