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Section 10
Control
10.1
Synchronism check, energizing check, and
synchronizing SESRSYN (25)
10.1.1
Identification
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
25
10.1.2
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 (25) 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 (25) function includes a built-in voltage selection scheme for double bus and
breaker-and-a-half 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.
1MRK 511 287-UUS A
Section 10
Control
221
Technical manual
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