Monitoring Of Network Peak Load; Voltage Measurement; Power And Energy Measurement - Advanced Energy Thyro-Power Manager Operating Instructions Manual

For electrical current converters, the load resistance must also be connected externally, and
the voltage converters must be configured accordingly (see also chapter 4.5.4.8 for this).
Generally, the output value can be freely adjusted at each of the six analog outputs; for
standard settings the measurement value 1 is read out to output 1, the measurement value
2 is read out to output 2, and the measurement value 3 is read out to output 3. A change of
standard settings can only be performed via a PC program or via a bus system (see also
chapter 4.5.4.4 for this). The following figure displays the principle structure and the
connection diagram upon use of the ZME function.
Figure 23: Connection diagram for ZME function

6.3.2. MONITORING OF NETWORK PEAK LOAD

For the monitoring of network peak-load, the connecting process of the electrical current
converters is performed in the same manner as with the ZME function (see above). For this,
the three current converters should be located within the supply facility of the monitoring
unit.
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6.3.3. VOLTAGE MEASUREMENT

Strom Strom Strom

6.3.4. POWER AND ENERGY MEASUREMENT

L1 L2 L3
The under-stepping of the set electrical current limiting value is the focus of monitoring and
subsequent reporting. Without deployment of a PC mode, the limiting value is equal for all
three measurement values, and can be set via the Poti R310 (standard setting = 200%).
With deployment of a PC mode, a different limiting value can be set for each of the three
measurement values via the help of a PC program or of a bus system.
If the limiting value is over-stepped, a message occurs at the alarm output (standard
setting), as well as via PC program and via bus system. The message remains as long as
the limiting value is over-stepped, if the value again falls below the limiting value, the
message is also automatically reset.
If the measurement integration time is set to T0 (standard setting for T0 = 1s), the
measurement process is terminated for each T0, and a comparison is then performed. Thus
within the standard setting, the shortest time for a message = 1s, and the shortest time for a
message duration is 1s. Instead of T0, also 1 network period can be set via a PC program or
bus system. This would possibly result in fuzzy displays, yet a message could then be
performed already after 20 ms (at 50Hz).
If voltage converters are deployed instead of electrical current converters, also voltages can
be measured (see also chapter 4.5.4.3 page 9 for this). Voltage converters must then be
designed so that a nominal voltage of 1V~ results on the secondary side. The internal
resistance of the measurement inputs is 7540 Ohms; this information can also be utilized for
voltage converters using an accordingly computed series resistance. The converter type and
the converter sizes may be set via a PC program and bus system.
If one electrical current converter is connected to measurement input 1, and a voltage
converter is connected to measurement input 2, and both are correctly configured via a PC
program and bus system, one may also execute a (single-phase) power and energy
measurement (see also chapter 4.5.4.3). The reset of the energy counter and also of the
operating time counter is possible via a PC program. Furthermore, the third measurement
input can also be used in a random manner.
The following figure displays the actual value window box of the PC program for power and
energy measurements.