Fuse Failure Supervision Seqrfuf - ABB REF615 Applications Manual

1MRS756378 D
7.3
7.3.1
7.3.2
REF615
Application Manual
GUID-BBF3E23F-7CE4-43A3-8986-5AACA0433235 V1 EN
Figure 101: Example of incorrect reference current connection

Fuse failure supervision SEQRFUF

Identification
Table 80: Function identification
IEC 61850 identification:
IEC 60617 identification:
ANSI/IEEE C37.2 device number:
Functionality
The fuse failure supervision function SEQRFUF is used to block the voltage
measuring functions at failures in the secondary circuits between the voltage
transformer and IED to avoid unwanted operations that might occur otherwise.
SEQRFUF basically has two different algorithms, a negative sequence based
algorithm and delta voltage and delta current algorithm.
Supervision functions
SEQRFUF
FUSEF
60
Section 7
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