P521/EN AD/B21
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MiCOM P521
3.5.3.7
Protection communication menu
COMMUNICATION
Heading of the COMMUNICATION menu. To gain access
to the Protection Comms menu, press
2
,
6
3 times then
2
and
6
. To gain access to the sub menu points, press
2
.
Protection
Heading of the Protection Comms menu. To gain access
to the Protection Comms menu, press
2
.
Protocol
SDLC
Displays the currently selected protocol for the protection
comms. Select from SDLC, NRZ using
8
or
2
and
enable your choice using
5
.
Data Rate
64k
Displays the speed of protection comms transmission.
Select from: 9.6k, 19.2k, 56k, 64k and 2M bits per second
using
8
or
2
and enable your choice using
5
.
Relay Address
A1
Displays the relays protection comms address. Select
from: A1, A2, A3, B1 etc. through to F3 using
8
or
2
and enable your choice using the
5
key.
Clock Source Ch1
INTERNAL
Displays the source of the protection comms clock. Select
from INTERNAL or EXTERNAL using
8
or
2
and enable
your choice using
5
.
Comm Fail Timer
0 ms
Allows a settable delay for which a comms failure must be
present before an alarm is issued.
Comm Delay Tol
1 ms
Displays the maximum allowable propagation time
variation. Variations greater than the set value will result
in a bias characteristic modification, in order to stabilise
the relay.
Char Mod Time
1 s
Displays the duration the bias characteristic is modified
for, following a variation in the propagation delay greater
than the "Comm Delay Tol".
3.5.4.8
Inverting of the auxiliary output relays
This sub menu makes it possible to invert the state of the individual output relays
during the relay energized condition.
AUTOMAT. CTRL
Heading of the AUTOMAT. CTRL Menu. To gain access to
the Invert Output Relays menu, press
2
,
6
, 6 times,
2
,
followed by
6
9 times.
