Basler Electric BE1-11m - Manual (Page 357)

9424200996 Rev L 345
Table 140. Operational Settings (IG Mode)
Setting Value BESTCOMSPlus Screen Description
Ground CT
Ratio 1 System Parameters, Sensing
Transformers Sets ground CT ratio to 1
Element Mode IG Protection, Current, Instantaneous
Overcurrent (50-1) Enables 50-1 function for IG
mode
Source CT Circuit 1 Protection, Current, Instantaneous
Overcurrent (50-1) Selects CT circuit 1 as the
source
50-1 IND GND Enabled Target Configuration, Targets Enables IND GND target for
50-1
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure 256.
•
Blocking is disabled.
•
OUT1 closes for 50-1 Trip.
•
OUT2 closes for 50-1 Pickup.
•
Fault recording is enabled.
Figure 256. BESTlogicPlus Settings (IG Mode)
Step 3: Use BESTCOMSPlus to open the Protection, Current, Instantaneous Overcurrent (50-1) screen
and send the low range test settings (minimum pickup setting) to the BE1-11m for your sensing
input type in Table 141.
Table 141. Pickup Test Settings (IG Mode)
Sensing Input Type Range Pickup Setting Time Delay
5 A
Low 0.5 A 0 ms
Middle 5.0 A 0 ms
High 10.0 A 0 ms
1 A or SEF
Low 0.1 A 0 ms
Middle 1.0 A 0 ms
High 2.0 A 0 ms
Step 4: Prepare to monitor the 50-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 256).
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 50-1-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.
BE1-11m Instantaneous Overcurrent (50) Test