ABB RELION 615 Series Applications Manual page 179

1MAC109016-MB C
REF615 ANSI
Application Manual
SEQRFUF1_60-1_FUSEF_U
SEQRFUF1_60-1_FUSEF_U
GUID-01F74092-5C0E-4BC3-B764-38BE52522F18 V1 EN
Figure 226: Under current and directional overcurrent protections
Four stages are provided to non-directional neutral overcurrent protection. Additionally
depending on order option, one stage is offered as a sensitive ground-fault protection. The
neutral overcurrent protection uses calculated residual current component.
The operation of EFLPTOC1_51N-1, EFHPTOC1_50N-1, EFHPTOC2_50N-2 and
EFHPTOC3_50N-3 are by default, not blocked by an external blocking input, but this can
be done through a binary input. EFHPTOC1_50N-1 is also blocked if the cold load
detection logic is activated.
REF615 standard configurations
PHPTUC1
BLOCK TRIP
TRIP_A
TRIP_B
TRIP_C
PICKUP
PICKUP_A
PICKUP_B
PICKUP_C
O:77|T:5|I:1
DPHHPDOC1
BLOCK TRIP
ENA_MULT PICKUP
NON_DIR
O:28|T:5|I:1
DPHHPDOC2
BLOCK TRIP
ENA_MULT PICKUP
NON_DIR
O:29|T:5|I:2
Section 3
PHPTUC1_37-1_TRIP
DPHHPDOC1_67/50P-1_TRIP
DPHHPDOC1_67/50P-1_PICKUP
DPHHPDOC2_67/50P-2_TRIP
DPHHPDOC2_67/50P-2_PICKUP
173