Table of Contents
Advertisement
I.L. 40-385.1B
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
V
=
96.4 120°
AN
∠
V
=
17.3 0°
V
BN
∠
V
=
17.3
–
120°
V
CN
∠
I
=
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 are 5%
for an input current that is 10% above the calcu-
lated value.
Repeat Step 10.The RI2 contacts 1 and 2 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:
6-4
CA
∠
V
V
=
17.3
–
120°
AN
∠
V
=
96.4 120°
V
BN
∠
V
=
17.3 0°
V
CN
∠
I
=
3.33
–
45°
F
• 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. The RI2 contacts 1 and 2 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
example to calculate and determine trip
currents; set the relay as follows:
Z1P = ZIG = 4.5
Z2P = Z2G = 6.0
Z3P = Z3G = 9.0
PANG = GANG = 75 o
a. Single-Phase-to-Ground Fault
Use the equation in Step 10, and the following input
voltages:
∠
V
=
45 0°
=
V
AN
LN
∠
V
=
70
–
120°
BN
∠
V
=
70 120°
CN
leads Van by
a
= 4.2A, in 2.5
a
T1 = 0
T2P= T2G = 0.2
T3P= T3G = 0.3
ZR
= 3
(5/92)
Advertisement
Table of Contents
