Functions
2.3 Directional Overcurrent Protection 67, 67N
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
117
Internal Control Function
The manual closing information must be allocated via CFC (interlocking task-level) using the CMD_Information
block, if the internal control function is used.
Figure 2-34 Example for the generation of a manual close signal using the internal control function
Note
For an interaction between the automatic reclosing function (79 AR) and the control function, an extended CFC
logic is necessary. See margin heading „Close command: Directly or via Control“ in the Setting Notes of the
automatic reclosing function (Section 2.14.6).
Interaction with Automatic Reclosure Function (phases)
When reclosing occurs, it is desirable to have high speed protection against faults with 67-2. If the fault still
exists after the first reclosing, the elements 67-1 or 67-2 will be initiated with graded tripping times, that is, the
67-2 elements will thus be blocked. At address 1514 67-2 active it can be specified whether the 67-2 ele-
ments should be influenced by the status of an internal or external automatic reclosing device or not. The
setting with 79 active means that the 67-2 elements are only released if the automatic reclosing function
is not blocked. If this is not desired, the setting always is selected so that the 67-2 elements are always active
as configured.
The integrated automatic reclosing function of 7SJ62/64 also provides the option to individually determine for
each time overcurrent element whether instantaneous tripping, i.e. normal time delayed tripping unaffected by
the automatic reclosing, or blocking shall take place (see Section 2.14).
Interaction with Automatic Reclosing Function (ground)
When reclosing occurs, it is desirable to have high speed protection against faults with 67N-2. If the fault still
exists after the first reclosing, the elements 67N-1 or 67N-TOC must operate with graded tripping times, i.e. the
67N-2 elements will be blocked. At parameter 1614 67N-2 active it can be specified whether the 67N-2
elements should be influenced by the status of an internal or external automatic reclosing device or not. The
setting with 79 active means that the 67N-2 elements are only released if the automatic reclosing function
is not blocked. If this is not desired, the setting always is selected so that the 67N-2 elements are always active
as configured.
The integrated automatic reclosing function of 7SJ62/64 also provides the option to individually determine for
each time overcurrent element whether instantaneous tripping, i.e. normal time delayed tripping unaffected by
the automatic reclosing, or blocking shall take place (see Section 2.14).
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