Three-Phase Inrush Detector Inrphar - ABB RELION REX640 Technical Manual

1MRS759142 C
Section 5
5.1
5.1.1
5.1.2
5.1.3
5.1.4
REX640
Technical Manual
Protection related functions

Three-phase inrush detector INRPHAR

Identification
Function description
Three-phase inrush detector
Function block
GUID-9ED7ECD3-513A-46FE-BC89-295D2235A790 V1 EN
Figure 569: Function block
Functionality
The three-phase inrush detector function INRPHAR is used to detect 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.
Analog channel configuration
INRPHAR has one analog group input which must be properly configured.
Table 998: Analog signals
Input
I3P
Protection related functions
IEC 61850 IEC 60617
identification identification
INRPHAR 3I2f>
Description
Three-phase currents
Section 5
ANSI/IEEE C37.2
device number
68HB
1061