3.4.3.1 Functional diagrams for protection
The functional diagrams describe the relay's protection functionality in detail and
according to the factory set default connections.
Four overcurrent stages are offered for overcurrent and short-circuit protection. Three of
them include directional functionality DPHxPDOC_67/5xP. Three-phase non-directional
overcurrent protection, instantaneous stage, PHIPTOC1_50P-3 can be blocked by
energizing the binary input X120: BI1.
PHIPTOC1
O:14|T:2.5|I:1
BLOCK
ENA_MULT
TRIP
PICKUP
PHIPTOC1_50P-3_TRIP
PHIPTOC1_50P-3_PICKUP
X120_BI1_EXT_OC_BLOCKING
DPHHPDOC1
O:16|T:5|I:1
BLOCK
ENA_MULT
NON_DIR
TRIP
PICKUP
DPHLPDOC1
O:17|T:5|I:1
BLOCK
ENA_MULT
NON_DIR
TRIP
PICKUP
DPHLPDOC2
O:48|T:5|I:2
BLOCK
ENA_MULT
NON_DIR
TRIP
PICKUP
OR6
O:131|T:2.5|I:58
B1
B2
B3
B4
B5
B6
O
DPHLPDOC2_67/51P-2_TRIP
DPHLPDOC2_67/51P-2_TRIP
DPHHPDOC1_67/50P-1_TRIP
DPHHPDOC1_67/50P-1_TRIP
DPHLPDOC1_67/51P-1_TRIP
DPHLPDOC1_67/51P-1_TRIP
DPHLPDOC1_67/51P-1_PICKUP
DPHLPDOC2_67/51P-2_PICKUP
DPHHPDOC1_67/50P-1_PICKUP
DPHxPDOC_TRIP
GUID-EDE3AC51-FC5F-4BCB-A1C1-EEA8AB7DA641 V1 EN
Figure 54: Overcurrent protection functions
The upstream blocking from the pickup of the second low stage of three-phase directional
overcurrent protection DPHLPDOC2_67/51P-2 is connected to the binary output
X110:SO1. This output can be used for sending a blocking signal to the relevant
overcurrent protection stage of the relay at the infeeding bay.
1MAC109016-MB C Section 3
REF615 standard configurations
REF615 ANSI 73
Application Manual
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