9328900990 Rev L BE1-951 Testing and Maintenance 13-41
Table 13-57. 27X and 59X/159X Pickup and Time Delay Settings
Pickup and Time Delay Settings
Undervoltage Overvoltage
Purpose
S0-27X=50,2S S0-59X/159X=110,2S Sets 27X PU at 50 V, 59X/159X at 110 V, TD at 2 sec.
S0-27X=,5S S0-59X/159X=,5S Sets 27X PU at 50 V, 59X/159X at 110 V, TD at 5 sec.
S0-27X=,10S S0-59X159X=,10S Sets 27X PU at 50 V, 59X/159X at 110 V, TD at 10 sec.
Step 2: Prepare to monitor the 27X and 59X/159X timings. Timing accuracy is verified by measuring the
elapsed time between a sensing voltage change and OUT1 closing.
Step 3: Connect and apply a single-phase, 80 Vac voltage source to Terminals C17 (polarity) and C18
(non-polarity). Refer to
Figure 13-1 for terminal locations.
Step 4: Step the voltage down to 45 volts. Measure the time delay and verify the accuracy of the 27X
time delay setting. Timing accuracy is ±0.5 percent or ±1 cycles of the time delay setting.
Step 5: Step the voltage up to 115 volts. Measure the time delay and verify the accuracy of the
59X/159X time delay setting. Timing accuracy is ±0.5 percent or ±1 cycles of the time delay
setting.
Step 6: Repeat Steps 5 and 6 for the middle and upper time delay settings of
Table 13-57.
Step 7: (Optional.) Repeat Steps 2 through 6 for Setting Groups 1, 2, and 3.
Auxiliary Undervoltage/Overvoltage Pickup Verification (3
rd
Harmonic Vx Input)
Step 1: Prepare the 27X and 59X/159X pickup functions for testing by transmitting the commands in
Table 13-58 to the relay. Reset targets.
Table 13-58. 27X and 59X/159X 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=27X_59X/159X Sets 27X_59X/159X as custom logic name.
SG-VTX=1,AN Set auxiliary voltage parameters.
SL-27X=3,0 Enables 27X, disables blocking.
SL-59X/159X=3,0 Enables 59X/159X, disables blocking.
SL-VO1=27XT+59XT+159XT Enables OUT1 to close for 27X, 59X, or 159X trip.
SG-TRIG=27XT+59XT+159XT,
27XPU+59XPU+159XPU,0
Enables 27XT, 59XT, or 159XT to log and trigger fault recording.
EXIT;Y Exit and save settings.
Step 2: Using Table 13-59 as a guide (same values as the fundamental test but at 3rd harmonic
frequency), transmit the first row of setting commands (highest 27X PU; lowest 59XPU/159X
PU) to the relay.
Table 13-59. 27X and 59X/159X Pickup Settings
Pickup and Time Delay Settings
Undervoltage Overvoltage
Purpose
S0-27X=70,50ms S0-59X/159X=90,50ms Sets 27X PU at 70 V, 59X/159X at 90 V, TD at min.
S0-27X=60,50ms S0-59X/159X=100,50ms Sets 27X PU at 60 V, 59X/159X at 100 V, TD at min.
S0-27X=50,50ms S0-59X159X=110,50ms Sets 27X PU at 50 V, 59X/159X at 110 V, TD at min.
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