ABB RELION REX640 - 4.3.6.2 Function block; 4.3.6.3 Functionality; 4.3.6.4 Analog channel configuration; 4.3.6.5 Operation principle

4.3.6.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
High-impedance differential protec-
tion for phase A
HIAPDIF dHi_A> 87_A
High-impedance differential protec-
tion for phase B
HIBPDIF dHi_B> 87_B
High-impedance differential protec-
tion for phase C
HICPDIF dHi_C> 87_C
4.3.6.2 Function block
Figure 438: Function block
4.3.6.3 Functionality
The high-impedance differential protection function HIxPDIF is a general differential
protection. It provides a phase-segregated short circuit protection for the busbar.
However, the function can also be used for providing generator, motor, transformer
and reactor protection.
The function starts and operates when the differential current exceeds the set limit.
The operate time characteristics are according to definite time (DT).
The function contains a blocking functionality. It is possible to block the function
outputs, timer or the whole function.
4.3.6.4 Analog channel configuration
HIxPDIF has one analog group input which must be properly configured.
Table 696: Analog inputs
Input Description
I3P Three-phase currents
See the preprocessing function blocks in this document for the possible
signal sources.
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings.
For troubleshooting, check the contents of this chapter and also the preprocessing
blocks in this document. The configuration can be written to the protection relay
once the mismatch is corrected.
1MRS759142 F
Protection functions
REX640
Technical Manual
773