9424200994 Rev N 507
opens. Reset the target. Impedance values for this test have been converted to measureable
phase-neutral voltages.
Figure 313. BESTlogicPlus Settings
Step 7: (Optional.) Repeat steps 1 through 6 for settings group 1, 2, and 3.
Step 8: (Optional.) Repeat steps 1 through 7 for the mho Characteristic 2.
Timing Verification
Step 1: Use BESTCOMSPlus to verify the operational settings in Table 232. Reset all targets.
Step 2: Prepare to monitor the 40Z timings. Timing accuracy for the 40Z function is verified by
measuring the elapsed time between OUT2 (40Z pickup) and OUT1 (40Z trip) closing. Time
accuracy for the VC function is verified by measuring the elapsed time between OUT4 (VC
pickup) and OUT3 (VC trip) closing.
Step 3: Connect and apply balanced three-phase 2.0∠90° A, 2.0∠330° A, 2.0∠210° A to terminals D1
through D6 and a balanced three-phase 11.0∠0° V, 11.0∠240° V, 11.0∠120° V phase-neutral
voltage source to terminals C13 (A-phase), C14 (B-phase), C15 (C-phase), and C16 (Neutral).
All outputs should remain open.
Step 4: Slowly decrease the voltage level until OUT2 closes (40Z pickup). The time between OUT2
(40Z pickup) and OUT1 (40Z trip) should be 2,000 ms ±33.3 ms.
Step 5: Continue decreasing the voltage until OUT4 closes (VC pickup). The time between OUT4 and
OUT3 (VC trip) should be 1,000 ms ±33.3 ms. Reset the target.
Step 6: (Optional.) Repeat steps 1 through 5 for settings group 1, 2, and 3.
Step 7: (Optional.) Repeat steps 1 through 6 for the mho Characteristic 2.
Functional Test Report
Pickup Verification (mho Characteristic 1)
Directional Supervision Angle Accuracy = ±2%
Diameter Setting Accuracy = ±3%
Offset Accuracy = ±3%
Voltage Pickup Accuracy = ±1%
BE1-11g Loss of Excitation – Impedance Based (40Z) Test
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