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24
Useful Information
Installation
19
Digital Output 2
23
26
25
■
What is ASY
The ASY variable allows the user to control the symmetry of
the delta voltages (for systems without neutral) and star volt-
ages (for systems with neutral). The variable is calculated
according to the following formula:
Where:
Vmax is the max. value among VL1-N, VL2-N, VL3-N
Vmin is the min. value among VL1-N, VL2-N, VL3-N
Vavg is the average: (VL1-N, VL2-N, VL3-N)/3
The variable is not displayed by the instrument, but can be
retransmitted by the analogue or RS422 / 485 output and
can be controlled by means of the alarm.
■
Retransmitted variables
Vmax - Vmin
Vavg
*100
ASY=
N°
Variable
3-ph with
3-ph with-
Notes
neutral
out neutral
1
V L-N
Σ
x
Σ
= system
2
V L-L
Σ
x
x
Σ
= system
3
W
Σ
x
x
Σ
= system
4
var
Σ
x
x
Σ
= system
5
VA
Σ
x
x
Σ
= system
6
PF
Σ
x
x
Σ
= system
7
PF
x
x
8
VA dmd
x
x
9
W dmd
x
x
10
ASY
x
x
asymmetry
11
The energy meters as per table on page 17
12
All instantaneous variables (powers, currents, voltages)
