Basler BE1-CDS220, Instruction Manual

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13-46 Testing And Maintenance BE1-CDS220
Step 1. Connect one current source to terminals B1, B2 (A-phase, input 1) and a second current
source to terminals B9, B10 (A-phase, input 2).
Step 2. Send the commands listed in Table 13-33 to the relay to setup a test of the response time of
the 87 unrestrained elements.
Table 13-33. Unrestrained Element Response Time 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=DIFF Sets DIFF as custom logic name
SL-87=1,0 Enables 87
SL-VO1=87UT Enables OUT1 to close with 87 unrestrained trip
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=87UT,87UT,0 Enable 87UT to log and trigger fault recording
S#-TAP87=MANUAL,2.00,2.00 set tap 1=2.00 and tap 2=2.00
S#-87=0,15,0,0,2,1 Minpu = 0, slope = 15%, 2
nd
= disabled, 5
th
= disabled,
URO = 2 times TAP unrestrained pickup, 2
nd
harm
sharing = shared
E Exit
Y Save settings
Step 3. Apply 1 multiple of tap current (2 amperes) to both A-phase input 1 and A-phase input 2 (at
180
o
phase relation to input 1).
Step 4. To force an unrestrained trip at 1.5 times pickup, you must apply a step change in the current
on input 2 to 8.0 amps. Apply step change in current to input 2 and record the time interval
between the time the step change was initiated to the time OUT1 output contact closes (the
unrestrained trip (87UT)).
Step 5. Reduce the current to input 2 until OUT1 contact opens.
Step 6. Apply 1 multiple of tap current (2 amperes) to both A-phase input 1 and A-phase input 2 (at
180
o
phase relation to input 1).
Step 7. To force an unrestrained trip at 5 times pickup, you must apply a step change in the current on
input 2 to 22 amperes.
Step 8. Apply step change in current to input 2 and record the time interval between the time the step
change was initiated to the time OUT1 output contact closes (the unrestrained trip (87UT)).
Step 9. Reduce the current to input 2 until OUT1 contact opens.
Step 10. The time measured in Steps 4 and 8 should be less than those shown in Table 13-34.
Table 13-34. Restrained Trip Operate Times
Function Differential current Time
Unrestrained trip 1.5 times pu Less than 2 cycles
Unrestrained trip 5 times pu Less than 1 cycle
Step 11. (Optional) Repeat steps 1 through 10 for phases B and C.