ABB Relion 650 Series Technical Manual page 232

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and AU_CLOSE, the operator place is not evaluated. If the operator place is set to

Off, the commands through the inputs AU_OPEN and AU_CLOSE are not accepted.

Interaction with synchrocheck and synchronizing functions

The Switch controller (SCSWI) works in conjunction with the synchrocheck and

the synchronizing function (SESRSYN). It is assumed that the synchrocheck

function is continuously in operation and gives the result to SCSWI. The result

from the synchrocheck function is evaluated during the close execution. If the

operator performs an override of the synchrocheck, the evaluation of the

synchrocheck state is omitted. When there is a positive confirmation from the

synchrocheck function, SCSWI will send the close signal EXE_CL to the switch

function Circuit breaker (SXCBR).

When there is no positive confirmation from the synchrocheck function, SCSWI

will send a start signal START_SY to the synchronizing function, which will send

the closing command to SXCBR when the synchronizing conditions are fulfilled,

see Figure 93. If no synchronizing function is included, the timer for supervision of

the "synchronizing in progress signal" is set to 0, which means no start of the

synchronizing function. SCSWI will then set the attribute "blocked-by-

synchrocheck" in the "cause" signal. See also the time diagram in Figure 97.

IEC09000209 V2 EN-US

Example of interaction between SCSWI, SESRSYN (synchrocheck

and synchronizing function) and SXCBR function

Time diagrams

The Switch controller (SCSWI) function has timers for evaluating different time

supervision conditions. These timers are explained here.

Synchronizing

1MRK 511 424-UEN B

IEC09000209-2-en.vsd

Bay control REC650 2.2 IEC

Technical manual

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