ABB RELION 670 Series Technical Manual page 739

1MRK 502 066-UUS B
Table 430: FUFSPVC Non group settings (basic)
Name Values (Range)
GlobalBaseSel 1 - 12
13.2.6 Monitored data
Table 431: FUFSPVC Monitored data
Name
3I0
3I2
3V0
3V2
13.2.7 Operation principle
13.2.7.1 Zero and negative sequence detection
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
3I2PU .
The function enable the internal signal FuseFailDetZeroSeq if the measured zero-sequence voltage
is higher than the set value
3I0PU .
The function enable the internal signal FuseFailDetNegSeq if the measured negative sequence
voltage is higher than the set value
the set value
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.
Technical manual
Unit Step
- 1
Type Values (Range)
REAL -
REAL -
REAL -
REAL -
3V0PU and the measured zero-sequence current is below the set value
3V2PU and the measured negative sequence current is below
3I2PU .
Default Description
1 Selection of one of the Global Base Value
groups
Unit Description
A Magnitude of zero sequence current
A Magnitude of negative sequence current
kV Magnitude of zero sequence voltage
kV Magnitude of negative sequence voltage
Section 13
Secondary system supervision
PID-3492-MONITOREDDATA v6
3V0PU and 3I0PU , 3V2PU and
M13677-3 v5
733