Siemens SIPROTEC 7UT613 series, Руководство пользователя

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2.13 Forward Power Supervision
251
7UT613/63x Manual
C53000-G1176-C160-2
broken wire or voltage failure is recognised or voltage transformer protection breaker
failure (via the respective binary input) is indicated (see also Subsection "Technical
Data").
Figure 2-103 Logic diagram of the forward active power supervision
2.13.2 Setting Notes
General The application of forward power monitoring is only possible in 3-phase protected ob-
jects. It can only be assigned to a side of the main protected object or another mea-
suring location. Furthermore, it is a prerequisite that the device is connected to a three-
phase voltage transformer set, that permits a sensible calculation of the active power
with the respective current transformer connection.
The forward power monitoring can only be effective and is only accessible if it has
been set during configuration under address
151 FORWARD POWER
=
Enabled
(sec-
tion 2.1.3).
Under address
5101 FORWARD POWER
the forward power monitoring can be switched
ON
or
OFF
. Furthermore, the command can be blocked during enabled monitoring
function (
Block relay
).
Pickup Values For undershooting of a preset active power and the exceeding of another preset active
power, one pickup value each must be set.
If the forward power monitoring has been assigned to a side of the protected object,
the pickup value can be set directly as reference value (with reference to the nominal