Synchronism Check, Energizing Check, And Synchronizing Sesrsyn (25) - ABB Relion Technical Manual

Generator protection

Hide thumbs Also See for Relion:

Table of Contents

1MRK 502 048-UUS A

Technical manual

Synchronism check, energizing check, and

synchronizing SESRSYN (25)

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 (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.

identification

SYMBOL-M V1 EN

ANSI/IEEE C37.2

device number

Chapters

Table of Contents

650 series Reg650 ansi