ABB RELION 670 Series Technical Manual page 736

Section 13
Secondary system supervision
13.1.7 Technical data
Table 426: CCSSPVC(87) technical data
Function
Trip current
Reset ratio, Trip current
Block current
Reset ratio, Block current
13.2 Fuse failure supervision FUFSPVC
13.2.1 Identification
Function description
Fuse failure supervision
13.2.2 Functionality
The aim of the fuse failure supervision function FUFSPVC is to block voltage measuring functions
at failures in the secondary circuits between the voltage transformer and the IED in order to avoid
inadvertent operations that otherwise might occur.
The fuse failure supervision function basically has three different detection methods, negative
sequence and zero sequence based detection and an additional delta voltage and delta current
detection.
The negative sequence detection algorithm is recommended for IEDs used in isolated or high-
impedance grounded networks. It is based on the negative-sequence quantities.
The zero sequence detection is recommended for IEDs used in directly or low impedance
grounded networks. It is based on the zero sequence measuring quantities.
The selection of different operation modes is possible by a setting parameter in order to take into
account the particular grounding of the network.
730
Due to the formulas for the axis compared, |SIphase | - |I ref | and |S I phase | + | I ref
| respectively, the slope can not be above 2.
Range or value
(10-200)% of IBase
>90%
(20-500)% of IBase
>90% at (50-500)% of IBase
IEC 61850
identification
FUFSPVC
Accuracy
±10.0% of I at I ≤ I
n
±10.0% of I at I > I
n
±5.0% of I at I ≤ I
n n
±5.0% of I at I > I
n
IEC 60617 ANSI/IEEE C37.2
identification device number
- -
1MRK 502 066-UUS B
M12358-1 v9
n
IP14556-1 v3
M14869-1 v4
SEMOD113820-4 v11
Technical manual