ABB relion REF615 - Page 127

EFHPTOC1
BLOCK
ENA_MULT
OPERATE
START
EFLPTOC1
BLOCK
ENA_MULT
OPERATE
START
EFIPTOC1
BLOCK
ENA_MULT
OPERATE
START
OR6
B1
B2
B3
B4
B5
B6
O
EFLPTOC1_OPERATE
EFLPTOC1_OPERATE
EFHPTOC1_OPERATE
EFHPTOC1_OPERATE
EFIPTOC1_OPERATE
EFIPTOC1_OPERATE
EFLPTOC1_START
EFIPTOC1_START
EFHPTOC1_START
EFxPTOC_OPERATE
GUID-4B3BC21D-415D-4301-9B92-887AEA80C49C V1 EN
Figure 132: Earth-fault protection functions
EFLPTOC2
BLOCK
ENA_MULT
OPERATE
START
EFLPTOC2_OPERATE
EFLPTOC2_START
GUID-66EBDD29-6D5B-4ACE-9000-3F9976978F27 V1 EN
Figure 133: Sensitive earth-fault protection functions
Phase discontinuity protection PDNSPTOC1 protects from interruptions in the
normal three-phase load supply, for example, in downed conductor situations.
PDNSPTOC1
BLOCK OPERATE
START
PDNSPTOC1_OPERATE
PDNSPTOC1_START
GUID-E1FF7992-706A-417E-8944-AF34E8E729FB V1 EN
Figure 134: Phase discontinuity protection
Three-phase thermal protection for feeders, cables and distribution transformers
T1PTTR1 detects overloads under varying load conditions. The output BLK_CLOSE
is used to block the closing operation of circuit breaker.
T1PTTR1
BLK_OPR
ENA_MULT
TEMP_AMB
OPERATE
START
ALARM
BLK_CLOSE
T1PTTR1_START
T1PTTR1_OPERATE
T1PTTR1_ALARM
GUID-E345F8CC-BD77-4DE5-AEAC-12969F8F4A74 V1 EN
Figure 135: Thermal overcurrent protection function
1MRS756378 S Section 3
REF615 standard configurations
REF615 121
Application Manual