ABB RES670 Technical Manual page 377

1MRK 511 408-UUS A
Phasor measurement unit RES670 2.2 ANSI
Technical manual
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.
Sequence Detection
3I0PU
IA
Zero
sequence
filter
IB
Negative
sequence
IC
filter
3I2PU
3V0PU
VA
Zero
sequence
filter
VB
Negative
sequence
VC
filter
3V2PU
ANSI10000036 V2 EN-US
Figure 130: Simplified logic diagram for sequence detection part
The calculated values 3V0, 3I0, 3I2 and 3V2 are available as service values on local
HMI and monitoring tool in PCM600.
Input and output signals
The output signals 3PH, BLKV and BLKZ as well as the signals DLD1PH and
DLD3PH from dead line detections are blocked if any of the following conditions
occur:
• The input BLOCK is activated
• The input BLKTRIP is activated and the internal signal FuseFailStarted is not
present
• The operation mode selector OpModeSel is set to Disable
• The IED is in TEST status (TEST-ACTIVE is high) and the function has been
blocked from the HMI (BlockFUSE=Yes)
The input BLOCK signal is a general purpose blocking signal of the fuse failure
supervision function. It can be connected to a binary input of the IED in order to
receive a block command from external devices or can be software connected to other
Secondary system supervision
a
a>b 100 ms
b
0
AND
a
a>b 100 ms
b
0
AND
a
a>b
b
a
a>b
b
Section 13
CurrZeroSeq
3I0
CurrNegSeq
3I2
FuseFailDetZeroSeq
FuseFailDetNegSeq
VoltZeroSeq
3V0
VoltNegSeq
3V2
ANSI10000036-2-en.vsd
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