Analog Channel Configuration - ABB RELION REX640 Technical Manual

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1MRS759142 C

Technical Manual

DSTPLAL can be controlled either by the autorecloser (zone extension logic) or by

monitoring the loss of load currents (the loss of load logic). Both operation modes are

enabled independently.

Analog channel configuration

DSTPLAL has one analog group input which must be properly configured.

Analog inputs

See the preprocessing function blocks in this document for the

possible signal sources.

Improper analog channel configuration causes a validation error if the analog

channels are not completely configured or they do not match with certain settings. For

troubleshooting, check the contents of this chapter and also the preprocessing blocks

in this document. The configuration can be written to the protection relay once the

mismatch is corrected.

Operation principle

The function can be enabled and disabled with the Operation setting. The

corresponding parameter values are "on" and "off".

The operation of DSTPLAL can be described with a module diagram. All the modules

in the diagram are explained in the next sections.

LOSSLOAD_ACC

GUID-3E377773-BBF5-4609-9696-006C44E936F2 V1 EN

Functional module diagram

Zone extension logic

Zone extension logic is enabled with Operation mode = "Zone extension".

Protection related functions

Three-phase currents

OPR_LOSSLOAD

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