Analog Inputs; Introduction; Setting Guidelines; Setting Of The Phase Reference Channel - ABB RET670 Applications Manual

1MRK504116-UUS C
3.2
3.2.1
3.2.2
3.2.2.1
Application manual
The wide application flexibility makes this product an excellent choice for both new
installations and the refurbishment of existing installations.

Analog inputs

Introduction

Analog input channels must be configured and set properly to get correct measurement
results and correct protection operations. For power measuring and all directional and
differential functions the directions of the input currents must be defined properly.
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.
A reference PhaseAngleRef can be defined to facilitate service values reading. This
analog channels phase angle will always be fixed to zero degrees and all other 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 availability of VT inputs depends on the ordered transformer input
module (TRM) type.

Setting guidelines

The available setting parameters related to analog inputs are depending
on the actual hardware (TRM) and the logic configuration made in
PCM600.

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-ground voltage (usually the
A phase-to-ground voltage connected to VT channel number 10 of the analog card) is
selected to be the phase reference.
Section 3
IED application
33