Analog Digital Conversion Module (Adm); Introduction; Design - ABB RED650 Technical Manual

1MRK 505 394-UEN A
22.2.6
22.2.6.1
22.2.6.2
Line differential protection RED650 2.2 IEC
Technical manual
Description
Voltage inputs **)
Rated voltage U
r
Operating range
Thermal withstand
Burden
**) all values for individual voltage inputs
Note! All current and voltage data are specified as RMS values at rated frequency

Analog digital conversion module (ADM)

Introduction

The Analog digital conversion module (ADM) has 12 analog inputs, two PC-MIP
slots and one PMC slot. PC-MIP slots are used for PC-MIP cards, and PMC slot is
used for PMC cards as described in Table 619. The SLM card should always be
mounted on the first ADM module.
Table 619: PC-MIP cards and PMC cards
PC-MIP cards
SR-LDCM
MR-LDCM
IRIG-B
RS485

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.
Value
110 or 220 V
0 - 340 V
450 V for 10 s
420 V continuously
< 20 mVA at 110 V
< 80 mVA at 220 V
PMC cards
SLM
Section 22
IED hardware
IP14285-1 v2
M13664-3 v5
M13666-3 v2
817