Section 4 Analog inputs
4.1 Introduction
SEMOD55003-5 v11
Analog input channels must be configured and set properly in order to get correct
measurement results and correct protection operations. For power measuring, all
directional and differential functions, the directions of the input currents must be
defined in order to reflect the way the current transformers are installed/connected
in the field ( primary and secondary connections ). Measuring and protection
algorithms in the IED use primary system quantities. Setting values are in primary
quantities as well and it is important to set the data about the connected current and
voltage transformers properly.
An AISVBAS reference PhaseAngleRef can be defined to facilitate service values
reading. This analog channel's phase angle will always be fixed to zero degrees and
remaining analog channel's phase angle information will be shown in relation to
this analog input. During testing and commissioning of the IED, the reference
channel can be changed to facilitate testing and service values reading.
The IED has the ability to receive analog values from primary
equipment, that are sampled by Merging units (MU) connected to a
process bus, via the IEC 61850-9-2 LE protocol.
The availability of VT inputs depends on the ordered transformer
input module (TRM) type.
4.2 Setting guidelines
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The available setting parameters related to analog inputs are
depending on the actual hardware (TRM) and the logic
configuration made in PCM600.
If a second TRM is used, at least one TRM channel must be
configured to get the service values. However, the MU physical
channel must be configured to get service values from that channel.
1MRK 505 393-UEN B Section 4
Analog inputs
Line differential protection RED650 2.2 IEC 39
Application manual
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