13-26 BE1-951 Testing and Maintenance 9328900990 Rev L
Step 2: To prepare the 51P, 51N, and 51Q elements for testing, transmit the commands in Table 13-26
to the relay. Reset targets.
Table 13-26. 51P/51N/51Q 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=PU51 Sets PU51 as custom logic name.
SL-51P=1,0 Enables 51P and disables blocking.
SL-51N=1,0 Enables 51N and disables blocking.
SL-51Q=1,0 Enables 51Q and disables blocking.
SL-VO1=51PT Enables OUT1 to close for 51PT trip.
SL-VO2=51NT Enables OUT2 to close for 51NT trip.
SL-VO3=51QT Enables OUT3 to close for 51QT trip.
SG-CT=1 Sets P, N CT ratio at 1:1
SG-TRIGGER=51PT+51NT+51QT,
51PPU+51NPU+51QPU,0
Enable 51PT, 51NT, or 51QT to log and trigger fault recording.
EXIT;Y Exit and save settings.
Step 3: Using
Table 13-27 as a guide, transmit the first row of setting commands (minimum pickup
setting) for your sensing type.
Table 13-27. 51P/51N/51Q Pickup Settings
Pickup Settings
Sensing
Type
Phase Neutral Neg.-Sequence
Purpose
S0-51P=0.5,0,I2,N S0-51N=0.5,0,I2,N S0-51Q=0.5,0,I2,N Sets 51PNQ PU at 0.5 A.
S0-51P=5.0,0,I2,N S0-51N=5.0,0,I2,N S0-51Q=5.0,0,I2,N Sets 51PNQ PU at 5.0 A.
5 A
S0-51P=25,0,I2,N S0-51N=25,0,I2,N S0-51Q=25,0,I2,N Sets 51PNQ PU at 25 A.
S0-51P=0.1,0,I2,N S0-51N=0.1,0,I2,N S0-51Q=0.1,0,I2,N Sets 51PNQ PU at 0.1 A.
S0-51P=1.0,0,I2,N S0-51N=1.0,0,I2,N S0-51Q=1.0,0,I2,N Sets 51PNQ PU at 1.0 A.
1 A
S0-51P=5.0,0,I2,N S0-51N=5.0,0,I2,N S0-51Q=5.0,0,I2,N Sets 51PNQ PU at 5.0 A.
Step 4: Slowly increase the A-phase current until OUT1 (51P pickup indicator) closes. Verify that pickup
occurs within the specified accuracy listed in
Table 13-28. Slowly decrease the applied current
until OUT1 opens. Dropout should occur at 93 to 97 percent of pickup. Verify 51A and 51N
targets on the HMI. Repeat Step4 while monitoring OUT2 (51N). Verify the pickup and dropout
accuracy of the middle and upper pickup settings for your sensing type.
Table 13-28. 51P/51N Element Accuracy
Sensing Type Pickup Accuracy
A or B (1 A)
±2% or ±10mA
D, E, or F (5 A)
±2% or ±50mA
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