ABB SPAC 531 C User Manual And Technical Description page 25

The SG1 switchgroups on the front plates of the
measuring relay modules and the control mod-
Switch SG1/SPCJ 3C3
1 0
}
t> = 0.05...1.00 s
2 0
3 0 definite time oper.
4 0 no self-holding
5 0 no I>> doubling
6 0 I>> = 2.5...20 x I
7 0
}
t>> = 0.04...1.00 s
8 0
Checksum = 0
The SGB switches on the PC boards of the
measuring relay modules and the SGR switches
Switch SGB/SPCJ 3C3
1 1 I> start to AR2
2 0 no I>> start to AR2
3 1 I>> start to AR1
4 0 no block. BS 1 to t>
5 0 no block. BS 1 to t>>
6 0 no block. BS 2 to t>
7 0 no block. BS 2 to t>>
8 0 not in use
With above SGB and SGR settings the output
contacts of feeder terminal SPAC 531 C1 have
the following functions:
Contact Function
X1/3-4 Opening 1 of CB (I>, I>>, Iϕ>, Iϕ>>)
X1/6-7 Signal for final trip (I> and I>>)
X2/1-2-3 Signal for final trip (Iϕ> and Iϕ>>)
X2/4-5-6 I>> start and blocking to overcurrent module of incoming feeder cubicle
X2/7-8-9 Iϕ> start
X1/8-9-10 Self-supervision alarm (IRF)
X3/11-12 Opening 2 of CB (local control, remote control, AR)
X3/13-14 CB closing
The function of the contacts for CB opening 2
and closing 2 is determined by the configuration
of the control module.
In the example illustrated in Fig. 11 the overcur-
rent module U1 (SPCJ 3C3) operates as the
overcurrent and short circuit protection of the
outgoing feeder. The setting of the low-set cur-
rent stage extends to the range of the high-set
stage. The high-set overcurrent stage operates
ule shown in the example in Fig. 11, can be set
in accordance with the following table.
SG1/SPCS 3C4
0 Iϕ>> forward dir.
0
}
Isinϕ,manual select.
1
0 no self-holding
1 t> = 1...10 s
0 Iϕ>> = 5...40% x I
n
0
}
U = 10 % x U
0
1
Checksum = 148
at the front edge of the I/O module SPTR 6B11
are to be set as follows:
SGB/SPCS 3C4
1 Iϕ> start to AR3
0 no Iϕ>> start to AR3 1 I> and I>> trip to
0 no Iϕ>> start to AR1 1 Iϕ> trip toTRIP output
0 no block. BS 1 to t>
0 no block. BS 1 to t>>
0 no block. BS 2 to t>
0 no block. BS 2 to t>> 0 no TRIP sign. to
0 not in use
for short circuits occurring near the substation.
If the feeder is provided with branch circuit
breakers near the substation, it may be necessary
to delay the high-set stage, too, in order to
obtain time grading. Current asymmetry, if any,
may be disregarded when the current setting is
determined, because due to the peak-to-peak
measurement method employed, asymmetry will
not increase the sensitivity of the protection.
SG1/SPTO 6D3
0 blockings operative
0 AR in use
n
n
SGR
0 no I> start to SIGNAL 3
SIGNAL 1
0 not in use
0 not in use
0 not in use
SIGNAL 1
0 no TRIP sign. to
SIGNAL 2
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