Analog Digital Conversion Module (Adm) - ABB RES670 Technical Manual

Relion 670 series, phasor measurement unit

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1MRK 511 408-UUS A

Phasor measurement unit RES670 2.2 ANSI

Technical manual

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 636. The SLM card should always be mounted on the

first ADM module.

PC-MIP cards and PMC cards

PC-MIP cards

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.

IED hardware

IP14285-1 v2

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