Basler Electric BE1-11m - Manual (Page 543)

9424200996 Rev L 531
Figure 358. 2 nd Slope Restrained Operation Example
Alarm
The BE1-11m provides a Slope % alarm for cases where high loads or through faults cause unbalance in
the differential. The Slope % Alarm is calculated in Equation 52.
𝑆𝑙𝑜𝑝𝑒 % 𝐴𝑙𝑎𝑟𝑚 = 1.5 ∙ 𝑅𝑒𝑠𝑡𝑟𝑎𝑖𝑛𝑡 𝑆𝑙𝑜𝑝𝑒 2 % = 1.5 ∙ 32% = 48%
Equation 52. 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 359.
User Programmable Alarm 3 is used for reporting a minor alarm, which indicates a large percentage
restraint imbalance during starting mode. Use the Settings Explorer to navigate to Alarm Configuration,
User Programmable Alarms, and name User Programmable Alarm 3 to “Differential Slope”. Navigate to
Alarm Configuration, Alarms, and enable Programmable Alarm 3 as a minor alarm. This alarm will show
up in the sequence of events and alarm reporting as “Differential Slope”.
Figure 359. Protection, Current, Current Differential (87) Screen
BE1-11m Settings Calculation Examples