IA
IB
IC
Zero
sequence
filter
Negative
sequence
filter
VA
VB
VC
Zero
sequence
filter
Negative
sequence
filter
CurrZeroSeq
CurrNegSeq
a
b
a>b
a
b
a>b
a
b
a>b
a
b
a>b
3I0PU
3I2PU
VoltZeroSeq
VoltNegSeq
AND
AND
FuseFailDetZeroSeq
FuseFailDetNegSeq
Sequence Detection
3V0PU
3V2PU
3I0
3I2
3V0
3V2
ANSI10000036-2-en.vsd
0
100 ms
0
100 ms
ANSI10000036 V2 EN
Figure 127:
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 internal
functions of the IED itself in order to receive a block command from internal functions.
Through OR gate it can be connected to both binary inputs and internal function outputs.
The input BLKTRIP is intended to be connected to the trip output from any of the
protection functions included in the IED. When activated for more than 20 ms, the
1MRK 511 365-UUS A
Section 13
Secondary system supervision
Phasor measurement unit RES670 2.1 ANSI
367
Technical manual
Содержание Relion 670 Series RES670
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