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-
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