ABB REL301 Instruction Manual page 117

I.L. 40-386.3
5.1.5 Input Opto-Coupler Check (Also see Step 12)
STEP 8
External Reset
Apply an AG fault as described pin Step 6 above. As stated the Zone1 and AG LEDs
will light and begin flashing. The LCD display will switch to the L-FLT mode and fault
distance will be displayed. Pressing the front panel RESET push-button will cause the
LCD display switch to the METER display and the LED's to stop flashing.
Again apply an AG fault. Again the Zone1 and AG LEDs will light and begin flashing.
The LCD display will switch to the L-FLT mode and fault distance will be displayed.
Apply rated dc voltage to terminals TB4-7(+) and TB4-8(-). The LCD will display "FLT
Type", all fault data will be erased and the LED's will stop flashing. Remove the voltage
from TB4-7 and TB4-8.
STEP 9
52b Input
Using the MMI change the setting of "CIF Trip" from "No" to "Yes" using the procedure
in Step 4 above. Apply an AG fault as described in Step 6 above, except with a current
of 2 Amp at an angle of 75° lagging the fault voltage. The relay should not trip.
Apply rated dc voltage to terminals TB4-5(+) and TB4-6(-). Again apply an AG fault
with a current of 2 Amp at an angle of 75° lagging the fault voltage. The relay should
trip and a review of the target should show "CIF Trip" "Yes". Remove the voltage from
TB4-5 and TB4-6. Change the setting of "CIF Trip" from "Yes" to "No".
5.1.6 Input Transformer (Ip) Check
STEP 10
Change the following settings using the procedure in Step 3 above.
"Zone1Ø"
"Zone1G"
"Dir Type"
"GB Type"
"GBPickup"
"GBTCurve"
"GB Dir"
Since the "GB Dir" = "YES", the Ground Backup logic is directional, torque controlled
and is supervised by Forward Directional Overcurrent Ground (FDOG) logic. In order
to test the directional logic, 3Ø voltages must be applied for correct directional refer-
ence. With no voltage applied or if the setting of Loss -of-Potential Block (LOPB) is YES
and at least one input voltage is zero volts, GB will be non-directional regardless of the
GB Dir setting.
5-10
Fault Type – "FLT Type" "CG"
Targets – "Zone1G" "Yes"
Fault Voltages (VA, VB, VC, 3V0) and Currents (IA, IB, IC, IP)
= "Disabled" (Zone1 phase distance setting)
= "Disabled" (Zone1 ground distance setting)
= "Dual Polariz" (Directional overcurrent polarization choice setting)
= "CO-8" (Overcurrent ground backup curve family setting)
= "0.5 Amps" (Overcurrent ground backup pickup setting)
= "24" (Overcurrent ground backup curve selection setting)
= "YES" (Overcurrent ground backup directional choice setting)
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