ABB RELION 615 Series Applications Manual page 182

Section 3
REF615 standard configurations
176
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.
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.
B1
PHLPTOC1_51P-1_PICKUP
B2
PHHPTOC1_50P-1_PICKUP
B3
PHHPTOC2_50P-2_PICKUP
B4
EFLPTOC2_51N-1_PICKUP
B5
EFHPTOC3_50N-1_PICKUP
B6
EFHPTOC4_50N-2_PICKUP
B1
NSPTOC1_46-1_PICKUP
B2
PHIPTOC1_50P-3_PICKUP
B3
EFIPTOC2_50N-3_PICKUP
B4
DPHHPDOC1_67/50P-1_PICKUP
B5
DPHHPDOC2_67/50P-2_PICKUP
B6
B1
DEFHPDEF1_67_50N-1_PICKUP
B2
DEFHPDEF2_67_50N-2_PICKUP
B3
EFHPTOC2_50G-2_PICKUP
B4
EFIPTOC1_50G-3_PICKUP
B5
NSPTOC2_46-2_PICKUP
B6
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.
NSPTOC1
BLOCK TRIP
ENA_MULT PICKUP
O:22|T:5|I:1
NSPTOC2
BLOCK TRIP
ENA_MULT PICKUP
O:33|T:5|I:2
OR6
O B1
B2
B3
B4
B5
B6
O:64|T:2.5|I:5 O:72|T:2.5|I:25
OR6
O
O:63|T:2.5|I:9
OR6
O
O:65|T:2.5|I:24
1MAC109016-MB C
NSPTOC1_46-1_TRIP
NSPTOC1_46-1_PICKUP
NSPTOC2_46-2_TRIP
NSPTOC2_46-2_PICKUP
OR6
O
OC(1)_PICKUP_ALARM
REF615 ANSI
Application Manual