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.
3.8.3.1 Functional diagrams for protection
The functional diagrams describe protection functionality of the IEDs 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. 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
PHIPTOC1_OPERATE
PHIPTOC1_START
X120_BI1_EXT_OC_BLOCKING
GUID-B10D3E4D-E329-4FBC-9178-166E6E190603 V1 EN
Figure 222: Overcurrent protection function
1MRS756378 S Section 3
REF615 standard configurations
REF615 171
Application Manual
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