Input Transformer (Ip) Check - ABB REL 301 Instruction Leaflet

I.L. 40-386.1
Again apply an AG fault. Again the Zone 1 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 volt-
age 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 cur-
rent 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.
"Zone 1Ø"
"Zone 1G"
"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 direc-
tional logic, 3Ø voltages must be applied for correct directional reference. With no voltage ap-
plied or if the setting of Loss -of-Potential Block ("LOP Blk") is "Yes" and at least one input
voltage is zero volts, GB will be non-directional regardless of the GB Dir setting.
This test is to verify the dual polarizing or fourth current transformer input (Ip). For a dual polar-
izing ground directional unit test, connect the test circuit shown in Figure 5-7. Apply I
∠-90° to terminals F
= 70 Vac). Apply I
angle of I
• All angles between -3° and -177°
• Or -90° ± 87°, where -90° could be referred to as the maximum torque angle
When the relay trips, remove the fault current. OTHER and AG LEDs will light. The LCD display
will indicate the fault distance. Using the R
record can be reviewed. See Table 4-3 for a description of the displayed fault data.
5-10
= "Disabled" (Zone 1 phase distance setting)
= "Disabled" (Zone 1 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)
-13 (+) and F
T
= 4A to terminals F
A
relative to I and observe tripping at all of the following angles of I
A p
-12 (-), and apply a balanced 3-phase voltage (V
T
-15 (+) and F -16 (-) to the system under test. Vary the
T T
and L
AISE OWER
P
= V
a
:
A
push-buttons the complete fault
= 1.0A
= V
b c