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.
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:
Example 4.
Switch
SGB/SPCJ 3C3
SGB/SPCS 3C4
SGR
1
0 no I> start to AR2
0 no I
ϕ
> start to AR3
0 no I> start to SIGNAL 3
2
0 no I>> start to AR2
0 no I
ϕ
>> start to AR3
1 I> and I>> trip to
SIGNAL 1
3
0 no I>> start to AR1
0 no I
ϕ
>> start to AR1
1 I
ϕ
> trip to TRIP output
4
0 no block. BS 1 to t>
0 no block. BS 1 to t>
0 not in use
5
0 no block. BS 1 to t>> 0 no block. BS 1 to t>>
0 not in use
6
0 no block. BS 2 to t>
0 no block. BS 2 to t>
0 not in use
7
0 no block. BS 2 to t>> 0 no block. BS 2 to t>> 0 no TRIP sign. to
SIGNAL 1
8
0 not in use
0 not in use
0 no TRIP sign. to
SIGNAL 2
With above SGB and SGR switch settings the
output contacts of feeder terminal SPAC 531
C1 have the following functions:
In example 4 the AR parameters can be set as in
example 1. The function of the contacts for CB
closing and opening 2 is determined by the
configuration of the control module.
Contact
Function
X1/3-4
Opening 1 of CB (I>, I>>, I
ϕ
>, I
ϕ
>>)
X1/6-7
Signal for final I> or I>> trip
X2/1-2-3
Signal for final I
ϕ
>, I
ϕ
>> trip
X2/4-5-6
I>> start and blocking signal to phase overcurrent modules of incoming
feeder cubicle
X2/7-8-9
I
ϕ
> 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
Parameter
Value
Function
S78
0
Inhibits AR functions
V151
1
Stores the set parameter