ABB Relion 670 series - Page 739

Table 430: FUFSPVC Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base Value
groups
13.2.6 Monitored data
PID-3492-MONITOREDDATA v6
Table 431: FUFSPVC Monitored data
Name Type Values (Range) Unit Description
3I0 REAL - A Magnitude of zero sequence current
3I2 REAL - A Magnitude of negative sequence current
3V0 REAL - kV Magnitude of zero sequence voltage
3V2 REAL - kV Magnitude of negative sequence voltage
13.2.7 Operation principle
13.2.7.1 Zero and negative sequence detection
M13677-3 v5
The zero and negative sequence function continuously measures the currents and voltages in all
three phases and calculates, see figure
391:
• the zero-sequence voltage 3V0
• the zero-sequence current 3I0
• the negative sequence current 3I2
• the negative sequence voltage 3V2
The measured signals are compared with their respective set values
3V0PU and 3I0PU , 3V2PU and
3I2PU .
The function enable the internal signal FuseFailDetZeroSeq if the measured zero-sequence voltage
is higher than the set value
3V0PU and the measured zero-sequence current is below the set value
3I0PU .
The function enable the internal signal FuseFailDetNegSeq if the measured negative sequence
voltage is higher than the set value 3V2PU and the measured negative sequence current is below
the set value
3I2PU .
A drop out delay of 100 ms for the measured zero-sequence and negative sequence current will
prevent a false fuse failure detection at un-equal breaker opening at the two line ends.
1MRK 502 066-UUS B Section 13
Secondary system supervision
733
Technical manual