Section 10 Control; Synchrocheck, Energizing Check, And Synchronizing Sesrsyn; Identification; Functionality - ABB Relion 650 Series REB650 Technical Manual

1MRK 505 288-UEN A
Section 10
10.1
10.1.1
10.1.2
Technical manual
Control
Synchrocheck, energizing check, and synchronizing
SESRSYN

Identification

Function description
Synchrocheck, energizing check, and
synchronizing

Functionality

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 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 function includes a built-in voltage selection scheme for double bus and
1½ breaker 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. The
synchronizing function evaluates voltage difference, phase angle difference, slip
frequency and frequency rate of change before issuing a controlled closing of the
circuit breaker. Breaker closing time is a parameter setting.
IEC 61850 IEC 60617
identification identification
SESRSYN
sc/vc
SYMBOL-M V1 EN
Section 10
Control
ANSI/IEEE C37.2
device number
25
161