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Section 3
IED application
1MRK504089-UEN C
commissioning of the IED the reference channel can be changed to facilitate testing
and service values reading.
The availability of VT inputs depends on the ordered transformer
input module (TRM) type.
3.2.2
Setting guidelines
The available setting parameters related to analog inputs are
depending on the actual hardware (TM) and the logic configuration
made in PCM600.
3.2.2.1
Setting of the phase reference channel
All phase angles are calculated in relation to a defined reference. An appropriate
analog input channel is selected and used as phase reference. The parameter
PhaseAngleRef defines the analog channel that is used as phase angle reference.
Example
The setting PhaseAngleRef=10 shall be used if a phase-to-earth voltage (usually
the L1 phase-to-earth voltage connected to VT channel number 10 of the analog
card) is selected to be the phase reference.
Setting of current channels
The direction of a current to the IED is depending on the connection of the CT.
Unless indicated otherwise, the main CTs are supposed to be star connected and
can be connected with the earthing point to the object or from the object. This
information must be set to the IED. The convention of the directionality is defined
as follows: A positive value of current, power, and so on means that the quantity
has the direction into the object and a negative value means direction out from the
object. For directional functions the direction into the object is defined as Forward
and the direction out from the object is defined as Reverse. See figure 1
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Application manual