User manual
6 Technical data
91
6 Technical data
Specifications are subject to change without prior notice. Recent revisions of technical documen-
tation are available at www.sonel.pl.
Basic uncertainty is the uncertainty of a measurement instrument at reference conditions specified
Tab. 6.
Provided uncertainties apply to the analyzer without additional transformers and clamps.
Abbreviations:
m.v. - reference measured value,
U
nom
– nominal voltage,
I
nom
– nominal current (clamps),
RMS – root mean square value,
n - harmonic,
ph
– additional uncertainty caused by the error of phase measurement between the volt-
age and current harmonics.
6.1 Inputs
Voltage input terminals
Number of inputs
5 (L1, L2, L3, N, PE - 4 measuring channels) not galvanically isolated
Maximum input voltage
760 V
RMS
Peak input voltage (no ADC
clamping)
1500 V (high voltage range)
450 V (low voltage range)
Range of measured DC voltages
±1500 V (high voltage range)
±450 V (low voltage range)
Analog pass band (-3dB)
20 kHz
Transducers
defined by user
Impedance of measurement in-
puts
10 M (differential)
CMRR
70 dB (50 Hz)
Current input terminals
Number of inputs
4 (3 phases + neutral) not galvanically isolated
Nominal input voltage (CT
clamps)
1 V
RMS
Peak input voltage (CT clamps)
3.6 V
Analog pass band (-3dB)
20 kHz
Input Impedance
CT clamps circuit: 100 k
Flexible clamps circuit: 12.4 k
Measurement range (without
transformers)
Flexible clamps F-1/F-2/F-3: 1..3000 A (±10000 A peak, 50 Hz)
Hard clamps C-4, C-5: 1..1000 A (±3600 A peak)
Hard clamps C-6: 0.01..10 A (±36 A peak)
Hard clamps C-7: 0..100 A (±360 A peak)
Transducers
defined by user
CMRR
60 dB (50 Hz)
6.2 Sampling and RTC
Sampling and RTC
A/C converter
16-bit
Sampling rate
10.24 kHz for 50 Hz and 60 Hz
Simultaneous sampling in all channels
Samples per period
204.8 for 50 Hz; 170.67 for 60 Hz
PLL synchronization
40..70 Hz
Reference channel for PLL
L1
Real-time clock
3.5 ppm max (approx. 9 sec./month)
in the temperature range of -20C…+55C