Siemens SIPROTEC 7UT613 series, Руководство пользователя

Страница: 285 / 638

2.19 Monitoring Functions
285
7UT613/63x Manual
C53000-G1176-C160-2
7UT613/63x this applies to forward power supervision P< and the undervoltage pro-
tection.
2.19.1.4 Setting Notes
Measured Value
Monitoring The sensitivity of the measured value monitoring can be changed. Default values are
set at the factory, which are sufficient in most cases. If especially high operating asym-
metry in the currents and/or voltages is to be expected for the application, or if it
becomes apparent during operation that certain monitoring functions activate sporad-
ically, then the setting should be less sensitive.
The current symmetry supervision can be switched
ON
or
OFF
in address
8101
BALANCE I
, the voltage supervision (if available) in address
8102 BALANCE U
.
The current phase sequence can be switched
ON
or
OFF
in address
8105 PHASE
ROTAT. I
; the voltage sequence monitoring (if available) in address
8106 PHASE
ROTAT. U
.
In address
8104 SUMMATION U
the voltage sum monitoring
ON
or
OFF
can be set (if
available).
Address
8111 BAL. I LIMIT M1
determines the threshold current for measuring
location 1 above which the current balance supervision is effective. Address
8112
BAL. FACT. I M1
is the associated symmetry factor; that is, the slope of the sym-
metry characteristic curve. In order to avoid activation during short-term asymmetries,
the monitoring is delayed at address
8113 T Sym. I th. M1
. This parameter can
only be set with DIGSI at Additional Settings . The time delay usually amounts to a
few seconds.
The same considerations apply for the further measuring locations, as far as they are
available and allocated:
Address
8121 BAL. I LIMIT M2
,
8122 BAL. FACT. I M2
and
8123 T Sym. I
th. M2
for measuring location 2,
address
8131 BAL. I LIMIT M3
,
8132 BAL. FACT. I M3
and
8133 T Sym. I
th. M3
for measuring location 3,
address
8141 BAL. I LIMIT M4
,
8142 BAL. FACT. I M4
and
8143 T Sym. I
th. M4
for measuring location 4,
address
8151 BAL. I LIMIT M5
,
8152 BAL. FACT. I M5
and
8153 T Sym. I
th. M5
for measuring location 5.
Address
8161 BALANCE U-LIMIT
determines the threshold voltage above which the
voltage balance supervision is effective. Address
8162 BAL. FACTOR U
is the asso-
ciated symmetry factor, i.e. the slope of the symmetry characteristic curve (if voltages
available). In order to avoid activation during short-term asymmetries, the monitoring
is delayed at address
8163 T BAL. U LIMIT
. This parameter can only be set with
DIGSI at Additional Settings . The time delay usually amounts to a few seconds.
In address
8401 BROKEN WIRE
the broken wire monitoring can be enabled or dis-
abled.
Asymmetrical mea-
sured voltage
failure (Fuse-failure
monitor) The settings for the fuse failure monitor for single-phase measuring voltage failure (ad-
dress
8426 FFM U<max (3ph)
) are to be selected so that reliable activation occurs
if a phase voltage fails and no false activation occurs during ground faults. Addresses
8422 FFM I< M1
,
8423 FFM I< M2
and
8424 FFM I< M3
must be set for the re-