ZES ZIMMER LMG450, User Manual

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Z E S ZIMMER Electronic Systems GmbH Chapter 13
257
20kHz 0mV
100kHz 0mV
Voltage inputs for current measuring with isolating current sensors
Rated range value / V 0.12 0.25 0.5 1 2 4
Measurable TRMS value / V 0.15 0.3 0.6 1.2 2.5 5
Permissible peak value / V 0.25 0.5 1 2 4 8
Overload capability 100V continuously, 250V for 1s
Input resistance 100k
Ω
, 10pF
Common mode error no error per definition, because this input is not isolated from chassis
ground, so you can’t apply a common mode signal.
13.3.3 Accuracy
An example, how to handle this values, you find in 12.1.1, ‘Accuracy of measured and
computed values’
Measuring accuracy
The values are in
±
(% of measuring value + % of measuring range)
Frequency/Hz DC 1Hz-1kHz 1kHz-5kHz 5kHz-20kHz
Voltage 0.2+0.2 0.1+0.1 0.2+0.2 0.3+0.4
Current via direct input 0.4+0.4 0.15+0.1 0.2+0.2 0.5+0.5
Active Power via direct input 0.5+0.5 0.2+0.1 0.3+0.2 0.6+0.5
Current via voltage input 0.2+0.2 0.1+0.1 0.2+0.2 0.3+0.4
Active power via voltage input 0.3+0.3 0.15+0.1 0.3+0.2 0.6+0.5
Just for AC Coupling
Frequency/Hz
45...65Hz
Voltage 0.05+0.05
Current via direct input 0.05+0.05
Active Power via direct input
0.07+0.04
Current via voltage input 0.05+0.05
Active power via voltage input 0.07+0.07
With DC coupling you have to use the first table!
Accuracies based on:
1. sinusoidal voltages and currents
2. ambient temperature (23
±
3)°C, no additional heating or cooling (i.e. by sunlight or current
of air)
3. warm up time 1h