ABB relion REF615 - Page 212

EFPADM1
BLOCK
RELEASE
OPERATE
START
EFPADM2
BLOCK
RELEASE
OPERATE
START
EFPADM3
BLOCK
RELEASE
OPERATE
START
OR6
B1
B2
B3
B4
B5
B6
O
EFPADM1_OPERATE
EFPADM1_OPERATE
EFPADM2_OPERATE
EFPADM2_OPERATE
EFPADM3_OPERATE
EFPADM3_OPERATE
EFPADM1_START
EFPADM2_START
EFPADM3_START
EFPADM_OPERATE
GUID-80B32305-038A-4261-AF02-E3E0884E5070 V1 EN
Figure 286: Admittance-based earth-fault protection function
Non-directional (cross-country) earth-fault protection, using calculated Io,
EFHPTOC1 protects against double earth-fault situations in isolated or compensated
networks. This protection function uses the calculated residual current originating
from the phase currents. Function is blocked in case of detection of a failure in
secondary circuit of sensor.
EFHPTOC1
BLOCK
ENA_MULT
OPERATE
START
EFHPTOC1_OPERATE
EFHPTOC1_START
CCSPVC1_FAIL
GUID-AD3B6BA3-857E-44BF-9739-2F1D1AADA63B V2 EN
Figure 287: Earth-fault protection function
Phase discontinuity protection PDNSPTOC1 protects for interruptions in the normal
three-phase load supply, for example, in downed conductor situations. The function is
blocked in case of detection of a failure in secondary circuit of sensor.
PDNSPTOC1
BLOCK OPERATE
START
PDNSPTOC1_OPERATE
PDNSPTOC1_START
CCSPVC1_FAIL
GUID-A735E86D-1AB7-44FE-B59D-A83FF8EC8362 V2 EN
Figure 288: Phase discontinuity protection function
Three-phase thermal protection for feeders, cables and distribution transformers
T1PTTR1 detects overloads under varying load conditions. The BLK_CLOSE output
of the function is used to block the closing operation of circuit breaker.
Section 3 1MRS756378 S
REF615 standard configurations
206 REF615
Application Manual