Basler BE1-CDS220, Instruction Manual

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BE1-CDS220 Testing And Maintenance 13-43
Table 13-29. Second Harmonic Restraint Elements Setup Commands
Command Purpose
A= Gain access
SL-N=NONE Zero out custom logic settings/overwrite with logic =
none settings
Y Confirm overwrite
SL-N=2HAR Sets 2HAR as custom logic name
SL-87=1,0 Enables 87
SL-VO1=87RT Enables OUT1 to close with 87 restrained trip
SL-VO2=2NDHAR Enables OUT2 to close when 2
nd
harmonic restrains
87RT
SG-CT1=1,WYE,NA,0 ctr=1, ct=wye, xfmr=na, no grd source
SG-CT2=1,WYE,NA,0 ctr=1, ct=wye, xfmr=na, no grd source
SG-TRIGGER=87RT,87RPU,0 Enable 87RT to log and trigger fault recording
S#-TAP87=MANUAL,2.00,3.80 set tap 1=2.00 and tap 2=3.80
S#-87=0.35,15,18,0,0,1 Minpu = 0.35, slope = 15% ,2
nd
= 18%, 5
th
= disabled,
URO = disabled, 2
nd
harm sharing = shared
E Exit
Y Save settings
Step 3. Apply 2.0 amps of 60 Hz current to the A-phase input 1. The OUT1 (87RT restrained trip)
output contact should close upon application of current.
Step 4. Apply 120 Hz current on the source paralleled to A-phase input 1 and slowly increase the
current from zero until OUT2 closes (and conversely, OUT1 opens).
Step 5. Record the current magnitude from Step 4 that caused OUT 2 to close and OUT1 to open.
These output contact changes indicated that the 2
nd
harmonic restraint function is now
restraining the 87RT operation.
Step 6. Remove both 60 Hz and 120 Hz currents.
Step 7. To arrive at a 2
nd
harmonic inhibit percentage value, divide the magnitude of the applied 2
nd
harmonic current (120 Hz) by the magnitude of the applied 60 Hz input current. For this
particular test, this value should be equal to 0.36 amperes @ 120 Hz
÷
2 A @ 60 Hz = 18 %.
Verify that the 2
nd
harmonic inhibit function restrains operation at the expected value based on
settings from Step 2.
Step 8. (Optional) Repeat steps 2 through 7 for phases B and C. Because the relay was set for
harmonic sharing in the S#-87 command (the last ‘1’ in the string) in Step 2, the harmonic
content on all phases is shared, or summed, and this magnitude is used by the second
harmonic comparators for each phase. Thus, the same operation will occur regardless of which
phase of the 120 hertz test current is applied.
Step 9. (Optional) Repeat Steps 2 through 8 for setting groups 1 through 3 using the CS/CO-GROUP
command to change setting groups.
Fifth Harmonic Restraint Verification
Purpose: To verify the operation of the 5
th
harmonic restraint function of the 87 element.
Reference Commands: SL-87, S(n)-87, S(n)-TAP87, SL-VO, SG-CT