Basler BE1-11g Instruction Manual page 488

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Step 8: (Optional.) Repeat steps 1 through 7 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 (IG Mode)
Step 1: Use BESTCOMSPlus to send the operational settings in Table 213 to the BE1-11g. Reset all
targets.
Setting Value
Ground CT 1
Ratio
Element IG
Mode
Source CT Circuit 1
51-1 IND Enabled
GND
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure 319.
•
Blocking is disabled.
•
OUT1 closes for 51-1 Trip.
•
OUT2 closes for 51-1 Pickup.
•
Fault recording is enabled.
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 BE1-11g for your sensing input
type in Table 214.
Step 4: Prepare to monitor the 51-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 319).
Step 5: Connect a current source to terminals D7 and D8 (IG).
Step 6: Slowly increase the ground current until OUT2 closes and record the pickup. Verify that there is
a 51-1-IND GND 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 settings group 1, 2, and 3.
Step 9: (Optional.) Repeat steps 1 through 8 for 51-2, 51-3, 51-4, 51-5, 51-6, and 51-7.
Inverse Overcurrent (51) Test
Table 213. Operational Settings (IG Mode)
BESTCOMSPlus Screen
System Parameters, Sensing
Transformers
Protection, Current, Instantaneous
Overcurrent (51-1)
Protection, Current, Instantaneous
Overcurrent (51-1)
Target Configuration, Targets
Figure 319. BESTlogicPlus Settings (IG Mode)
9424200994 Rev U
Description
Sets ground CT ratio to 1
Enables 51-1 function for
IG mode
Selects CT circuit 1 as the
source
Enables IND GND target
for 51-1
BE1-11g