ABB Relion 615 series - Page 182

Two negative-sequence overcurrent protection NSPTOC1_46-1 and NSPTOC2_46-2
stages are provided for phase unbalance protection. These functions are used to protect the
feeder against phase unbalance.
The operation of NSPTOC1_46-1 and NSPTOC2_46-2 is not blocked as default by any
functionality. The pickup signals are connected to OC_PICKUP_ALARM variable in
logic.
NSPTOC1
O:22|T:5|I:1
BLOCK
ENA_MULT
TRIP
PICKUP
NSPTOC2
O:33|T:5|I:2
BLOCK
ENA_MULT
TRIP
PICKUP
NSPTOC1_46-1_PICKUP
NSPTOC2_46-2_PICKUP
NSPTOC1_46-1_TRIP
NSPTOC2_46-2_TRIP
CCRDIF1_CCM_FAIL
CCRDIF1_CCM_FAIL
GUID-B453FA0D-0D15-4FC5-A270-5C2B66CFA1B3 V1 EN
Figure 230: Negative-sequence overcurrent protection
All overcurrent pickup signals are merged together as variable OC_PICKUP_ALARM.
This alarm is by default connected to disturbance recorder channel. It can be mapped also,
for example, for alarming or blocking purposes to the binary output relays.
OR6
O:64|T:2.5|I:5
B1
B2
B3
B4
B5
B6
O
OR6
O:63|T:2.5|I:9
B1
B2
B3
B4
B5
B6
O
OR6
O:65|T:2.5|I:24
B1
B2
B3
B4
B5
B6
O
OR6
O:72|T:2.5|I:25
B1
B2
B3
B4
B5
B6
O
PHLPTOC1_51P-1_PICKUP
PHHPTOC1_50P-1_PICKUP
PHHPTOC2_50P-2_PICKUP
NSPTOC1_46-1_PICKUP
PHIPTOC1_50P-3_PICKUP
EFIPTOC1_50G-3_PICKUP
NSPTOC2_46-2_PICKUP
EFLPTOC2_51N-1_PICKUP
EFHPTOC3_50N-1_PICKUP
EFHPTOC4_50N-2_PICKUP
EFIPTOC2_50N-3_PICKUP
DPHHPDOC1_67/50P-1_PICKUP
DPHHPDOC2_67/50P-2_PICKUP
EFHPTOC2_50G-2_PICKUP
DEFHPDEF2_67_50N-2_PICKUP
DEFHPDEF1_67_50N-1_PICKUP
OC(1)_PICKUP_ALARM
GUID-002DF69E-AAD7-48E4-B7CD-8FC751D2DCE6 V1 EN
Figure 231: Overcurrent pickup alarm
Two overvoltage and undervoltage protection stages PHPTUV1_27-1, PHPTUV2_27-2
and PHPTOV1_59-1, PHPTOV2_59-2 offer protection against abnormal phase voltage
conditions. A failure in the voltage measuring circuit is detected by the fuse failure
function and the activation is connected to undervoltage protection functions to avoid
faulty undervoltage tripping.
Section 3 1MAC109016-MB C
REF615 standard configurations
176 REF615 ANSI
Application Manual