9424200996 65-3
BE1-11m Inverse Overcurrent (51) Test
Step 2: Prepare to monitor the 51-1 timings. Timing accuracy is verified by measuring the elapsed time
between a sensing current change and OUT1 closing.
Step 3: Connect a current source to BE1-11m terminals D1 and D2 (A-phase).
Step 4: Using the values listed in Table 65-4, apply the appropriate current values, and measure the
time between the application of current and the closure of OUT1. Record the results.
Step 5: Repeat step 4 for all of the current and time dial settings for your current sensing type.
Step 6: (Optional.) Repeat steps 1 through 5 for the B-phase and C-phase current inputs. Note: Be sure
to enable proper target for each phase being tested.
Step 7: (Optional.) Repeat steps 1 through 6 for settings group 1, 2, and 3.
Step 8: (Optional.) Repeat steps 1 through 7 for 51-2, 51-3, 51-4, and 51-5.
Step 9: (Optional.) Repeat steps 1 through 8 with CT Circuit 2 as the source for protection systems
equipped with two sets of CTs. In step 3, replace D1 with F1, D2 with F2, etc.
Table 65-4. Timing Test Settings (Phase Mode)
Sensing Type Time Dial Applied Current
5 A
0.5
5.0
9.9
1 A
0.5
5.0
9.9
Pickup Verification (3I0 Mode)
Step 1: Use BESTCOMSPlus to send the operational settings in Table 65-5 to the BE1-11m. Reset all
targets.