9424200994 Rev U
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 BE1-11g terminals D1 and D2 (A-phase).
Step 4:
Using the values listed in Table 204, 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, 51-5, 51-6, and 51-7.
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.
Pickup Verification (3I0 Mode)
Step 1:
Use BESTCOMSPlus to send the operational settings in Table 205 to the BE1-11g. Reset all
targets.
Setting
Value
Phase CT
1
Ratio
Element
3I0
Mode
BE1-11g
Table 204. Timing Test Settings (Phase Mode)
Sensing Type
Time Dial
5 A
1 A
Table 205. Operational Settings (3I0 Mode)
BESTCOMSPlus Screen
System Parameters, Sensing
Transformers
Protection, Current, Inverse Overcurrent
(51-1)
Applied Current
0.5
5.0
9.9
0.5
5.0
9.9
1.00 A
2.50 A
12.50 A
1.00 A
2.50 A
12.50 A
1.00 A
2.50 A
12.50 A
0.20 A
0.50 A
2.50 A
0.20 A
0.50 A
2.50 A
0.20 A
0.50 A
2.50 A
Description
Sets phase CT ratio to 1
Enables 51-1 function for
3I0 mode
Inverse Overcurrent (51) Test
471
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