ABB REF615 L User Manual

Section 5 Protection related functions
5.1 Three-phase inrush detector INRPHAR
5.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase inrush detector INRPHAR 3I2f> 68
5.1.2 Function block
A070377 V1 EN
Figure 281: Function block
5.1.3 Functionality
The transformer inrush detection 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.
5.1.4 Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
1YHT530004D05 D Section 5
Protection related functions
615 series 537
Technical Manual

ABB REF615 L Specifications

General

Type	Feeder Protection Relay
Rated Frequency	50/60 Hz
Weight	Approx. 1.5 kg
Communication Protocols	IEC 61850, Modbus RTU, DNP3
Protection Functions	Overcurrent, Earth fault, Thermal overload, Under/Over voltage, Under/Over frequency
Enclosure	IP20