Synchronism Check, Energizing Check, And Synchronizing Sesrsyn (25) - ABB REC650 Applications Manual

1MRK 511 286-UUS A
Section 10
10.1
10.1.1
10.1.2
10.1.2.1
Application manual
Control
Synchronism check, energizing check, and
synchronizing SESRSYN (25)
Identification
Function description
Synchrocheck, energizing check, and
synchronizing
Application
Synchronizing
To allow closing of breakers between asynchronous networks a synchronizing function 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 to be 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 synchronism check
function is used.
The synchronizing function measures the difference between the V-Line and the V-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:
IEC 61850 IEC 60617
identification identification
SESRSYN
sc/vc
SYMBOL-M V1 EN
Section 10
Control
ANSI/IEEE C37.2
device number
25
183