Basler BE1-951 - Directional Overcurrent (67)

9328900990 Rev L BE1-951 Testing and Maintenance 13-29
Directional Overcurrent (67)
Purpose: To verify the operating accuracy of the 67 Directional Overcurrent function.
Reference Commands: SG-LINE, SL-50/51, S0-67, RG-STAT
Step 1: To prepare the 50TP, N, and Q elements for directional testing, transmit the commands in
Table
13-34 to the relay. Reset Targets.
Table 13-34. 50TP, 50TN, and 50TQ Directional Pickup Test Commands
Command Purpose
A= Gains write access.
SL-N=NONE
Zero out custom logic settings. Overwrite with LOGIC=NONE
settings.
Y Confirm overwrite.
SG-VTP=1,4W,PN,PN Set VT phase voltage parameters.
SG-VTX=1,AN Set auxiliary voltage parameters.
SL-N=67 Sets custom logic name.
SL-50TP=1,0 Enables 50TP and disables blocking.
SL-50TN=1,0 Enables 50TN and disables blocking.
SL-50TQ=1,0 Enables 50TQ and disables blocking.
SL-VO1=50TPT Enables OUT1 to close for 50TPT trip.
SL-VO2=50TNT Enables OUT2 to close for 50TNT trip.
SL-VO3=50TQT Enables OUT3 to close for 50TQT trip.
SG-TRIG=50TPT+50TNT+50TQT,
50TPPU+50TNPU+50TQPU,0
Enable 50TP, 50NT, or 50QT to log and trigger fault recording.
SG-CT=1 Sets P, N CT ratio at 1:1
SG-LINE=8,80,24,80,100 Set line conditions.
EXIT;Y Exit and save settings.
Step 2: Using
Table 13-35 as a guide, transmit the 67 setting commands to the relay. Prior to each
directional test, reset the relay targets (HMI screen) from the previous test.
Table 13-35. 67P-50TP Operational Settings
Operating Settings Purpose
S0-67=Q Sets 67N to Negative-Sequence Polarizing.
S0-50TP=2.5,0,F Sets 50TP at 2.5 amps, 0 Time Delay, Forward Tripping Direction.
S0-50TN=0,0,F Sets 50TN at 0 amps, 0 Time Delay, Forward Tripping Direction.
S0-50TQ=0,0,F Sets 50TQ at 0 amps, 0 Time Delay, Forward Tripping Direction.
Positive-Sequence Voltage Polarizing, Phase Overcurrent Elements
Step 3: Connect and apply a 120 Vac, three-phase voltage source at nominal frequency to Terminals
C13 (A-phase), C14 (B-phase), C15 (C-phase), and C16 (Neutral). Connect a variable ac
current source to Terminals D1 (A-phase polarity) and D2 (A-phase non-polarity). Refer to
Figure 13-1 for terminal locations.
Step 4: Apply 0 amps A-phase current at an angle of 80 degrees I lag E (positive-sequence line angle)
and slowly increase the current until OUT1 closes. Decrease A-phase current until OUT1 just
drops out. Pickup will occur within ±2 percent of the 50TP pickup setting. Dropout will occur at
93 to 97% of actual pickup. Verify 67A target on the HMI.