ABB RELION 615 Series Applications Manual page 45

1MRS758955 A
REV615
Application Manual
PHIPTOC1_OPERATE
PHLPTOC1_OPERATE
PHHPTOC1_OPERATE
PHHPTOC2_OPERATE
GUID-6E8841C3-F6CA-400D-8FB4-334950973E62 V1 EN
Figure 13: Overcurrent protection functions
Two negative-sequence overcurrent protection stages NSPTOC1 and NSPTOC2 are
provided for phase unbalance protection. These functions are used to protect the
capacitor against unbalance conditions. The negative-sequence overcurrent
protection functions are blocked in case of detection of a failure in the secondary
circuit of current transformer.
REV615 standard configurations
PHIPTOC1
BLOCK OPERATE
ENA_MULT START
PHHPTOC1
BLOCK OPERATE
ENA_MULT START
PHHPTOC2
BLOCK OPERATE
ENA_MULT START
PHLPTOC1
BLOCK OPERATE
ENA_MULT START
OR6
B1 O
B2
B3
B4
B5
B6
Section 3
PHIPTOC1_OPERATE
PHIPTOC1_START
PHHPTOC1_OPERATE
PHHPTOC1_START
PHHPTOC2_OPERATE
PHHPTOC2_START
PHLPTOC1_OPERATE
PHLPTOC1_START
OC_OPERATE
39