Interlocking - ABB REC650 ANSI Technical Manual

Relion 650 series bay control

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Interlocking

Functionality

The interlocking functionality blocks the possibility to operate high-voltage switching

devices, for instance when a disconnector is under load, in order to prevent material

damage and/or accidental human injury.

Each control IED has interlocking functions for different switchyard arrangements, each

handling the interlocking of one bay. The interlocking functionality in each IED is not

dependent on any central function. For the station-wide interlocking, the IEDs

communicate via the station bus or by using hard wired binary inputs/outputs.

The interlocking conditions depend on the primary bus configuration and status of any

breaker or switch at any given time.

Logical node for interlocking SCILO (3)

Identification

Function description

Logical node for interlocking

Functionality

The Logical node for interlocking SCILO(3) function is used to enable a switching

operation if the interlocking conditions permit. SCILO (3) function itself does not provide

any interlocking functionality. The interlocking conditions are generated in separate

function blocks containing the interlocking logic and provides SCILO(3) its input.

Function block

ANSI09000083-1-en.vsd

ANSI09000083 V1 EN

SCILO (3) function block

identification

1MRK 511 287-UUS A

ANSI/IEEE C37.2

device number

Technical manual

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