6.1.6.9
Inrush detector INRPHAR
Identification
Description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase inrush detector
INRPHAR
3I2f>
68
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 operating time characteristic is according to the definite time (DT).
Operation principle
The
Operation
setting is used to enable or disable the function. The corresponding
parameter values are "On" and "Off".
The operation of INRPHAR can be described with a module diagram. All modules in
the diagram are explained in the next sections.
BLK2H
I_2H_A /
I_1H_A
I_2H_C /
I_1H_C
I_2H_A
I_2H_C
I_1H_C
I_2H_B /
I_1H_B
I_2H_B
I_1H_B
Level
detector
I_1H_A
AND
AND
AND
OR
Timer
t
Timer
t
Timer
t
GUID-E9F06FB4-115F-4244-AFC7-767936805CF8 V1 EN
Figure 81:
Functional module diagram
Section 6
1MRS757488 H
Commissioning
144
RIO600
Installation and Commissioning Manual
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