The directional positive-sequence power protection contains a blocking
functionality which blocks function output and resets Timer.
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.
5.14.4 Analog channel configuration
DPSRDIR has two analog group inputs which must be properly configured.
Table 1211: Analog inputs
Input Description
I3P Three-phase currents
U3P Three-phase voltages
See the preprocessing function blocks in this document for the possible
signal sources.
There are a few special conditions which must be noted with the configuration.
Table 1212: Special conditions
Condition Description
U3P connected to real meas-
urements
The function can work with any two phase voltage channels
connected but it is recommended to connect all three volt-
age channels.
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.
5.14.5 Operation principle
The function can be enabled and disabled with the
Operation
setting. 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.
Protection related functions
1MRS759142 F
1282 REX640
Technical Manual
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