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1MAC050144-MB C
Section 3
Basic functions
615 series ANSI
73
Technical Manual
setting to “Ohm”. When
Value unit
is set to “Ohm”, the linear scaling is not possible, but
the default range (0…2000
Ω
) can be set smaller with the
Value maximum
and
Value
minimum
settings.
3.10.5
Input linear scaling
Each RTD/mA input can be scaled linearly by the construction of a linear output function
in respect to the input. The curve consists of two points, where the y-axis (
Input minimum
and
Input maximum
) defines the input range and the x-axis (
Value minimum
and
Value
maximum
) is the range of the scaled value of the input.
Example for linear scaling
Milli-ampere input is used as tap changer position information. The sensor informationis
from 4 mA to 20 mA that is equivalent to the tap changer position from -36 to
36,respectively.
Figure 9:
Milli-ampere input scaled to tap changer position information
3.10.6
Measurement chain supervision
Each input contains functionality to monitor the input measurement chain. The circuitry
monitors the RTD channels continuously and reports a circuitry break of any enabled input
channel. If the measured input value is outside the limits, minimum/maximum value is
shown in the corresponding output. The quality of the corresponding output is set
accordingly to indicate misbehavior in the RTD/mA input.
The input scaling can be bypassed by selecting
Value unit
= "Ohm" when
Input mode
= "Resistance" is used and by selecting
Value unit
= "Ampere"
when
Input mode
= "0...20 mA" is used.
Input maximum
Input minimum
Input mode
”0..20mA”
4 mA
20 mA
Value minimum
-36
AI_VAL#
Value maximum
36
Value unit
”Dimensionless”
X130-Input#
*8,'$(')$($$'9(1
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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