Hitachi Relion 650 Series Technical Manual page 212

Section 12
Monitoring
External analog
signals
IEC05000653 V2 EN-US
Figure 104: Analog input function blocks
The external input signals will be acquired, filtered and skewed and (after configuration) available as
an input signal on the AxRADR function block via the SMAI function block. The information is saved
at the Disturbance report base sampling rate (4000 and 4800 Hz). Internally calculated signals are
updated according to the cycle time of the specific function. If a function is running at lower speed
than the base sampling rate, Disturbance recorder will use the latest updated sample until a new
updated sample is available.
Application configuration tool (ACT) is used for analog configuration of the Disturbance report.
The preprocessor function block (SMAI) calculates the residual quantities in cases where only the
three phases are connected (AI4-input not used). SMAI makes the information available as a group
signal output, phase outputs and calculated residual output (AIN-output). In situations where AI4-
input is used as an input signal the corresponding information is available on the non-calculated
output (AI4) on the SMAI function block. Connect the signals to the AxRADR accordingly.
For each of the analog signals, Operation = On means that it is recorded by the disturbance recorder.
The trigger is independent of the setting of Operation, and triggers even if operation is set to Off.
Both undervoltage and overvoltage can be used as trigger conditions. The same applies for the
current signals.
If Operation = Off, no waveform (samples) will be recorded and reported in graph. However, Trip
value, pre-fault and fault value will be recorded and reported. The input channel can still be used to
trig the disturbance recorder.
If Operation = On, waveform (samples) will also be recorded and reported in graph.
The analog signals are presented only in the disturbance recording, but they affect the entire
disturbance report when being used as triggers.
206
SMAI
GRPNAME AI3P
AI1NAME AI1
AI2NAME AI2
AI3NAME AI3
AI4NAME AI4
AIN
Internal analog signals
© 2021 Hitachi Energy. All rights reserved.
A1RADR
A2RADR
GRPINPUT1
A3RADR
GRPINPUT2
GRPINPUT3
GRPINPUT4
GRPINPUT5
GRPINPUT6
...
A4RADR
INPUT31
INPUT32
INPUT33
INPUT34
INPUT35
INPUT36
...
INPUT40
en05000653-2.vsd
1MRK 511 557-UEN Rev. A
Technical Manual