13-42
Testing and Maintenance
BE1-951
Table 13-57. 27X and 59X/159X Pickup and Time Delay Settings (3Eo)
Pickup and Time Delay Settings
Purpose
Undervoltage
Over voltage
S0-27X=10,2s
S0-59X/159X=30,2s
Sets 27X PU at 10V, 59X/159X at
30V
Sets 27X TD, 59X/159X TD at 2s
S0-27X=0,5s
S0-59X/159X=0,5s
Sets 27X TD, 59X/159X TD at 5s
S0-27X=0,10s
S0-59X/159X=0,10s
Sets 27X TD, 59X/159X TD at 10s
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, 20 Vac to terminals C13 (polarity) and C16 (non-polarity).
Refer to Figure 13-1 for terminal locations.
Step 4 Step the voltage down to 5 volts. Measure the time delay and verify the accuracy of the 27X time
delay setting. Timeing accuracy is + 5 percent or + 3 cycles of the time delay setting.
Step 5 Step the voltage up to 35 volts. Measure the time delay and verify the accuracy of the 59X/159X
time delay setting. Timeing accuracy is + 5 percent or + 3 cycles of the time delay setting.
Step 6 Repeat Steps 5 and 6 for the middle and upper time delay settings of Table 13-54.
Step 7 (Optional) Repeat Steps 2 through 6 for setting groups 1, 2, and 3.
Auxiliary Undervoltage and Overvoltage Pickup Verification (fundamental 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=
Gain 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=1,0
Enables 27X, disables blocking
SL-59X/159X=1,0
Enables 59X/159X, disables blocking
SL-VO1=27XT+59X/159XT
Enables OUT1 to close for 27X or 59X/159X
trip
SG-
TRIG=27XT+59X/159XT,27XPU+59XP
/159XPU
Enables 27XT and 59XT/159XT to log and
trigger fault recording.
EXITY;Y
Exit and save settings
Step 2 Using Table 13-59 as a guide, transmit the first row of setting commands (highest 27X PU, lowest
59XPU/159XPU) to the relay.