Application - Siemens SICAM Q80 Operating Instruction

Application

E-11
7 Application
SICAM Q80 7KG8080 is a IEC 61000-4-30 Ed. 2 class A measurement device for integral measurement of power
quality. It encompasses all important quantities for the assessment of electrical supply networks at once. The user
software serves the purposes of rigging the device, taking measurements with online monitoring and composing a
report of the quality analysis.
SICAM Q80 7KG8080 enables you to measure on up to 4 differently configured leads with a resolution extending up
to the 50 th harmonic.
You can devise a variety of trigger mechanisms for long-term monitoring of events.
Along with the conventional trigger mechanisms which respond to the signal exceeding limit values which can be set,
it is also possible to set triggering conditions representing the signal deviating significantly from the expected curve
shape. Thus, as an example, any sudden signal deviations occurring during long-term monitoring which are due to
harmonics or brief voltage fluctuations (spikes) can be captured even if the magnitude of the deviation is much
smaller than the nominal value itself.
The long-term monitoring technique of measurements returns results with the following attributes: independent of
the option of triggered measurement mentioned previously, all relevant measurement data are recorded. SICAM Q80
7KG8080 provides you with the ability to decide after the measurement what limits you wish to set for which quantity,
and thus what to consider in the evaluation of results. The incoming data are converted online by the signal processor
to useful information for the user. The data volume is reduced to the minimum necessary. This avoids the danger of
losing record of relevant events which lie inside the boundaries.
Wherever Complete Recording isn't possible, the European standard EN50160 forms the basis for proceeding. This
standard stipulates minimum requirements for inspection of power quality, in terms of the scope and the precision of
measurements taken. By collaborating with German power suppliers on its development, SICAM Q80 7KG8080
benefits from large amounts of practical know-how which enables the scope of its functionality to go far beyond
EN50160.
By using multiple SICAM Q80 7KG8080 units with an external real-time clock (GPS, DCF 77, NTP or IRIG-B),
measured data from different sources can be synchronously correlated. And with the help of the database module, it
is possible to search through the data for any events or limit overstepping, and then display and compare them.
SICAM Q80 7KG8080 main field of application is stationary network monitoring with subsequent evaluation. But
short-term measurements are also fully supported, in which highly fluctuating disturbance phenomena must be
observed. For this purpose, the data can be displayed online on the connected PC.
And if the device is intended for stationary operation for longer periods (such as many months), a special data storage
mode makes it possible for the measurement results to be generated on a daily or even a monthly basis for later
retrieval at the user's convenience.
In the examples below, the values assume the European low voltage grid frequency of 50 Hz, and a phase-to-neutral
voltage of 230 Volt; for measurements of a 60 Hz grid or other voltages, the quantities must be converted/adapted
accordingly.
Power Quality Recorder SICAM Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 12.01.2015