Table 694:
PC-MIP cards and PMC cards
PC-MIP cards
PMC cards
LDCM
SLM
LR-LDCM
OEM 1 ch
MR-LDCM
OEM 2 ch
X21-LDCM
IRIG-B
RS485
19.2.8.2
Design
The Analog digital conversion module input signals are voltage and current from the
transformer module. Shunts are used to adapt the current signals to the electronic
voltage level. To gain dynamic range for the current inputs, two shunts with separate A
\D channels are used for each input current. In this way a 20 bit dynamic range is
obtained with a 16 bit A\D converter.
Input signals are sampled with a sampling freqency of 5 kHz at 50 Hz system
frequency and 6 kHz at 60 Hz system frequency.
The A\D converted signals goes through a filter with a cut off frequency of 500 Hz and
are reported to the numerical module (NUM) with 1 kHz at 50 Hz system frequency
and 1,2 kHz at 60 Hz system frequency.
1MRK505222-UUS C
Section 19
IED hardware
1097
Technical reference manual
Содержание Relion 670 series
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