Analog Channel Configuration; Operation Principle - ABB RELION REX640 Technical Manual

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Protection functions

Analog channel configuration

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

Analog signals

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.

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

corresponding parameter values are "On" and "Off".

The operation of MPTTR can be described using a module diagram. All the modules

in the diagram are explained in the next sections.

The function uses ambient temperature which can be measured locally or remotely.

Local measurement is done by the protection relay. Remote measurement uses analog

GOOSE to connect AMB_TEMP input.

If the quality of remotely measured temperature is invalid or

communication channel fails the function uses ambient temperature

set in Env temperature Set.

GUID-E9FDBA65-8D30-4430-A156-029C61F4A42A V1 EN

Functional module diagram

Three-phase currents

1MRS759142 C

Technical Manual

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