ABB RELION 615 Series Applications Manual page 180

Section 3
REF615 standard configurations
CLD_62_1_TRIP
CCRDIF1_CCM_FAIL
GUID-B825E105-AA47-441D-B674-6F8687FCBCA2 V1 EN
Figure 227: Non-directional calculated neutral overcurrent protection
174
CCRDIF1_CCM_FAIL
OR
B1 O
B2
O:13|T:2.5|I:20
CCRDIF1_CCM_FAIL
CCRDIF1_CCM_FAIL
Four stages are provided to non-directional ground-fault protection. Additionally
depending on order option, one stage is offered as a sensitive ground-fault protection. The
ground-fault protection uses measured residual current component.
The operation of EFLPTOC1_51G, EFHPTOC2_51G-2 and EFHPTOC3_51G-3 are by
default, not blocked by an external blocking input, but this can be done through a binary
input.
EFLPTOC2
BLOCK TRIP
ENA_MULT PICKUP
O:27|T:5|I:2
EFHPTOC3
BLOCK TRIP
ENA_MULT PICKUP
O:21|T:5|I:3
EFHPTOC4
BLOCK TRIP
ENA_MULT PICKUP
O:23|T:5|I:4
EFIPTOC2
BLOCK TRIP
ENA_MULT PICKUP
O:30|T:2.5|I:2
1MAC109016-MB C
EFLPTOC2_51N-1_TRIP
EFLPTOC2_51N-1_PICKUP
EFHPTOC3_50N-1_TRIP
EFHPTOC3_50N-1_PICKUP
EFHPTOC4_50N-2_TRIP
EFHPTOC4_50N-2_PICKUP
EFIPTOC2_50N-3_TRIP
EFIPTOC2_50N-3_PICKUP
REF615 ANSI
Application Manual