Basler BE1-11g Instruction Manual page 500

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and 350 degrees lagging. OUT1 should remain closed from 170 to 180, and continuing through
350 degrees lagging (defined as forward trip direction).
Negative-Sequence Voltage Polarizing, Phase Overcurrent Elements
Step 7: 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). Reduce the A-phase voltage to 40 Vac. View
the Metering screen on the front-panel display to verify that negative-sequence voltage is
greater than 1 volt.
Step 8: Set A-phase current source to 0 amps with an angle of 80 degrees lagging (same as negative-
sequence torque angle) and slowly increase the current until OUT1 closes. Pickup will occur
within ±2% of the 50-1 pickup setting (2.45 A to 2.55A). Decrease A-phase current until OUT1
just drops out. 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 9: With the same voltage still applied, increase the A-phase current until OUT1 closes. Swing the
angle of the applied current +90 degrees and –90 degrees away from the 80-degree negative-
sequence torque angle. Verify that OUT1 opens at approximately 170 degrees lagging and 350
degrees lagging. OUT1 should remain closed from 170 to 180, and continuing through 350
degrees lagging (defined as forward trip direction).
Step 10: (Optional.) Repeat steps 4 through 9 for B-phase current (D3 and D4) and C-phase current (D5
and D6).
Negative-Sequence Voltage Polarizing, Negative-Sequence Overcurrent Elements
Step 11: Using Table 219 as a guide, send the settings to the BE1-11g.
Table 219. Directional, Negative-Sequence Operational Settings
Setting Value
Pickup 0 A Protection, Current, Instantaneous Overcurrent
(50-1)
Pickup 0 A Protection, Current, Instantaneous Overcurrent
(50-2)
Pickup 0.5 A Protection, Current, Instantaneous Overcurrent
(50-3)
Step 12: 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). Reduce the A-phase voltage to 40 Vac. View
the Metering screen on the front-panel display to verify that negative-sequence voltage is
greater than 1 volt.
Step 13: Set A-phase current source to 0 amps with an angle of 80 degrees lagging (same as negative-
sequence torque angle) and slowly increase the current until OUT3 closes (Negative-Sequence
Pickup current will be approximately 1/3 the applied A-phase current value). Decrease A-phase
current until OUT3 just drops out. Pickup will occur within ±2% of the 50-3 pickup setting (0.4 A
to 0.6 A). Dropout will occur at approximately 95% of the actual pickup value. Verify that there is
a 50-3-67-Neg SEQ target on the front-panel display.
Step 14: With the same voltage still applied, increase the A-phase current until OUT3 closes. Swing the
angle of the applied current +90 degrees and –90 degrees away from the 80-degree negative-
sequence torque angle. Verify that OUT3 opens at approximately 170 degrees lagging and 350
degrees lagging. OUT3 should remain closed from 170 to 180, and continuing through 350
degrees lagging (defined as forward trip direction).
Step 15: Using Table 220 as a guide, send the settings to the BE1-11g.
Directional Overcurrent (67) Test
BESTCOMSPlus Screen
9424200994 Rev U
Description
Sets 50-1 pickup to 0 amps
Sets 50-2 pickup to 0 amps
Sets 50-3 pickup to 0.5
amps
BE1-11g