ABB REG670 - Introduction

Table 888: TRM - Energizing quantities, rated values and limits for measuring transformer
modules
Quantity Rated value Nominal range
Current I
r
= 1 or 5 A (0-1.8) × I
r
at I
r
= 1 A
(0-1.6) × I
r
at I
r
= 5 A
Permissive overload 1.1 × I
r
cont.
1.8 × I
r
for 30 min at I
r
= 1 A
1.6 × I
r
for 30 min at I
r
= 5 A
Burden < 350 mVA at I
r
= 5 A
< 200 mVA at I
r
= 1 A
Ac voltage U
r
= 110 V 0.5–288 V
Operative range (0–340) V
Permissive overload 420 V cont.
450 V 10 s
Burden < 20 mVA at 110 V
Frequency f
r
= 50/60 Hz ±5%
21.2.6 Analog digital conversion module, with time synchronization
(ADM)
21.2.6.1 Introduction
The Analog/Digital module has twelve analog inputs, 2 PC-MIP slots and 1 PMC slot.
The PC-MIP slot is used for PC-MIP cards and the PMC slot for PMC cards according
to table 889. The OEM card should always be mounted on the ADM board.
Table 889: PC-MIP cards and PMC cards
PC-MIP cards
PMC cards
SR-LDCM SLM
LR-LDCM OEM 1 ch
MR-LDCM OEM 2 ch
X21-LDCM
IRIG-B
RS485
21.2.6.2 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.
Section 21 1MRK502052-UEN B
IED hardware
1154
Technical manual