Měřící Energetické Aparáty
28
Measuring characteristics
A/D convertor:
16 bit
Sampling frequency: 256 samples a period
Antialiasing filter:
digital filter of the FIR type
Phase lock:
controlled by passage of basic harmonic voltage U1 through zero
Aggregation intervals: quality function – pursuant to the standard of EN 61000-4-30, ed. 2
recorder function – from 1 sec to 1/4 hour
Aggregation synchronization: pursuant to the standard of EN 61000-4-30, ed. 2,
Time base:
±1 sec in 24 hours at operating temperature,
when GPS signal not connected
Voltage inputs U1, U2, U3 and U4
SW setting of voltage level:
LV
MV and HV
Rated phase voltages U
n
P-N:
230 V
AC
100 / √3 V
AC
JRated delta voltages U
n
P-P:
400 V
AC
100 V
AC
Measuring range of phase voltages:
300 V
AC
190 V
AC
Maximum input voltage P-N:
300 V
AC
Uncertainty of voltage measurement
with f = 50 Hz:
0.05 % rdg ± 0.025 % U
n
Frequency range:
up to 7.2 kHz
Input resistance:
1.68 MΩ
Temperature coefficient:
0.05 % / 10 K
Measurement:
direct
indirect
Max. voltage transforming ratio:
none 999 kV / 100 V (optional SW PQ)
Current inputs
Rated current value I
n
:
1 A or 5 A
Current measuring range:
5 % I
n
to 120 %
I
n
Frequency range:
40 Hz to 7.2 kHz
Current measurement uncertainty
I
n
= 1 A, 5 A:
0.05 % rdg. ± 0.025 % I
n
(45 Hz to 60 Hz)
Temperature coefficient:
0.02 % / 10 K
Harmonic measurement uncertainties
I
n
= 1 A, 5 A:
± 5 % I
harm
at I
harm
≥ 3 % I
n
a ± 0.15 % I
n
at I
harm
< 3 % I
n
Summary of Contents for Meg39
Page 1: ...PQ monitor MEg39 User manual M c Energetick Apar ty a s 664 31 esk 390 Czech Republic...
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