7 Technical specifications
65
7 Technical specifications
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
in Tab. 5.
Provided uncertainties apply to PQM-700 without additional transformers and clamps.
Abbreviations:
m.v.
– reference measured value,
U
nom
– nominal voltage,
I
nom
– nominal current (of clamps),
RMS
– RMS value,
n
– harmonic order,
ph
– additional uncertainty of error in the measurement of the phase between voltage and
current harmonics.
7.1
Inputs
Voltage input terminals
Number of inputs
4 (L1, L2, L3, N - 3 measuring channels)
Maximum input voltage
760 V
RMS
40…70 Hz or DC
Measurement category
CAT IV 300 V
CAT III 600 V
CAT II 760 V
Peak input voltage
1150 V
Range of measured DC voltages
±1150 V
Analog passband (-3dB)
12 kHz
Transducers
defined by user
Impedance of measurement in-
puts
14 M
CMRR
70 dB (50 Hz)
Current input terminals
Number of inputs
4 (3 neutral) not isolated galvanically
Nominal input voltage
1 V
RMS
Peak input voltage
±3.6 V
Maximum current probes input
voltage referred to earth
5 V
RMS
Analog passband (-3dB)
12 kHz
Input Impedance
CT clamps: 100 k
Flexible clamps: 12.4 k
Measurement range (without
transducers)
Flexible clamps F-1(A)/F-2(A)/F-3(A)
: 1 ...3000 A (±10000 A peak)
CT clamps C-4(A), C-5(A)
: 1 ...1000 A (±3600 A peak)
CT clamps C-6(A): 0.01..10
A (±36 A peak)
CT clamps C-7(A): 0..100
A (±360 A peak)
Transformers
defined by user
CMRR
60 dB (50 Hz)
Summary of Contents for PQM-700
Page 85: ...85 Notes...
