Section 8 Control; Synchrocheck, Energizing Check, And Synchronizing Sesrsyn; Identification; Application - ABB 650 series Applications Manual

1MRK 511 423-UEN A
Section 8
8.1
8.1.1
8.1.2
8.1.2.1
Bay control REC650 2.2 IEC
Application manual
Control
Synchrocheck, energizing check, and synchronizing
SESRSYN

Identification

Function description
Synchrocheck, energizing check, and

synchronizing

Application

Synchronizing
To allow closing of breakers between asynchronous networks, a synchronizing
feature is provided. The breaker close command is issued at the optimum time
when conditions across the breaker are satisfied in order to avoid stress on the
network and its components.
The systems are defined as asynchronous when the frequency difference between
bus and line is larger than an adjustable parameter. If the frequency difference is
less than this threshold value the system is defined to have a parallel circuit and the
synchrocheck function is used.
The synchronizing function measures the difference between the U-Line and the U-
Bus. It operates and enables a closing command to the circuit breaker when the
calculated closing angle is equal to the measured phase angle and the following
conditions are simultaneously fulfilled:
• The voltages U-Line and U-Bus are higher than the set values for
UHighBusSynch and UHighLineSynch of the respective base voltages
GblBaseSelBus and GblBaseSelLine.
• The difference in the voltage is smaller than the set value of UDiffSynch.
• The difference in frequency is less than the set value of FreqDiffMax and
larger than the set value of FreqDiffMin. If the frequency is less than
FreqDiffMin the synchrocheck is used and the value of FreqDiffMin must thus
be identical to the value FreqDiffM resp FreqDiffA for synchrocheck function.
IEC 61850 IEC 60617
identification identification
SESRSYN
sc/vc
SYMBOL-M V1 EN-US
Section 8
Control
IP14558-1 v4
M14889-1 v4
ANSI/IEEE C37.2
device number
25
IP15111-1 v1
SEMOD171992-5 v9
95