ABB Relion 620 Series - Tiepoint Recloser; DLCM Function Block; Phase Selection

Section 3 1MAC308145-MB E
RER620 application
64 RER620
Application Manual
recloser sequence through multiple operations. Though the reclose blocked condition will
change to normal after a programmed amount of time, the control will stay in New Settings
Group until the loop scheme is reset.
3.5.3 Tiepoint Recloser
The Tiepoint recloser, unlike the Sectionalizing and Midpoint recloser is normally open.
It closes in response to a loss of all phase voltages from one source if the other source phase
voltages are live. Once closed, the Tiepoint breaker will trip automatically if a downstream
overcurrent condition exists and is not isolated by the midpoint recloser first. The Tiepoint
recloser can be set to employ different fault thresholds depending on which side of the loop
it is supplying, i.e., which side is downstream. After the close operation, it also is set to go
into non-reclose mode for a period of time in the event the fault is between the Midpoint
and Tiepoint. If the control changed to New Settings Group for the close operation, it will
remain in that setting group until the Recloser is opened and the loop scheme is reset.
3.5.4 DLCM Function Block
The Loop Control Module (DLCM) function is configured in RER620 as a part of its
default configuration as shown in Figure 46.
Figure 46: DLCM Function in ACT configuration
3.5.5 Phase Selection
The identification of source and phases for which, phase status has to be determined is
done in the phase selection.
The loop control is operated in 4 modes as "Sectionalize", "Mid-point", "Tie-point" or
"Disabled" in LCM Mode setting.
The Line side src setting can be selected as "S1" or "S2" to select the respective source as
line side source. If the power is flowing from S1 to S2 then the Line side src is selected as
"S1" and vice versa.
The condition for any source to be enabled in sectionalizer or midpoint modes is that, the
respective source should be selected as Line side source and Vt line enable should be
"TRUE" and the corresponding source enable input should be activated through push
buttons 13 & 14 [Key 13 & Key 14] in LHMI ,circled in the Figure 47.
DLCM1(LCM;LCM)
S1_EN_IN
S2_EN_IN
RESET_IN
BLOCK
LCM_TRIP
SET_GROUP_CHANGE
LCM_CLOSE
S1_STATUS
S2_STATUS
SWOTF
NON_RECLOSE
S1_DISABLED
S2_DISABLED
RESET_OUT
DLCM1_LCM_RESET_OUT
DLCM1_LCM_S2_EN
DLCM1_LCM_S1_EN
DLCM1_LCM_SET_GROUP_CHANGE
DLCM1_LCM_CLOSE
DLCM1_LCM_TRIP
DLCM1_LCM_SWOTF
SPCGGIO1_O15_DLCM1_RESET_IN
SPCGGIO1_O14_DLCM1_S2_EN
SPCGGIO1_O13_DLCM1_S1_EN