ABB MDAR Instruction Manual page 76

V
F
I = ------------------------------------------------------ -
(
2Z cos PANG X
1P
From Table A-1:
Ω
• Z = 4.5
1P
• PANG = 75 °
For Y-connection only, current (IA) required to trip =
3.33A ±5%, with an angle of -45°, because Ian has
already lagged V (V ) by 30°. Review all targets.
F ab
NOTE: The accuracy of the voltage reading in the
metering mode is between 1 and 77
Vrms. The inaccurate reading on V
will not affect the results of the test.
The reclose contacts (RI2-1 and RI2-2) should be
closed for setting of TTYP = 2PR or 3PR, and should
be open for TTYP = OFF or 1PR.
Step 14. Repeat Step 13 for both BC and CA faults.
Use the following voltages for each fault type:
BC
∠
V = 96.4 120°
V
AN
∠
V = 17.3 0°
V
BN
∠
V = 17.3 – 120°
V
CN
∠
= 3.33 – 45°
F
1.1.6 Zone 2 Tests
Step 15. Press the DISPLAY SELECT pushbutton
until the SETTINGS mode LED is displayed.
Change the setting values to:
• Z1P = "OUT" (Zone 1 phase value)
• Z1G = "OUT" (Zone 1 ground distance)
= 4.5 Ω
• Z2P (Zone 2 phase value)
• T2P = 1.0 sec (Zone 2 phase timer)
= 4.5 Ω
• Z2G (Zone 2 ground value)
• T2G = 1.5 sec (Zone 2 ground timer)
• Z2RI = "YES" (Zone 2 reclosing)
• TTYP = "3PR" (Reclosing mode)
Step 16. Perform Steps 10 thru 14 (above) for
Zone 2 only, using delayed trip times according
to the zone 2 phase timer (T2P), and the Zone 2
ground timer (T2G). Tolerances for T2P and T2G
)
–
CN
CA
∠
V = 17.3 – 120°
V
AN
∠
V = 96.4 120°
V
BN
∠
V = 17.3 0°
V
CN
∠
= 3.33 – 45°
F
are 5% for an input current that is 10% above the
calculated value.
Repeat Step 10.
should be closed, and the RB contacts 1 and 2
should be open. Reset Z2RI to "NO".
Repeat Step 10 again. The RI2 contacts 1 and 2
should be open and the RB contacts 1 and 2
should be closed.
Change the settings of T2G and T2P to BLK.
Zone 2 should not be tripped for any type of fault.
1.1.7 Zone 3 Tests
Step 17. Press the DISPLAY SELECT pushbutton
until the SETTINGS mode LED is displayed.
Change the setting values to:
• Z2P = "OUT" (Zone 2 phase value)
• Z2G = "OUT" (Zone 2 ground distance)
= 4.5 Ω (Zone 3 phase value)
• Z3P
• T3P = 2.0 sec (Zone 3 phase timer)
= 4.5 Ω (Zone 3 ground value)
• Z3G
• T3G = 2.5 sec (Zone 3 ground timer)
• Z3FR = "FWD" (Zone 3 direction)
• Z3RI = "YES" (RI = Z3T)
• TTYP = "3PR" (Reclosing Mode)
Step 18. Perform preceding steps 10 thru 14 for
Zone 3 only, using delayed trip times according
to the Zone 3 phase timer (T3P), and the Zone 3
ground timer (T3G). Tolerances for T3P and T3G
are ± 5% for an input current that is 10% above
the calculated value.
Repeat Step 10.
should be closed, and the RB contacts 1 and 2
should be open. Reset Z3RI to "NO".
Repeat Step 10 again. The RI2 contacts 1 and 2
should be open and the RB contacts 1 and 2
should be closed.
Step 19. Set Z3FR = REV, then repeat Step 10, ex-
cept apply AG reversed fault (i.e., I
105°). The relay should trip, at I
seconds. Reset Z3FR to "FWD".
NOTE: For customers who use a computer to
test the relays, or use their own settings
for maintenance, refer to the following
I.L. 40-385.5
The RI2 contacts 1 and 2
The RI2 contacts 1 and 2
leads Van by
a
= 4.2A, in 2.5
a
A-4