Basler BE1-CDS220, Instruction Manual

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13-54 Testing And Maintenance BE1-CDS220
Time Overcurrent
Pickup and Dropout Verification (51/151/251)
Purpose: To verify the accuracy of the operation of the 51/151/251 elements.
Reference Commands: SL-51/151/251, S<n>-51
Step 1. Connect a current source to terminals B1 and B2 (A-phase input 1).
Step 2. To initially prepare the 51/151/251 elements for pickup and dropout testing, send the
commands in Table 13-45 to the relay.
Table 13-45. 51/151/251 Time Overcurrent Test Commands
Command Purpose
A= Gain access
SL-N=NONE Zero out custom logic settings/overwrite with
logic = none settings
Y Confirm overwrite
SL-N= 51 Name custom logic for this test
SL-51=1,0 Enables 51P/51N/51Q, CT input 1
SL-VO1=51PT Enables OUT1 to close for 50P trip
SL-VO2=51NT Enables OUT2 to close for 51N trip
SL-VO3=51QT Enables OUT3 to close for 51Q trip
SG-CT1=1,WYE,NA,0 Input 1 ctr=1, ct=wye, xfmr=na, no grd source
SG-TRIGGER=51PT+
51NT+51QT,51PPU+
51NPU+51QPU,0 Enable 51PT+51NT+51QT to log targets and
trigger fault recording
E Exit
Y Save settings
Step 3. Transmit to the relay the appropriate row of the setting commands S0-51P from Table 13-46. If
your relay is supplied with the HMI option, you may also go to the front panel interface screen
\PROT\SG0\51\51 and edit the 51P, 51N, and 51Q settings.
Table 13-46. Time Overcurrent 51 Element Test Settings
Sensing
Input Type
Phase Neutral Negative Sequence
1 A S0-51P=1.0,0.5,I2 S0-51N=1.0,0.5,I2 S0-51QN=0.33,0.5,I2
5 A S0-51P=5.0,0.5,I2 S0-51N=5.0,0.5,I2 S0-51QN=1.67,0.5,I2
Notes for Table 13-46
1. See Sidebar 13-10 for more information on negative sequence pickup.
Step 4. Slowly ramp up current on the phase A input until OUT1, OUT2, and OUT3 close. Verify that
pickup occurred within the specified accuracy of the relay as listed in Table 13-47
Table 13-47. Time Overcurrent 51 Element Accuracy
Sensing Type Pickup Accuracy - Phase and Neutral
A or B (1 ampere nominal systems)
±
2% of setting or
±
10 milliamperes
D, E, or F (5 ampere nominal systems)
±
2% of setting or
±
50 milliamperes