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

13.8.7.2 Principle of operation
Zero sequence over voltage protection (LCZSPTOV, 59N) is a definite time stage
comparator function. The zero 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 zero sequence voltage is greater than the preset value 3V0PU. Trip signal will be
set high after a time delay setting of t3V0. BLOCK input will block the complete
function. BLKTR will block the trip output. The zero sequence voltage will be
available as service value output as 3V0.
13.8.7.3 Function block
ANSI09000768-1-en.vsd
LCZSPTOV (59N)
V3P*
BLOCK
BLKTR
TRIP
RI
ANSI09000768 V1 EN
Figure 422: LCZSPTOV (59N) function block
13.8.7.4 Input and output signals
Table 471: LCZSPTOV (59N) 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 472: LCZSPTOV (59N) Output signals
Name
Type Description
TRIP BOOLEAN TRIP signal for zero sequence over voltage
RI BOOLEAN Start signal for zero sequence over voltage
1MRK505222-UUS C Section 13
Scheme communication
847
Technical reference manual