ABB Relion 670 series - Principle of operation; Function block; Input and output signals

13.8.6.2 Principle of operation
Negative sequence over voltage protection (LCNSPTOV, 47) is a definite time stage
comparator function. The negative sequence input voltage from the SMAI block is
connected as input to the function through a group connection V3P in PCM600. This
voltage is compared against the preset value and a pickup signal will be set high if the
input negative sequence voltage is greater than the preset value Pickup2. Trip signal
will be set high after a time delay setting oftV2. There is a BLOCK input which will
block the complete function. BLKTR will block the trip output. The negative sequence
voltage is also available as service value output U2.
13.8.6.3 Function block
ANSI09000767-1-en.vsd
LCNSPTOV (47)
V3P*
BLOCK
BLKTR
TRIP
RI
ANSI09000767 V1 EN
Figure 421: LCNSPTOV (47) Function block
13.8.6.4 Input and output signals
Table 467: LCNSPTOV (47) Input signals
Name
Type Default Description
V3P GROUP
SIGNAL
- Three phase group signal for voltage inputs
BLOCK BOOLEAN 0 Block overall function
BLKTR BOOLEAN 0 Block trip output
Table 468: LCNSPTOV (47) Output signals
Name
Type Description
TRIP BOOLEAN Trip signal for negative sequence over voltage
RI BOOLEAN Start signal for negative sequence over voltage
1MRK505222-UUS C Section 13
Scheme communication
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Technical reference manual