Basler BE1-11g, Instruction Manual

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9424200994 Rev U 487
BE1-11 g Directional Overcurrent (67) Test
Figure 320. BESTlogicPlus Settings
Step 3: Using Table 218 as a guide, send the settings to the BE1-11
g
. Prior to each directional test,
reset the BE1-11
g
targets from the previous test. Max Torque Angle setting, for positive and
zero sequence impedance angles is continuously adjustable between 0 and 90
°
, the default
setting of 80
°
is used in the test example.
Table 218. Negative-Sequence Polarization Operational Settings
Setting Value BESTCOMSPlus Screen Description
Polarization
Method IG=unchecked
Q=checked
V=unchecked Protection, Current, Directional
(67-1) Selects negative sequence
polarization
Pickup 2.5 A Protection, Current, Instantaneous
Overcurrent (50-1) Sets 50-1 pickup to 2.5
amps
Pickup 0 A Protection, Current, Instantaneous
Overcurrent (50-2) Sets 50-2 pickup to 0
amps
Pickup 0 A Protection, Current, Instantaneous
Overcurrent (50-3) Sets 50-3 pickup to 0
amps
Positive-Sequence Voltage Polarizing, Phase Overcurrent Elements
Step 4: Connect and apply a 120 Vac, three-phase voltage source at nominal frequency to terminals
C13 (A-phase), C14 (B-phase), C15 (C-phase), and C16 (neutral). Connect a variable ac
current source to terminals D1 (A-phase polarity) and D2 (A-phase non-polarity).
Step 5: Set A-phase current source to 0 amps with an angle of 80 degrees lagging (positive-sequence
torque angle) and slowly increase the current until OUT1 closes. Decrease A-phase current until
OUT1 just drops out. Pickup will occur within
±
2% of the 50-1 pickup setting (2.45 A to 2.55A).
Dropout will occur at approximately 95% of the actual pickup value. Verify that there is a 50-1-
67-A target on the front-panel display.
Step 6: With three-phase voltage still applied, increase the A-phase current until OUT1 closes. Swing
the angle of the applied c90 degrees and –90 degrees away from the 80-degree
positive-sequence torque angle. Verify that OUT1 opens at approximately 170 degrees lagging