IEC10000057-2-en.vsd
IEC10000057 V2 EN-US
Figure 410: PST screen: PRP Operation is set to On, which affect Rear OEM - Port AB and
CD which are both set to PRP
19.3
IEC 61850-9-2LE communication protocol
SEMOD172279 v2
19.3.1
Introduction
SEMOD166571-1 v2
SEMOD166590-5 v7
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.
Section 19
1MRK 505 343-UEN B
Station communication
686
Application manual
Summary of Contents for Relion 670 series
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