ABB Relion 670 series, Technical Reference Manual

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Section 12 Control
About this chapter
This chapter describes the control functions. The way the functions work, their setting
parameters, function blocks, input and output signals and technical data are included
for each function.
12.1 Synchronism check, energizing check, and
synchronizing SESRSYN (25)
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Synchrocheck, energizing check, and
synchronizing
SESRSYN
sc/vc
SYMBOL-M V1 EN
25
12.1.1 Introduction
The Synchronizing function allows closing of asynchronous networks at the correct
moment including the breaker closing time, which improves the network stability.
Synchrocheck, energizing check, and synchronizing (SESRSYN, 25) function checks
that the voltages on both sides of the circuit breaker are in synchronism, or with at least
one side dead to ensure that closing can be done safely.
SESRSYN (25) function includes a built-in voltage selection scheme for double bus
and breaker-and-a-half or ring busbar arrangements.
Manual closing as well as automatic reclosing can be checked by the function and can
have different settings.
For systems which are running asynchronous a synchronizing function is provided.
The main purpose of the synchronizing function is to provide controlled closing of
circuit breakers when two asynchronous systems are going to be connected. It is used
1MRK505222-UUS C
Section 12
Control
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Technical reference manual