occurs after the
Event delay
setting. A common three-position status is indicated at
variable POSITION.
Table 1485: Status indication for a three-position switch based on auxiliary contacts
Status Inputs Outputs
POSITIO
N
DCPOSCL
OSE
DCPOSO
PEN
ESPOSCL
OSE
ESPOSOP
EN
REED DCCLOSE
_POS
DCOPEN_
POS
ESCLOSE
_POS
ESOPEN_
POS
OKPOS
Discon-
nector
closed
1 0 0 1 x 1 0 0 1 1
Discon-
nector in-
termedi-
ate
0 0 0 1 x 0 0 0 1 0
Both
open
0 1 0 1 x 0 1 0 1 1
Earthing
switch in-
termedi-
ate
0 1 0 0 x 0 1 0 0 0
Earthing
switch
closed
0 1 1 0 1
1
0 1 1 0 1
Faulty 0 1 1 0 0
2
0 1 0 0 0
Faulty 0 1 1 1 x 0 1 0 0 0
Faulty 1 1 0 1 x 0 0 0 1 0
Faulty 1 x 1 x x 0 0 0 0 0
Faulty x 0 x 0 x 0 0 0 0 0
x = no difference
The REED input is only supervised during a short time window when earthing switch
has closed and if
Reed contact
setting is set as "Available".
9.3.5 Application
In the field of distribution and sub-transmission automatic, reliable control and
status indication of primary switching components both locally and remotely is of
significant importance. They are needed especially in modern remotely controlled
substations.
P3SSXSWI is designed to be used for status indication of a three-state (earthing
switch closed, disconnector closed and both open) switch.
9.3.6 Signals
1
REED input has been detected as closed within time-out and earthing switch is indicated as
closed.
2
REED input has not been detected as closed within time-out and faulty position is indicated.
1MRS759142 F Control functions
REX640
Technical Manual
1537
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