9328900990 Rev L BE1-951 Testing and Maintenance 13-35
Step 2: Using Table 13-44 as a guide, transmit the first row of setting commands to the relay.
Table 13-44. Trip and Alarm Pickup Settings
Overexcitation Settings
TRIP ALARM
Purpose
S0-24=1.0,0.0,0.0 SA-24=50
Sets 24 PU at 1.0 V/H, Trip Time Dial = 0, Reset Time Dial = 0.
Sets 24 Alarm at 50% of Trip PU.
S0-24=2.0,0.0,0.0 SA-24=75
Sets 24 PU at 2.0 V/H, Trip Time Dial = 0, Reset Time Dial = 0.
Sets 24 Alarm at 75% of Trip PU.
S0-24=3.0,0.0,0.0 SA-24=95
Sets 24 PU at 3.0 V/H, Trip Time Dial = 0, Reset Time Dial = 0.
Sets 24 Alarm at 95% of Trip PU.
Step 3: Prepare to monitor the operation of the 24 Alarm and Trip functions. Alarm operation can be
verified by monitoring the Major Alarm LED on the relay's front panel. Operation of 24T can be
verified by monitoring OUT1.
Step 4: Connect a 120 Vac, three-phase, 50 or 60 hertz voltage source (depending on users nominal
frequency) to Terminals C13 (A-phase), C14 (B-phase), C15 (C-phase), and C16 (Neutral).
Refer to
Figure 13-1 for terminal locations.
Step 5: Apply A-phase voltage at nominal frequency and slowly increase until the Major Alarm LED
lights (V/H PU x Freq x % Alarm = PU). Pickup should occur within ±2 percent or 1 volt of the
Alarm setting. Continue increasing the A-phase voltage until OUT1 closes (V/H Trip x Freq =
PU). Pickup should occur within ±2 percent or 1 volt of the Trip pickup setting. Slowly decrease
the A-phase voltage until OUT1 opens. Dropout should occur between 97 and 98 percent of the
actual pickup value (Trip and Alarm). Verify the pickup and dropout accuracy of the middle and
upper 24 Alarm and Trip pickup settings listed in
Table 13-44.
Step 6: Verify the 24 target on the HMI.
Step 7: (Optional.) Repeat Steps 2 through 5 for frequencies other than nominal.
Step 8: (Optional.) Repeat Steps 2 through 6 for the B-phase and C-phase voltage inputs.
Step 9: (Optional.) Repeat Steps 2 through 7 for Setting Groups 1, 2, and 3.
Overexcitation, Volts/Hertz Trip Time Verification
Step 1: Using
Table 13-45 as a guide, transmit the first row of setting commands to the relay.
Table 13-45. 24 Trip Time Settings
Settings Purpose
S0-24=1.0,0.5,0.0 Sets 24 PU at 1.0 V/H, Trip Time Dial = 0.5, Reset Time Dial = 0.
S0-24=1.0,2.0,0.0 Sets 24 PU at 1.0 V/H, Trip Time Dial = 2.0, Reset Time Dial = 0.
S0-24=1.0,4.0,0.0 Sets 24 PU at 1.0 V/H, Trip Time Dial = 4.0, Reset Time Dial = 0.
Step 2: Connect a 120 Vac, three-phase, 50 or 60-hertz voltage source (depending on user’s nominal
frequency) to Terminals C13 (A-phase), C14 (B-phase), C15 (C-phase), and C16 (Neutral).
Refer to
Figure 13-1 for terminal locations.
Table 13-46. 24 Trip Times
Multiple of V/Hz
Pickup
Time Dial 0.5 Time Dial 2.0 Time Dial 4.0
1.4 3.13 seconds 12.50 seconds 25.00 seconds
1.6 1.34 seconds 5.55 seconds 11.11 seconds
1.8 0.78 seconds 3.13 seconds 6.25 seconds
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