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STEP 7
Using the test connections shown in Figures 5-5 and 5-6, repeat Step 6 above for B phase-to-
ground (BG) and C phase-to-ground (CG) faults respectively. The test voltages are shown be-
low:
For BG fault test, make connections as shown in Figure 5-5 and adjust the voltages as follows:
Apply current to the B phase current input as shown. The current required to trip is 4.00 amps
± 5% at an angle of 75° lagging the fault voltage.
When the relay trips, remove the fault current. Zone 1 and BG LED's 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 quantities.
The significant quantities to review are:
For CG fault test make connections as shown in Figure 5-6 and adjust the voltages as follows:
Apply current to the C phase current input as shown. The current required to trip is 4.00 Amps
± 5% at the angle of 75° lagging the fault voltage.
When the relay trips, remove the fault current. Zone 1 and CG LED's will light. The LCD display
will indicate the fault distance. Using the R
record can be reviewed. See Table 4-4 for a description of the displayed fault data quantities.
The significant quantities to review are:
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 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. Pressing the front panel R
"METER" display and the LED's to stop flashing.
V
= 70 ang 0°
A
V
= V
= 30 ang -120°
B
F
V
= 70 ang 120°
C
Fault Type – "FLT Type" "BG"
Targets – "Zone1G" "Yes"
Fault Voltages (VA, VB, VC, 3V0) and Currents (IA, IB, IC, IP)
V
= 70 ang 0°
A
V
= 70 ang -120°
B
V
= V
= 30 ang 120°
C
F
Fault Type – "FLT Type" "CG"
Targets – "Zone1G" "Yes"
Fault Voltages (VA, VB, VC, 3V0) and Currents (IA, IB, IC, IP)
ESET
and L
push-buttons the complete fault
AISE
OWER
and L
push-buttons the complete fault
AISE
OWER
push-button will cause the LCD display switch to the
I.L. 40-386.1
5-9
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