ABB RELION REX640 Technical Manual page 1360

Protection and control

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Table of Contents

Condition monitoring functions

Table 1309: Analog inputs

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 circuit breaker condition monitoring function includes different metering and

monitoring sub-functions. The functions can be enabled and disabled with the

Operation setting. The corresponding parameter values are "On" and "Off". The

operation counters are cleared when

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

the diagram are explained in the next sections.

See the preprocessing function blocks in this document for the possible

signal sources.

Three-phase currents

Operation is set to "Off".

1MRS759142 F

Technical Manual