Analog Inputs; Introduction; Setting Guidelines; Setting Of The Phase Reference Channel - Hitachi Relion 670 Series Applications Manual

1MRK506375-UEN Rev. N
Section 4
4.1

Introduction

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.
Under the Logical Node AISVBAS, the TRM channel for phase angle reference PhaseAngleRef can
be defined to facilitate service values reading. This TRM channel's phase angle will always be forced
to zero degrees and remaining analog channel's phase angle information will be shown in relation to
this channel. During testing and commissioning of the IED, the reference channel can be changed to
facilitate testing and service values reading.
4.2

Setting guidelines

4.2.1

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.
4.2.1.1

Example

Usually the L1 phase-to-earth voltage connected to the first VT channel number of the transformer
input module (TRM) is selected as the phase reference. The first VT channel number depends on the
type of transformer input module.
For a TRM with 7 current and 5 voltage inputs the first VT channel is 8. The setting
PhaseAngleRef=8 shall be used if the phase reference voltage is connected to that channel.
Railway application RER670
Application manual

Analog inputs

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.
In RER670 7I+5U TRM is always used. However several variants exist in order to cover
1A and/or 5A main CTs.
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.
© 2017 - 2023 Hitachi Energy. All rights reserved
Section 4
Analog inputs
SEMOD55003-5 v11
SEMOD55068-1 v1
SEMOD130348-4 v5
SEMOD55055-5 v3
SEMOD55055-11 v6
45