Basler BE1-951 - Time Overcurrent (51)

13-24 BE1-951 Testing and Maintenance 9328900990 Rev L
50TN/150TN (Independent Ground Input IG) Time Delay Verification
Step 1: Prepare the 50TN and 150TN elements for testing by transmitting the commands in
Table 13-19
to the relay.
Step 2: Using
Table 13-22, transmit the first column of setting commands for your sensing input type
(5A is shown).
Table 13-22. 50TN/150TN Time Delay Settings
Pickup and Time Delay Settings
2 Second TD 5 Second TD 10 Second TD
Purpose
S0-50TN=0.5,2S S0-50TN=0.5,5S S0-50TN=0.5,10S Sets 50TN TD.
S0-150TN=0.5,2S S0-150TN=0.5,5S S0-150TN=0.5,10S Sets 150TN TD.
Step 3: With the current source still connected to Terminals D7 and D8 (IG), step the applied current to
.55 amps (for 1 amp CT circuit divide by 5). Measure the time delay and verify the accuracy of
the 50TN time delay setting, OUT1, and 150TN, OUT2. Timing accuracy is ±5 percent or ±3
cycles of the time delay setting.
Step 4: Repeat Step 2 and 3 for the middle and higher time delay settings in
Table 13-22.
Step 5: (Optional.) Repeat Steps 1 through 4 for Setting Groups 1, 2, and 3.
Time Overcurrent (51)
Timing Verification
Purpose: To verify the timing operation of the 51 and 151 elements.
Reference Commands: SL-51PNQ/151N, S<g>-51P
Step 1: Prepare the 51 element for testing by transmitting the commands in
Table 13-23 to the relay.
Table 13-23. 51P/51N/51Q Timing Test Commands
Command Purpose
A= Gains write access.
SL-N=NONE Zero out custom settings. Overwrite with LOGIC=NONE settings.
Y Confirm overwrite.
SL-N=PU51 Sets PU51 as custom logic name.
SL-51P=1,0 Enables 51P, disables blocking.
SL-51N=1,0 Enables 51N, disables blocking.
SL-51Q=1,0 Enables 51Q, disables blocking.
SL-VO1=51PT Enables OUT1 to close for 51P trip.
SL-VO2=51NT Enables OUT2 to close for 51N trip.
SL-VO3=51QT Enables OUT3 to close for 51Q trip.
SG-CT=1 Sets CT ratio at 1.
SG-
TRIG=51PT+51NT+51QT,
51PPU+51NPU+51QPU,0
Enable 51PT, 51NT, or 51QT to log and trigger fault recording.
EXIT;Y Exit and save settings.
Step 2: Transmit the appropriate commands in
Table 13-24 for your sensing input type.