Basler BE1-11m - Page 334

58-2 9424200996
Phase Undervoltage (27P) Test BE1-11m
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure
58-1.
• Blocking is disabled.
• OUT1 closes for 27P-1 Trip.
• OUT2 closes for 27P-1 Pickup.
• Fault recording is enabled.
Figure 58-1. BESTlogicPlus Settings
Step 3: Use BESTCOMSPlus to open the Protection, Voltage, Undervoltage (27P-1) screen and send
the first row of test settings in Table 58-2 to the BE1-11m.
Table 58-2. Pickup Test Settings
Pickup Setting
Time Delay
235 V
50 ms
115 V
50 ms
65 V
50 ms
Step 4: Prepare to monitor the 27P-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 58-1).
Step 5: Connect and apply a 240 Vac, three-phase voltage source to terminals C13 (A-phase), C14 (B-
phase), C15 (C-phase), and C16 (Neutral).
Step 6: Slowly decrease the A-phase voltage until OUT2 closes and record the pickup. Verify that there
is a 27P-1-A target on the front-panel display. Slowly increase the A-phase 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 115 V and 70 Vac for a
pickup setting of 65 V as listed in Table 58-2. Record the results.
Step 8: (Optional.) Repeat steps 1 through 7 for the B-phase and C-phase voltage inputs. Note: Be sure
to enable proper target for each phase being tested.
Step 9: (Optional.) Repeat steps 1 through 8 for settings group 1, 2, and 3.
Step 10: (Optional.) Repeat steps 1 through 9 for 27P-2, 27P-3, and 27P-4.
Timing Verification
Step 1: Use BESTCOMSPlus to open the Protection, Voltage, Undervoltage (27P-1) screen and send
the first row of test settings in Table 58-3 to the BE1-11m for settings group 0.
Table 58-3. Timing Test Settings
Pickup Setting
Time Delay
115 V
2,000 ms
115 V
5,000 ms
115 V
10,000 ms