The phase voltages to the IED are fed from a voltage transformer. The residual voltage
to the IED is fed from either residually connected VTs, an open delta connected VT
or internally calculated.
The IED offers six different settings groups which can be set based on individual
needs. Each group can be activated or deactivated using the setting group settings
available in the IED.
Depending on the communication protocol the required function block needs to be
instantiated in the configuration.
3.14.3.1 Functional diagrams for protection
The functional diagrams describe the IEDs protection functionality in detail and
according to the factory set default connections.
Four non-directional overcurrent stage and three directional overcurrent stages are
offered for overcurrent and short-circuit protection. Three-phase non-directional
overcurrent protection, instantaneous stage PHIPTOC1 can be blocked by energizing
the binary input X120: BI1.
PHIPTOC1
BLOCK
ENA_MULT
OPERATE
START
PHLPTOC1
BLOCK
ENA_MULT
OPERATE
START
PHHPTOC1
BLOCK
ENA_MULT
OPERATE
START
PHLPTOC2
BLOCK
ENA_MULT
OPERATE
START
OR6
B1
B2
B3
B4
B5
B6
O
PHIPTOC1_OPERATE
PHIPTOC1_OPERATE
PHLPTOC1_OPERATE
PHLPTOC1_OPERATE
PHHPTOC1_OPERATE
PHHPTOC1_OPERATE
PHLPTOC2_OPERATE
PHLPTOC2_OPERATE
PHLPTOC1_START
PHHPTOC1_START
PHLPTOC2_START
PHIPTOC1_START
X120_BI1_EXT_OC_BLOCKING
PHxPTOC_OPERATE
GUID-6C6E7FFE-4CA7-4DFF-BA88-36F4C1EE19DA V1 EN
Figure 562: Overcurrent protection functions
1MRS756378 S Section 3
REF615 standard configurations
REF615 359
Application Manual
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