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System frequency (Add 063)
In the UMG96S the system frequency is deter-
mined from the measuring-circuit voltage of
phase L1. The scanning frequency for the cur-
rent and voltage inputs is then calculated from
the system frequency.
In the event of measurements with severely dis-
torted voltages, the frequency of the fundamen-
tal voltage component can no longer be deter-
mined with sufficient accuracy. Voltage distor-
tions occur e.g. during measurements in con-
sumers, which are operated with a generalised
phase control.
The corresponding system frequency should be
specified as a fixed value for measuring-circuit
voltages with severe distortions. Current distor-
tions do not affect the frequency determination.
If the measuring-circuit voltage is missing, it is
not possible to determine the system frequency
and therefore neither can a scanning frequency
be calculated. The acknowledgeable error mes-
sage “500” appears. Voltage, current and all
other resulting values are not calculated and
are displayed as zero.
If the current is to be measured, even without a
measuring-circuit voltage, the system fre-
quency must be preselected as a fixed fre-
quency at the UMG96S.
Determination of the system frequency can op-
tionally be determined automatically or be pro-
grammed as a permanent, fixed value. The fol-
lowing settings are available for determination
of the system frequency:
0 - Automatic frequency determination
1 - Fixed frequency default value of 50Hz
2 - Fixed frequency default value of 60Hz
Active power demand
The UMG96S has four work meters. Three ac-
tive power demand counters and one reactive
power demand counters.
Total active
power
HT/Imported
supply
Total active
power
The
active power demand counters
at Add
422 and Add 424 can either record incoming
supply and supply or HT and LT.
The switchover between incoming supply/sup-
ply and HT/LT is achieved via one of the digital
inputs (option). In the default factory setting the
active power demand counters record the im-
ported and the delivered active power.
If one of the digital inputs is programmed for
HT/LT switchover, the active power demand
counters no longer record the imported and de-
livered active power, but instead the active
power demand during the HT (high tariff) and
LT (low tariff) time. The HT/LT switchover takes
place via Address 071.
Add 071 = 0 => Active power demand counter
LT
active.
Add 071 = 1 => Active power demand counter
HT
active.
Add Name
416 Total active power demand (without return block)
418 Total reactive power demand (inductive)
422 Total active power demand (imported or HT)
424 Total active power demand (supply or LT)
L1
L2
L3
K1
K2
kWh
L1
L2
L3
K1
K2
kWh
The active power demand displayed in this ex-
ample is: 12 345 678 kWh
The active power demand displayed in this ex-
ample is: 134 192 kWh
Содержание UMG 96S 24V
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