ABB SPAC 531 C User Manual And Technical Description page 34

Example 4.
34
Feeder terminal SPAC 531 C1 used for the
protection of an outgoing feeder in a one-breaker
system. No auto-reclosures.
The selection of the current component to be
measured by the neutral current protection in
the application illustrated in Fig. 15 is auto-
matically controlled by the auxiliary contacts of
the arc suppression coil (Petersen coil), the
circuit breaker and the truck.
Switch SGB/SPCJ 3C3
1 0 no I> start to AR2
2 0 no I>> start to AR2
3 0 no I>> start to AR1
4 0 no block. BS 1 to t>
5 0 no block. BS 1 to t>> 0 no block. BS 1 to t>>
6 0 no block. BS 2 to t>
7 0 no block. BS 2 to t>> 0 no block. BS 2 to t>> 0 no TRIP sign. to
8 0 not in use
With above SGB and SGR switch 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 I> or I>> trip
X2/1-2-3 Signal for final Iϕ>, Iϕ>> trip
X2/4-5-6 I>> start and blocking signal to phase overcurrent modules 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)
X3/13-14 CB closing
In example 4 the AR parameters can be set as in
example 1. The function of the contacts for CB
Parameter Value Function
S78 0 Inhibits AR functions
V151 1 Stores the set parameter
Automatic shifting of the characteristic angle of
the directional neutral overcurrent module
(SPCS 3C4) is selected by turning switch SG1/2
on the front panel of the module into position 1.
The switches on the PC boards of the relay
modules have been set as follows:
SGB/SPCS 3C4
0 no 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 to TRIP output
0 no block. BS 1 to t>
0 no block. BS 2 to t>
0 not in use
closing and opening 2 is determined by the
configuration of the control module.
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