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"Dir Type"
"GB Type"
Test Using Blocking System
Apply an AG fault as described in Step 6 above. The REL 302 should not trip.
Apply rated dc voltage to terminals TB4-9(+) and TB4-10(-). Again apply an AG fault
as described in Step 6 above. When the relay trips, remove the fault current. PILOT
and AG LED's will light. The LCD display will switch to the L-FLT mode and fault dis-
tance will be displayed. Using the RAISE and LOWER push-buttons the complete fault
record can be reviewed. See Table 4-3 for a description of the displayed fault data quan-
tities.
The significant quantities to review are:
Fault Type
Targets
Fault Voltages (VA, VB, VC, 3V0) and Currents (IA, IB, IC, 3I0)
Pressing the front panel RESET push-button will cause the LCD display to switch to
the METER display and the LEDs will stop flashing.
STEP 13
Receiver Inputs 1 and 2
Apply rated dc voltage to terminals TB4-9(+) and TB4-10(-) for tests a and b below.
a.
Blocking System Test
Apply an AG fault as described in Step 6. The REL 302 should trip. When the relay
trips, remove the fault current. PILOT and AG LEDs will light. The LCD display will
switch to the L-FLT mode and fault distance will be displayed. Using the RAISE
and LOWER push-buttons the complete fault record can be reviewed. See Table 4-
2 for a description of the displayed fault data quantities.
The significant quantities to review are:
Fault Type
Targets
Fault Voltages (VA, VB, VC, 3V0) and Currents (IA, IB, IC, 3I0)
Pressing the front panel RESET push-button will cause the LCD display to switch
to the METER display and the LEDs will stop flashing.
Applying rated dc voltage to terminals TB4-11(+) and TB4-12(-) simulates the re-
ceipt of a pilot blocking signal. Again apply an AG fault as described in Step 6. The
REL 302 should not trip. Remove voltage from terminals TB4-11 and TB4-12.
Receipt of the pilot signal can also be simulated from the front panel. Using the
procedure outlined in Step 5, press the SELECT push-button until the "TEST"
mode is selected. Displayed is the result of the self-test routine which should show
a normal status, "Status" "0".
(10/94)
=
"Zero sequence" (Directional overcurrent polarization choice setting)
=
"Disabled" (Overcurrent ground backup curve family setting)
— "FLT Type" "AG"
— "Pilot G" "YES"
— "FLT Type" "AG"
— "Pilot G" "YES"
I.L. 40-386.3
5-13
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