Basler BE1-11m, Instruction Manual

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9424200996 84-43
BE1-11 m Settings Calculation Examples
2 𝑠𝑠𝐿𝐿 𝑆𝑆𝐹𝐹𝐿𝐿𝐴𝐴𝑠𝑠 𝑃𝑃𝑅𝑅𝑠𝑠𝑘𝑘𝐹𝐹𝐴𝐴 𝐶𝐶𝐹𝐹𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑅𝑅 = 𝐹𝐹𝐿𝐿𝐴𝐴 ∙
1
𝐶𝐶𝐶𝐶𝑅𝑅 ∙
2 = 205 ∙
1
60
∙ 2 = 6.83 𝐴𝐴
2 𝑠𝑠𝐿𝐿 𝑆𝑆𝐹𝐹𝐿𝐿𝐴𝐴𝑠𝑠 𝑃𝑃𝑅𝑅𝑠𝑠𝑘𝑘𝐹𝐹𝐴𝐴 𝑆𝑆𝑠𝑠𝑅𝑅𝑅𝑅𝑅𝑅𝑠𝑠𝑉𝑉 =
6.83
2.0 = 3.42
𝐴𝐴
Equation 84-36. 2 nd Slope (Starting) Pickup Setting
Figure 84-55 shows an example of 2
nd
Slope Restrained Operation.
Figure 84-55. 2 nd Slope Restrained Operation Example
Based upon good engineering practices during starting mode to overcome dc offset and CT mismatches,
set Restraint Slope 2 % at 1.7 times the running mode slope and add a 25 percent margin. Restraint
Slope 2 % is calculated using Equation 84-37.
𝑅𝑅𝑠𝑠𝐴𝐴𝑅𝑅𝑠𝑠𝐿𝐿𝑅𝑅𝑠𝑠𝑅𝑅 𝑆𝑆𝐹𝐹𝐿𝐿𝐴𝐴𝑠𝑠 2 % = 𝑅𝑅𝐶𝐶 𝑂𝑂𝑆𝑆𝑆𝑆𝐴𝐴𝑠𝑠𝑅𝑅 ∙ 25% 𝑀𝑀𝐿𝐿𝑠𝑠𝑉𝑉𝑅𝑅𝑠𝑠 ∙ 𝑅𝑅𝑠𝑠𝐴𝐴𝑅𝑅𝑠𝑠𝐿𝐿𝑅𝑅𝑠𝑠𝑅𝑅 𝑀𝑀𝐿𝐿𝐿𝐿𝑠𝑠 1 % = 1.7 ∙ 1.25 ∙ 0.15% = 32%
Equation 84-37. Restraint Slope 2 %
Set the 2 nd Slope Pickup (starting) at 3.42 and the Restraint Slope 2% at 32.
Alarm
The BE1-11
m
provides a Slope % alarm for cases where high loads or through faults cause unbalance in
the differential. The Slope % Alarm is calculated in Equation 84-38.
𝑆𝑆𝐹𝐹𝐿𝐿𝐴𝐴𝑠𝑠 % 𝐴𝐴𝐹𝐹𝐿𝐿𝑠𝑠𝐴𝐴 = 1.5 ∙ 𝑅𝑅𝑠𝑠𝐴𝐴𝑅𝑅𝑠𝑠𝐿𝐿𝑅𝑅𝑠𝑠𝑅𝑅 𝑆𝑆𝐹𝐹𝐿𝐿𝐴𝐴𝑠𝑠 2 % = 1.5 ∙ 32% = 48%
Equation 84-38. Slope % Alarm
The setting range for Slope % Alarm is 50 to 100 in increments of 1, so a Slope % Alarm of 50% is used
for this example.
The Current Differential (87) screen is shown in Figure 84-56.