Basler BE1-11g Instruction Manual page 518

506
Setting
Circuit 1 Ground No
Compensation
(Optional) Circuit Primary
1 Diff. Circuit
Circuit 1 Polarity Normal
Circuit 1 Phase A
Relationship
Mode Enabled
Iop Minimum (A) 2.00
Time Delay (ms) 100
Overcorrection 1.30
Coefficient
CT Flip No
CT Source CT1, IG1
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure 323.
•
Blocking is disabled.
•
OUT1 closes for 87N-1 Trip.
•
OUT2 closes for 87N-1 Pickup.
•
Fault recording is enabled.
Step 3: Prepare to monitor the 87N-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 323).
Step 4: Connect a single-phase 60-Hz current source to terminals D1 and D2 (CT1 A-phase): 3.0 A
∠0°. Connect a single-phase current source to terminals D7 and D8 (IG input): 3.0 A ∠180°.
Verify that Iop is around zero amps.
Neutral Current Differential (87N) Test
Value BESTCOMSPlus Screen
System Parameters, Transformer
Setup
System Parameters, Transformer
Setup
System Parameters, Transformer
Setup
System Parameters, Transformer
Setup
Protection, Current, Neutral
Differential (87N-1)
Protection, Current, Neutral
Differential (87N-1)
Protection, Current, Neutral
Differential (87N-1)
Protection, Current, Neutral
Differential (87N-1)
Protection, Current, Neutral
Differential (87N-1)
Protection, Current, Neutral
Differential (87N-1)
Figure 323. BESTlogicPlus Settings
9424200994 Rev U
Description
Disables the primary
winding zero sequence
trap
Establishes circuit 1 on the
primary side of the
transformer. For report
labeling purposes only.
Sets the phase rotation of
circuit 1 for ABC
Sets A-phase in circuit 1
equal to the phase
relationship setting for
circuit 2
Enables the neutral
differential element
Sets the minimum operate
current required for pickup
to 2 A
Sets the time to trip after a
pickup to 100 ms
Sets the sensitivity of the
directional sensing by
using a factor of 1.30
Stipulates that IG is in
phase with 3I0 for internal
faults
Sets the differential zone
with CT1 and IG1
BE1-11g