Event block name
Event names
PCS
Switch 4 ON
PCS
Switch 4 OFF
PCS
Switch 5 ON
PCS
Switch 5 OFF
5.4.6 Analog input scaling curves
Sometimes when measuring with RTD inputs, milliampere inputs and digital inputs the measurement
might be inaccurate because the signal coming from the source is inaccurate. One common example
of this is tap changer location indication signal not changing linearly from step to step. If the output
difference between the steps are not equal to each other, measuring the incoming signal accurately is
not enough. "Analog input scaling curves" menu can be used to take these inaccuracies into account.
Analog input scaling curve settings can be found at
Measurement
→
AI(mA, DI volt) scaling menu.
Currently following measurements can be scaled with analog input scaling curves:
• RTD inputs and mA inputs in "RTD & mA input" option cards
• mA inputs in "mA output & mA input" option cards
• Digital input voltages
Table. 5.4.6 - 123. Main settings (input channel).
Name
Range
Step
Default
Description
Analog input
scaling
0: Disabled
1: Activated
-
0:
Disabled Enables and disables the input.
Scaling curve 1...4
0: Disabled
1: Activated
-
0:
Disabled
Enables and disables the scaling curve and the input
measurement.
Curve 1...4 input
signal select
0: S7 mA Input
1: S8 mA Input
2: S15 mA Input
3: S16 mA Input
4: DI1 Voltage
...
23: DI20 Voltage
24: RTD S1
Resistance
...
39: RTD S16
Resistance
40: mA In 1 (I
card 1)
41: mA In 2 (I
card 2)
-
0: S7
mA
Input
Defines the measurement used by scaling curve.
Curve 1...4 input
signal filtering
0: No
1: Yes
-
0: No
Enables calculation of the average of received signal.
Curve 1...4 input
signal filter time
constant
0.005...3800.000
s
0.005 s
1 s
Time constant for input signal filtering.
This parameter is visible when "Curve 1...4 input signal
filtering" has been set to "Yes".
Curve 1...4 input
signal out of range
set
0: No
1: Yes
-
0: No
Enables out of range signals. If input signal is out of minimum
and maximum limits, "ASC1...4 input out of range" signal is
activated.
Curve1...4 input
minimum
-1 000
000.00...1 000
000.00
0.00001 0
Defines the minimum input of the curve. If input is below the
set limit, "ASC1...4 input out of range" is activated.
A
AQ
Q-T256
-T256
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
IM00028
199
Summary of Contents for AQ-T256
Page 1: ...AQ T256 Transformer protection IED Instruction manual...
Page 2: ......
