sending of signals, the timer
tCoord
should be set to 10-30 ms dependant on type of
communication channel.
The general requirement for teleprotection equipment operating in intertripping applications
is that it should be very secure and very dependable, since both inadequate security and
dependability may cause unwanted operation. In some applications the equipment shall be
able to receive while transmitting, and commands may be transmitted over longer time period
than for other teleprotection systems.
14.1.3 Setting guidelines
IP15021-1 v1
M13869-4 v4
The parameters for the scheme communication logic function are set via the local HMI or
PCM600.
Configure the zones used for the CS send and for scheme communication tripping by using
the ACT configuration tool.
The recommended settings of
tCoord
timer are based on maximal recommended transmission
time for analogue channels according to IEC 60834-1. It is recommended to coordinate the
proposed settings with actual performance for the teleprotection equipment to get optimized
settings.
14.1.3.1 Blocking scheme
M13869-8 v4
Set
Operation
=
On
Set
SchemeType
=
Blocking
Set
tCoord
25 ms (10 ms + maximal transmission time)
Set
tSendMin
= 0 s
Set
Unblock
=
Off
(Set to
NoRestart
if Unblocking scheme with no alarm for loss of guard is
to be used.
Set to
Restart
if Unblocking scheme with alarm for loss of guard is to be
used)
Set
tSecurity
= 0.035 s
14.1.3.2 Delta blocking scheme
GUID-F4359690-F433-46CB-A173-8C14559E3FCF v1
Set
Operation
=
On
Set
SchemeType
=
DeltaBlocking
Set
tCoord
= 0 s
Set
tSendMin
= 0 s
Set
Unblock
=
Off
(Set to
NoRestart
if Unblocking scheme with no alarm for loss of guard is
to be used.
Set to
Restart
if Unblocking scheme with alarm for loss of guard is to be
used)
Set
tSecurity
= 0.035 s
Set
DeltaI
= 10 %IB
Set
DeltaU
= 5 %UB
Set
Delta3I0
= 10 %IB
Set
Delta3U0
= 5 %UB
Section 14 1MRK 511 358-UEN A
Scheme communication
346
Application manual
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