Direct Command / Blocking; Sync Function Groups - Siemens siprotec SJ62 User Manual

2 Functions

2.19.1.5 Direct Command / Blocking

2.19.1.6 SYNC Function Groups

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The associated messages indicating the release via the corresponding condition are
as follows: „25 V1> V2<", „25 V1< V2>" and „25 V1< V2<".
Via binary input „>25 V1>V2<", „>25 V1<V2>" and „>25 V1<V2<" release con-
ditions can be issued externally provided the synchrocheck is controlled externally.
Parameter TSUP VOLTAGE (address 6111) can be set to configure a monitoring time
which requires above stated release conditions for de-energized connection to be ful-
filled at least this time before switching is allowed.
Parameter Direct CO can be set to grant a release without performing any checks.
In this case switching is released immediately when initiating the synchrocheck. It is
obviously not reasonable to combine Direct CO with other release conditions.
If the synchrocheck fails, depending on the type of failure a direct command bypassing
any checks may be issued or not (also see "Plausibility check / SYNC Error").
Via binary input „>25direct CO" this release can also be granted externally.
Blocking the entire synchrocheck is possible via binary input „>BLK 25-1". The
message signaling this condition is made via „25-1 BLOCK". When blocking the
measurement is terminated and the entire function is reset. A new measurement can
only be performed with a new measurement request.
Via binary input „>BLK 25 CLOSE" it is possible to only block the release signal for
closing („25 CloseRelease"). When blocking is active, measurement continues.
The blocking is indicated by the message „25 CLOSE BLK". When blocking is reset
and release conditions are fulfilled, the release signal for closing is issued.
The 7SJ64 relay comprises 4 SYNC function groups (SYNC function group 1 to 4)
whereby each group contains all setting parameters required by a SYNC function. This
generally includes the switchgear component for which the SYNC function settings are
to be applied.
However, several SYNC function groups may be used for one point of synchroniza-
tion/switching object if synchronismn is to be performed with different parameters. Al-
location of switchgear component and SYNC function group must then be accom-
plished dynamically (whichever is the function group to operate with) via one of the
binary inputs from „>25-1 act" to „>25-4 act".
If the assignment to the SYNC groups is clear, the binary inputs are not required.
Selecting one SYNC function group several times, causes output of error message
(„25 FG-Error").
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015