9328900990 Rev L BE1-951 Testing and Maintenance 13-33
out. Pickup will occur within ±2 percent of the 50TN pickup setting. Dropout will occur at 93% to
97% of actual pickup. Verify the 67N target on the HMI.
Step 4: With the same polarizing current applied, increase the A-phase current until OUT2 closes.
Swing the angle of the applied current +90 degrees and -90 degrees away from the 0. Verify
that OUT2 opens at approximately 90 degrees I lag E and 270 degrees I lag E. OUT2 should
remain closed from 90 through 0 to 270 degrees I lag E (defined as forward trip direction).
Step 5: Repeat Steps 1 through 4 for "Reverse Polarization by transmitting the "R" command in the
operational setting, i.e., S0-50TP=2.5,0,R. Relay operation will occur at 180 degrees I lag E.
Swing the angle of the applied current +90 degrees and -90 degrees away from the 180
degrees. Verify that OUT2 opens at approximately 90 degrees I lag E and 270 degrees I lag E.
OUT2 should remain closed from 90 through 180 to 270 degrees I lag E (defined as reverse trip
direction).
Step 6: (Optional.) Repeat Steps 1 through 5 for 150TN, 51N, and 151N. Setup commands in
Table
13-34 and operational settings in
Table 13-39 must be modified accordingly, i.e., all "50" entries
would change to "150", and so on.
Step 7: (Optional.) Repeat Steps 1 through 5 for Setting Groups 1, 2, and 3.
Directional Power (32)
Purpose: To verify the operating accuracy of the forward and reverse 32 functions.
Reference Commands: SG-LINE, SL-32, S0-32, RG-STAT
Step 1: To prepare the 32 element for directional testing, transmit the commands in
Table 13-40 to the
relay.
Table 13-40. 32 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.
SL-N=32 Sets custom logic name.
SL-32=1,0 Enables 32 and disables blocking.
SL-VO1=32T Enables OUT1 to close for 32 trip.
SG-TRIG=32T,32PU,0 Enable 32T to log and trigger fault recording.
SG-VTP=1,4W,PN,PN Set VT phase voltage parameters.
SG-CT=1 Sets P, N CT ratio at 1:1
EXIT;Y Exit and save settings.
Forward Tripping Direction
Step 1: Using
Table 13-41 as a guide, transmit the 32 setting commands to the relay. Prior to each
directional test, reset the relay targets (HMI screen) from the previous test.
Table 13-41. 32 Operational Settings
Operating Settings Purpose
S0-32=500,50ms,F Sets 32 to 500 watts, TD = 50ms, Forward Trip Direction.
S0-32=1000,50ms,F Sets 32 to 1000 watts, TD = 50ms, Forward Trip Direction.
S0-32=2000,50ms,F Sets 32 to 2000 watts, TD = 50ms, Forward Trip Direction.
Step 2: Connect and apply a 100 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.
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