Basler BE1-11m - Page 382

65-2 9424200996
Inverse Overcurrent (51) Test BE1-11m
Figure 65-1. BESTlogicPlus Settings (Phase Mode)
Step 3: Use BESTCOMSPlus to open the Protection, Current, Inverse Overcurrent (51-1) screen and
send the low range test settings (minimum pickup setting) to the BE1-11m for your sensing input
type in Table 65-2.
Table 65-2. Pickup Test Settings (Phase Mode)
Sensing Input
Type
Range Pickup Setting Time Dial Time Curve
5 A
Low
0.5 A
0
I2
Middle
5.0 A
0
I2
High
16.0 A
0
I2
1 A
Low
0.1 A
0
I2
Middle
1.0 A
0
I2
High
3.2 A
0
I2
Step 4: Prepare to monitor the 51-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 65-1).
Step 5: Connect a current source to terminals D1 and D2 (A-phase). Note that mode can be set for IA,
IB, IC, or 3 phases. Test is conducted on IA.
Step 6: Slowly increase the A-phase current until OUT2 closes and record the pickup. Verify that there
is a 51-1-A target on the front-panel display. Slowly decrease the applied current until OUT2
opens and record the dropout.
Step 7: Repeat step 6 for the middle and high range pickup settings for your sensing input type. Record
the results.
Step 8: (Optional.) Repeat steps 1 through 7 for phase B and phase C. Note: Be sure to change
Element Mode and enable proper target for each phase being tested.
Step 9: (Optional.) Repeat steps 1 through 8 for settings group 1, 2, and 3.
Step 10: (Optional.) Repeat steps 1 through 9 for 51-2, 51-3, 51-4, and 51-5.
Step 11: (Optional.) Repeat steps 1 through 10 with CT Circuit 2 as the source for protection systems
equipped with two sets of CTs. In step 5, replace D1 with F1, D2 with F2, etc.
Timing Verification (Phase Mode)
Step 1: Use BESTCOMSPlus to open the Protection, Current, Inverse Overcurrent (51-1) screen and
send the test settings in Table 65-3 to the BE1-11m for settings group 0.
Table 65-3. Timing Test Settings (Phase Mode)
Pickup Setting
Time Curve
0.5 A (5 A sensing), 0.1 A (1 A sensing or SEF)
I2