ABB REG670 - Section 3 Analog Inputs; Introduction; Function Block

Section 3 Analog inputs
3.1 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.
3.2 Function block
The hardware channels appear in the signal matrix tool (SMT) and in
ACT when a TRM is included in the configuration with the hardware
configuration tool. In the SMT or the ACT they can be mapped to the
desired virtual input (SMAI) of the IED and used internally in the
configuration.
1MRK502052-UEN B Section 3
Analog inputs
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Technical manual