GUID-BBF3E23F-7CE4-43A3-8986-5AACA0433235 V1 EN
Figure 101: Example of incorrect reference current connection
7.3 Fuse failure supervision SEQRFUF
7.3.1 Identification
Table 80: Function identification
IEC 61850 identification:
SEQRFUF
IEC 60617 identification: FUSEF
ANSI/IEEE C37.2 device number: 60
7.3.2 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.
1MRS756378 D Section 7
Supervision functions
REF615 199
Application Manual
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