Three-Phase Inrush Detector Inrphar - ABB RELION Series Technical Manual

1MRS758755 A
Section 5
5.1
5.1.1
5.1.2
5.1.3
5.1.4
REC615 and RER615
Technical Manual
Protection related functions

Three-phase inrush detector INRPHAR

Identification
Function description
Three-phase inrush detector
Function block
A070377 V1 EN
Figure 234: Function block
Functionality
The three-phase inrush detector function INRPHAR is used to coordinate transformer
inrush situations in distribution networks.
Transformer inrush detection is based on the following principle: the output signal
BLK2H is activated once the numerically derived ratio of second harmonic current
I_2H and the fundamental frequency current I_1H exceeds the set value.
The operate time characteristic for the function is of definite time (DT) type.
The function contains a blocking functionality. Blocking deactivates all outputs and
resets timers.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
Protection related functions
IEC 61850 IEC 60617
identification identification
INRPHAR 3I2f>
Section 5
ANSI/IEEE C37.2
device number
68
461