Section 12 Control
12.1 Synchrocheck, energizing check, and synchronizing
SESRSYN
12.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Synchrocheck, energizing check, and
synchronizing
SESRSYN
SYMBOL-M V1 EN
25
12.1.2 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.
However this function can not be used to automatically synchronize the generator to
the network.
1MRK 502 048-UEN A Section 12
Control
321
Technical manual
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