13-22 BE1-951 Testing and Maintenance 9328900990 Rev L
Step 9: (Optional.) Repeat Steps 1 through 8 for the 50TQ and 150TQ elements in Setting Groups 1, 2,
and 3.
50TQ/150TQ Time Delay Verification
Step 1: Connect a current source to Terminals D1 and D2 (A-phase).
Step 2: Prepare the 50TQ and 150TQ elements for testing by transmitting the commands in
Table
13-17 to the relay.
Table 13-17. 50TQ/150TQ Time Delay 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=Q50 Sets Q50 as custom logic name.
SL-50TQ=1,0 Enables 50TQ, disables blocking.
SL-150TQ=1,0 Enables 150TQ, disables blocking.
SL-VO1=50TQT Enables OUT1 to close for 50TQ trip.
SL-VO2=150TQT Enables OUT2 to close for 150TQ trip.
SG-CT=1 Sets CT ratio at 1.
SG-TRIGGER=50TQT+50TQPU,
150TQT+150TQPU,0
Enable 50TQT and 150TQT to log and trigger fault recording.
EXIT;Y Exit and save settings.
Step 3: Using
Table 13-18, transmit the first column of setting commands for your sensing input type
(substitute 0.1 for 1 amp CT).
Table 13-18. 50TQ/150TQ Time Delay Settings
Pickup and Time Delay Settings
2 Second TD 5 Second TD 10 Second TD
Purpose
S0-50TQ=0.5,2S S0-50TQ=0.5,5S S0-50TQ=0.5,10S Sets 50TQ TD.
For a single-phase input test, I
2
= Ia/3. Therefore, the relay should pick up at a value of three times the
setting value when applying only a single-phase input. For example, to determine the pickup current value
required for a 1 A relay with a pickup setting of 0.1, it would require 0.1 times 3 or 0.3 amperes of input
current.
Step 4: Step the applied A-phase current to 110% of pickup. Measure the time delay and verify the
accuracy of the 50TQ time delay setting, OUT1, and 150TQ, OUT2. Timing accuracy is ±5
percent or ±3 cycles of the time delay setting.
Step 5: Repeat Step 2 and 3 for the middle and higher time delay settings in
Table 13-18.
Step 6: (Optional.) Repeat Steps 3 through 5 for phase B (Terminals D3 and D4) and phase C
(Terminals D5 and D6).
Step 7: (Optional.) Repeat Steps 1 through 6 for Setting Groups 1, 2, and 3.
50TN/150TN (Independent Ground Input IG) Pickup and Dropout Verification
Purpose: To verify the operation of the 50TN and 150TN elements for IG input.
Reference Commands: SL-50TN/150TN
Step 1: Connect a current source to Terminals D7 and D8 (IG).
Step 2: Prepare the 50TN and 150TN elements for testing by transmitting the commands in
Table 13-19
to the relay. Reset targets.
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