Iec 61850-9-2Le Communication Protocol; Introduction - ABB RELION 670 Series Applications Manual

Section 19
Station communication
IEC10000057 V2 EN-US
Figure 382: PST screen: PRP Operation is set to On, which affect Rear OEM - Port AB and
19.3

IEC 61850-9-2LE communication protocol

19.3.1

Introduction

Every IED can be provided with communication interfaces enabling it to connect to the
process buses in order to get data from analog data acquisition units close to the process
(primary apparatus), commonly known as Merging Units (MU). The protocol used in this case is
the IEC/UCA 61850-9-2LE communication protocol.
The IEC/UCA 61850-9-2LE standard does not specify the quality of the sampled values. Thus,
the accuracy of the current and voltage inputs to the merging unit and the inaccuracy added
by the merging unit must be coordinated with the requirement for the actual type of
protection function.
670
CD which are both set to PRP
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IEC10000057-2-en.vsd
SEMOD172279 v2
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Application manual