9328900990 Rev L BE1-951 Testing and Maintenance 13-19
Table 13-8. 50T/150T Element Accuracy
Sensing Type Pickup Accuracy
A or B (1 A)
±2% or ±10mA
D, E, or F (5 A)
±2% or ±50mA
Step 7: (Optional.) Repeat Steps 3 through 6 for phase B (Terminals D3 and D4) and phase C
(Terminals D5 and D6).
Step 8: (Optional.) Repeat Steps 1 through 7 for the 150T elements. Overwrite the 50T commands
entered in Step 2 with the commands of
Table 13-9.
Table 13-9. 150TP Pickup Test Commands
Command Purpose
A= Gains write access.
SL-150T=1,0 Enables 150TP, disables blocking.
SL-VO1=150TPT Enables OUT1 to close for 150TP trip.
SL-VO2=150TNT Enables OUT2 to close for 150TN trip.
SG-TRIGGER=150TPT+150TNT,
150TPPU+150TNPU,0
Enable 150TPT or 150TNT to log and trigger fault recording.
EXIT;Y Exit and save settings.
Step 9: (Optional.) Repeat Steps 1 through 8 for the 50T and 150T elements in Setting Groups 1, 2, and
3. Before testing settings in other setting groups, a setting group must be selected using the
CS/CO-GROUP commands. To activate Setting Group 1, CS-GROUP=1 would be entered to
select Setting Group 1 and CO-GROUP=1 would be entered to make Setting Group 1 active.
Also, the pickup settings made in Step 3 (
Table 13-7) must be changed to specify the setting
group being tested. To test settings in Group 1, replace the 0 in the S0-x50 commands with a 1
(S1-x50).
50TP/150TP and TN (Calculated 3Io) Time Delay Verification
Step 1: Connect a current source to Terminals D1 and D2 (A-phase). Refer to
Figure 13-1 for terminal
locations.
Step 2: Prepare the 50T/150T elements for testing by transmitting the commands in
Table 13-10 to the
relay.
Table 13-10. 50T Time Delay 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=TD50 Sets TD50 as custom logic name.
SL-50T=1,0 Enables 50TP, 50TN (3Io), and 50TQ and disables blocking.
SL-VO1=50TPT Enables OUT1 to close for 50TP trip.
SL-VO2=50TNT Enables OUT2 to close for 50TN trip.
SG-CT=1 Sets P, N CT ratio at 1:1
SG-TRIG=50TPT+50TNT,
50TPPU+50TNPU,0
Enable 50TPT or 50TNT to log and trigger fault recording.
EXIT;Y Exit and save settings.
Step 3: Using Table 13-11, transmit the first column of setting commands.
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