ABB RELION 615 Series Applications Manual page 113

1MRS758272 B
REG615
Application Manual
BLOCK
GUID-6F446DFB-110D-4271-A44E-4CC01FE8AEBE V2 EN
Figure 139: Inrush detector function
Two negative-sequence overcurrent protection stages MNSPTOC1 and MNSPTOC2
are provided for phase unbalance protection. These functions are used to protect
against unbalance conditions due to unbalance load or unsymmetrical faults.
MNSPTOC1_OPERATE
MNSPTOC2_OPERATE
GUID-EA221211-DF98-4E50-95C1-D7399B66EBE6 V2 EN
Figure 140: Negative sequence overcurrent protection function
One non-directional sensitive earth-fault stage EFHPTOC1 and three directional
earth-fault stages DEFxPDEF are offered for providing primary and backup
protection for generator earth-fault protection. Transient/intermittent earth-fault
protection INTRPTEF is used for transient-based earth-fault protection.
BLOCK
ENA_MULT
RCA_CTL
BLOCK
ENA_MULT
RCA_CTL
BLOCK
ENA_MULT
RCA_CTL
GUID-9DE28768-8BFD-4302-877D-AD11F566A1C4 V2 EN
Figure 141: Directional earth-fault protection function
REG615 standard configurations
INRPHAR1
BLK2H
MNSPTOC1
BLOCK OPERATE
BLK_RESTART
MNSPTOC2
BLOCK OPERATE
BLK_RESTART
OR
B1
B2
DEFHPDEF1
OPERATE
START
DEFLPDEF1
OPERATE
START
DEFLPDEF2
OPERATE
START
Section 3
INRPHAR1_BLK2H
MNSPTOC1_OPERATE
START
MNSPTOC1_START
MNSPTOC2_OPERATE
START
MNSPTOC2_START
O
MNSPTOC_OPERATE
DEFHPDEF1_OPERATE
DEFHPDEF1_START
DEFLPDEF1_OPERATE
DEFLPDEF1_START
DEFLPDEF2_OPERATE
DEFLPDEF2_START
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