ABB 650 series User Manual

Section 8 Control
8.1 Synchrocheck, energizing check, and synchronizing
SESRSYN
IP14558-1 v4
8.1.1 Identification
M14889-1 v4
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-US
25
8.1.2 Application
IP15111-1 v1
8.1.2.1 Synchronizing
SEMOD171992-5 v9
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.
1MRK 511 423-UEN A Section 8
Control
Bay control REC650 2.2 IEC 95
Application manual

ABB 650 series Specifications

General

Brand	ABB
Model	650 series
Category	Controller
Language	English