Equation 14, N equation 14, G equation 14 – Basler Electric BE1-11t User Manual
Page 108: Nd equation 15
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The pickup settings in Times Tap can be related to primary amps by Equation 15. Minpu is the minimum
pickup setting in Times Tap. The definitions for the remaining variables in Equation 15 are the same as
those for Equation 13.
π =
ππ΄ππ
π
ππ΄ππ
π΄
=
πππ΄ Γ 1000 Γ πΆππππ
ππ΄ππ
π΄
Γ β3 Γ πΎππ Γ πΆππ π
Equation 14. Tap Adjustment Equation
πΌπππ =
πππππ’ Γ ππ΄ππ Γ πΆππ π
πΆππππ
Equation 15. Calculate Primary Amps
% of Maximum - The maximum of the compensated input currents is used. For example, the restraint
current for phase A would be
I
RA
= max (I
AXCOMPS
)
where x = 2 for two current inputs.
% of Average - The average of the compensated input currents is used. For example, the restraint
current for phase A would be given by Equation 16.
πΌ
π π΄
=
ππ’π ππ πΌ
π΄π₯πΆππππ
ππ’ππππ ππ πΌπππ’π‘π
Equation 16. Calculate Restraint Current for Phase A, % of Average
Phase current differential element operational settings are configured on the Phase Current Differential
(87) settings screen (Figure 63) in BESTCOMSPlus. A legend for the chart (Figure 64) is shown by
clicking the Help button on this screen. Setting ranges and defaults are summarized in Table 35.
Figure 63. Phase Current Differential Settings Screen
0BPhase Current Differential (87) Protection
BE1-11t