418
Step 4:
Prepare to monitor the 27X-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 295).
Step 5:
Connect and apply a 240 Vac, single-phase voltage source to terminals C13 (A-phase) and C16
(neutral). For a single-phase input test, V1 = A-phase voltage / 3. Therefore, the BE1-11g
should pick up at a value of three times the setting value when applying only a single-phase
input. For example, to determine the pickup voltage value required for a BE1-11g with a pickup
setting of 78, it would require 78 times 3 or 234 volts of input voltage.
Step 6:
Slowly decrease the A-phase voltage until OUT2 closes and record the pickup. Verify that there
is a 27X-1-V1 target on the front-panel display. Slowly increase the voltage until OUT2 opens
and record the reset. Reset the target.
Step 7:
Verify the pickup and reset accuracy at 120 Vac for a pickup setting of 38 V (114 Vac on test
set) and 70 Vac for a pickup setting of 22 V (66 Vac on test set) as listed in Table 148. Record
the results.
Step 8:
(Optional.) Repeat steps 1 through 7 for the B-phase and C-phase voltage inputs.
Step 9:
(Optional.) Repeat steps 1 through 8 for settings group 1, 2, and 3.
Step 10: (Optional.) Repeat steps 1 through 9 for 27X-2, 27X-3, and 27X-4.
Timing Verification (V1 Mode)
Step 1:
Use BESTCOMSPlus to open the Protection, Voltage, Undervoltage (27X-1) screen and send
the first row of test settings in Table 149 to the BE1-11g for settings group 0.
Step 2:
Prepare to monitor the 27X-1 timings. Timing accuracy is verified by measuring the elapsed
time between a sensing voltage change and OUT1 closing.
Step 3:
Connect and apply a 120 Vac, single-phase voltage source to terminals C13 (A-phase) and C16
(neutral).
Step 4:
Step the voltage down to 110 volts. Measure the time delay and record the result.
Auxiliary Undervoltage (27X) Test
Figure 295. BESTlogicPlus Settings (V1 Mode)
Table 148. Pickup Test Settings (V1 Mode)
Pickup Setting
78 V
38 V
22 V
Table 149. Timing Test Settings (V1 Mode)
Pickup Setting
38 V
38 V
38 V
9424200994 Rev U
Time Delay
50 ms
50 ms
50 ms
Time Delay
2,000 ms
5,000 ms
10,000 ms
BE1-11g
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