ABB RELION REX640 Technical Manual page 1266

Protection and control

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Table of Contents

Protection related functions

Analog channel configuration

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

Table 1197: Analog inputs

There are a few special conditions which must be noted with the configuration.

Table 1198: Special conditions

U3P connected to real meas-

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

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

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

modules in the diagram are explained in the next sections.

Three-phase voltages

See the preprocessing function blocks in this document for the possible

signal sources.

The function can work with any two phases connected but it

is recommended to connect all three voltage channels.

1MRS759142 F

Operation setting. The

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