ABB Relion 620 Series - Phase Status Determination

Section 3 1MAC308145-MB E
RER620 application
66 RER620
Application Manual
In case of mid-point mode, the numbers of voltage transformers connected can be either 1
or 3. So the Vt config line can be either "1" or "3". The phase selection is similar as in
sectionalizer mode but Vt config line cannot be "2".
In case of tie-point mode the 3 phases of both sources are considered. Hence in tie-point
mode the Vt config line and Vt config load settings should be selected as "3" and Vt line
enable and Vt load enable should be selected as 'TRUE". That is tie-point recloser should
always have 3 voltage transformers connected to each source.
3.5.6 Phase Status Determination
Phase status determination module determines the status of phases selected. The status of
phase can be live or dead or neither live nor dead based on the level of the respective phase
voltages.
In midpoint mode, the SET_GROUP_CHANGE is activated and SWOTF output is
activated for a time of SWOTF time setting if the status of the phases selected is dead and
if En set grp chg setting is TRUE.
Figure 49: Group change initiation through LCM
In tie point mode, the LCM_CLOSE is activated and also the SWOTF output is activated
for a time of SWOTF time setting, if the status of the 3 phases of one source is live and the
status of 3 phases of the other source is dead. And also the SET_GROUP_CHANGE is
activated, if source selected as line side is dead and if En set grp chg setting is TRUE.
SRGAPC1(SRGAPC1
S1
R1
S2
R2
S3
R3
S4
R4
S5
R5
S6
R6
S7
R7
S8
R8
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
NOT
IN OUT
OR
B1
B2
O
AND
B1
B2
O
AND
B1
B2
O
AND
B1
B2
O
AND
B1
B2
O
SPCGGIO1_O2
SPCGGIO1_O3
SPCGGIO1_O4
SPCGGIO1_O5
SPCGGIO1_O6
SG2_CHANGE
SG3_CHANGE
SG4_CHANGE
SG5_CHANGE
SG6_CHANGE
TRIP_FAIL_ALARM
SRGAPC1_R1
SRGAPC1_R2
SRGAPC1_R3
SRGAPC1_R4
SRGAPC1_R5
DLCM1_LCM_SET_GROUP_CHANGE
DLCM1_LCM_SET_GROUP_CHANGE
SPCGGIO1_O11_BAT_TEST
BAT_TST_RESET
SCCBRBRF1_50BF_TRBU
THREE_PHASE_OPEN
BAT_TST_STARTED