Signals - ABB RELION REX640 Technical Manual

1MRS759142 C
4.12.4.7
REX640
Technical Manual
The settings Alarm start value and Start value determine the portion of the total
harmonic current (excluding the harmonic defined by the setting Tuning harmonic
Num) in relation to the CT nominal value required for SRCPTOC to give alarm and
operate respectively.
For power factor correction application
• Tuning harmonic Num must be set to 1.
• Alarm start value and Start value must be set according to the standard IEEE519
-1992.
For harmonic filter application
• Tuning harmonic Num must be set to the filter design tuning frequency.
• Alarm start value and Start value must be set according to the standard IEEE519
-1992.
Settings Alarm start value and Start value should be selected as such
that in normal operation SRCPTOC should not operate.

Signals

Table 985: SRCPTOC Input signals
Name Type
I3P SIGNAL
BLOCK BOOLEAN
RESO_IN BOOLEAN
Table 986: SRCPTOC Output signals
Name Type
ALARM BOOLEAN
OPERATE BOOLEAN
Protection functions
Default Description
- Three-phase currents
0=False Block signal for activating the blocking mode
0=False Input signal from higher frequency resonance
branch
Description
Alarm
Operate signal
Section 4
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