ABB ret650, Technical Manual

Page: 118 / 670

Signal Description
IDIFF Magnitude of fundamental frequency differential current
ANGLE Direction angle from zero sequence feature
I2RATIO Second harmonic ratio
6.2.5 Settings
Table 38: Basic general settings for the function REFPDIF (REF1-)
Parameter Range Step Default Unit Description
GlobalBaseSel 1 - 6 1 1 - Selection of one of
the Global Base
Value groups
Table 39: Basic parameter group settings for the function REFPDIF (REF1-)
Parameter Range Step Default Unit Description
Operation Off
On
- Off - Operation Off / On
IdMin 4.0 - 100.0 0.1 10.0 %IB Maximum sensitivity
in % of IBase
Table 40: Advanced parameter group settings for the function REFPDIF (REF1-)
Parameter Range Step Default Unit Description
ROA 60 - 90 1 60 Deg Relay operate angle
for zero sequence
directional feature
6.2.6 Monitored data
Table 41: REFPDIF Monitored data
Name Type Values (Range) Unit Description
IRES REAL - A Magnitude of
fundamental frequency
residual current
IN REAL - A Magnitude of
fundamental frequency
neutral current
IBIAS REAL - A Magnitude of the bias
current
IDIFF REAL - A Magnitude of
fundamental frequency
differential current
ANGLE REAL - deg Direction angle from zero
sequence feature
I2RATIO REAL - - Second harmonic ratio
Section 6
1MRK 504 135-UEN A
Differential protection
112
Technical manual