Name
Range
Step
Default
Description
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.
Curve 1...4 input
-1 000
000.00...1 000
000.00
0.00001 -
Displays the input measurement received by the curve.
Curve1...4 input
maximum
-1 000
000.00...1 000
000.00
0.00001 0
Defines the maximum input of the curve. If input is above the
set limit, "ASC1...4 input out of range" is activated.
Curve1...4 output
-1 000
000.00...1 000
000.00
0.00001 -
Displays the output of the curve.
The input signal filtering parameter calculates the average of received signals according to the set time
constant. This is why rapid changes and disturbances (such as fast spikes) are smothered. The Nyquist
rate states that the filter time constant must be at least double the period time of the disturbance
process signal. For example, the value for the filter time constant is 2 seconds for a 1 second period
time of a disturbance oscillation.
When the curve signal is out of range, it activates the "ASC1...4 input out of range" signal, which can
be used inside logic or with other relay functions. The signal can be assigned directly to an output relay
or to an LED in the I/O matrix. The "Out of range" signal is activated, when the measured signal falls
below the set input minimum limit, or when it exceeds the input maximum limit.
If for some reason the input signal is lost, the value is fixed to the last actual measured cycle value. The
value does not go down to the minimum if it has been something else at the time of the signal breaking.
A
AQ
Q-M257
-M257
Instruction manual
Version: 2.07
362
© Arcteq Relays Ltd
IM00021
Summary of Contents for AQ-M257
Page 1: ...AQ M257 Motor protection IED Instruction manual...
Page 2: ......
