Basler Electric BE1-11t - Manual (Page 345)

9424200995 Rev H 333
Table 124. Operational Settings (Vx Fundamental Mode)
Setting Value BESTCOMSPlus Screen Description
Aux VT Ratio 1 System Parameters, Sensing
Transformers Sets auxiliary VT ratio to 1
Aux VT
Connection AN System Parameters, Sensing
Transformers Sets auxiliary VT connection to
AN
Element Mode Vx
Fundamental Protection, Voltage,
Undervoltage (27X-1) Enables 27X-1 function for Vx
Fundamental mode
Inhibit Level 10 V Protection, Voltage,
Undervoltage (27X-1) Sets inhibit level to 10 V
Timing Mode Definite Protection, Voltage,
Undervoltage (27X-1) Selects definite timings
27X-1 AUX Enabled Target Configuration, Targets Enables Vx Fundamental target
for 27X-1
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure 242.
•
Blocking is disabled.
•
OUT1 closes for 27X-1 Trip.
•
OUT2 closes for 27X-1 Pickup.
•
Fault recording is enabled.
Figure 242. BESTlogicPlus Settings (Vx Fundamental Mode)
Step 3: Use BESTCOMSPlus to open the Protection, Voltage, Undervoltage (27X-1) screen and send
the first row of test settings in Table 125 to the BE1-11t.
Table 125. Pickup Test Settings (Vx Fundamental Mode)
Pickup Setting Time Delay
115 V 50 ms
65 V 50 ms
20 V 50 ms
Step 4: Prepare to monitor the 27X-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 242).
Step 5: Connect and apply a 120 Vac, single-phase voltage source to the Vx input, terminals C17
(polarity) and C18 (non-polarity).
Step 6: Slowly decrease the voltage until OUT2 closes and record the pickup. Verify that there is a 27X-
1-AUX 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 70 Vac for a pickup setting of 65 V and 25 Vac for a
pickup setting of 20 V as listed in Table 125. Record the results.
BE1-11t Auxiliary Undervoltage (27X) Test