Monitored Data - ABB Relion 650 Series Technical Manual

Section 7
Secondary system supervision
7.2.6
7.2.7
7.2.7.1
118

Monitored data

Table 54: FUFSPVC Monitored data
Name Type
3I0 REAL
3I2 REAL
3U0 REAL
3U2 REAL
Operation principle
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 48:
• the zero-sequence voltage 3U0
• the zero-sequence current 3I0
• the negative sequence current 3I2
• the negative sequence voltage 3U2
The measured signals are compared with their respective set values 3U0> and
3I0<, 3U2> and 3I2<.
The function enable the internal signal FuseFailDetZeroSeq if the measured zero-
sequence voltage is higher than the set value 3U0> and the measured zero-
sequence current is below the set value 3I0<.
The function enable the internal signal FuseFailDetNegSeq if the measured
negative sequence voltage is higher than the set value 3U2> and the measured
negative sequence current is below the set value 3I2<.
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.
Values (Range) Unit
- A
- A
- kV
- kV
1MRK 511 424-UEN B
PID-3492-MONITOREDDATA v8
Description
Magnitude of zero
sequence current
Magnitude of negative
sequence current
Magnitude of zero
sequence voltage
Magnitude of negative
sequence voltage
M13677-3 v5
Bay control REC650 2.2 IEC
Technical manual