9328900990 Rev L BE1-951 Protection and Control 4-31
Figure 4-24. Power Protection (Directional Power) Screen
At the top of the screen is a pull-down menu labeled Logic. This menu allows viewing of the BESTlogic
settings for each preprogrammed logic scheme. A custom logic scheme must
be created and selected in
the Logic pull-down menu at the top of the screen before BESTlogic settings can be changed. See
Section 7, BESTlogic Programmable Logic. To the right of the Logic pull-down menu is a pull-down menu
labeled Settings. The Settings menu is used to select the setting group that the elements settings apply
to.
The default unit of measure for the Pickup setting is secondary 3-phase watts (Sec. 3∅ Watts). Primary 3-
phase watts (Pri 3∅ Watts), per unit 3-phase watts (Per U 3∅ Watts), and percent 3-phase watts (% 3∅
Watts) 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.
Using the pull-down menus and buttons, make the application appropriate settings to the directional
power element.
Table 4-17 summarizes the operating settings for Directional Power.
Table 4-17. Operating Settings for Directional Power
Setting Range Increment
Unit of
Measure
Default
Pickup
0 = Disabled
1 – 6000 5 A CTs
1 - 1200 1 A CTs
0.1 for 1 to 100
1 for 100 to 6000/1200
Secondary
Watts
0
0 to 999 milliseconds 1 Milliseconds
0.1 for 0.1 to 9.9 Seconds
0.0 to 600 seconds
1.0 for 10 to 600 Seconds
3 to 36,000 cycles (60 Hz)
Time
2.5 to 30,000 cycles (50 Hz)
∗
Cycles
0
Direction
F = Forward
R = Reverse
N/A N/A R
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