ABB RELION REX640 Technical Manual page 1282

Protection and control

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Protection related functions

The directional positive-sequence power protection contains a blocking

functionality which blocks function output and resets Timer.

Analog channel configuration

DPSRDIR has two analog group inputs which must be properly configured.

Table 1211: Analog inputs

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

Table 1212: 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 DPSRDIR can be described with a module diagram. All the modules

in the diagram are explained in the next sections.

DPSRDIR executes on the direction of positive-sequence power and not

the value. If overpower or underpower is needed, refer to DOPPDPR and

DUPPDPR. DPSRDIR is generally used for directional controls.

Three-phase currents

Three-phase voltages

See the preprocessing function blocks in this document for the possible

signal sources.

The function can work with any two phase voltage channels

connected but it is recommended to connect all three volt-

age channels.

1MRS759142 F

Operation setting. The

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