5. Operation
69
5.1.
Basic Operation
Reactive energy counting method (2 quadrant counting / 4 quadrant counting)
There are the following two types of quadrants for counting reactive energy.
Counting
method
Description
4 quadrant
counting
It is counting (Imported lag), (Exported lead),(Imported lead) and (Exported lag) respectively as division of one. In general, it is
counted by this method. However, at the boundary of each division, there is a dead region. It is suitable for the counting of
equipment with the private electric generator.
2 quadrant
counting
(Imported lag) and (Exported lead) are counted as division of one. (Imported lead) and (Exported lag) are counted as division
of one. The dead region is made only nearby var=0 (power factor = 1). Therefore, because the dead region is not made
nearby
power factor = 0. It is suitable for the counting of equipment without the private electric generator and the reactive
power of the capacitor load at the power factor = 0, generally.
The counting method for reactive energy (varh) is switched by “Expanded counting” in the Setting Menu 3.
Also, if setting of “IEC mode” in the Setting Menu 8 is ON, the counting method becomes 2 quadrant counting regardless of “Expanded
counting” in the Setting Menu 3.
If setting of “Expanded counting” is selected for 4 quadrant counting and setting of “IEC mode” is ON, the screens of “exported lag” and
“exported lag” appear, but these are not counting.
(Refer to page 32 about “Expanded counting” in the Setting Menu 3. Refer to page 47 about “IEC mode” in the Setting Menu 8.)
Each measurement item display during power transmission
The following table shows the symbol display (±) for each measurement value according to the power reception /power sending status.
(Refer to page 32 about “Expanded counting” in the Setting Menu 3. Refer to page 47 about “IEC mode” in the Setting Menu 8.)
Quadrant
Measured items
Imported Lag
Imported Lead
Exported Lag
Exported Lead
A,DA,N-A,N-DA,V,Hz,VA
HI,N-HI,HV
Unsigned
W
Unsigned
”
-
”sign
var
Normal mode
(For 2 quadrant
counting)
Unsigned
display
※
“
-
”sign
display
※
“
-
”sign
display
※
Unsigned
display
※
Normal mode
(For 4 quadrant
counting)
Unsigned
display
※
“
-
”sign
display
※
Unsigned
display
※
“
-
”sign
display
※
IEC mode
(For 2 quadrant
counting)
Unsigned
display
※
“
-
”sign
display
※
“
-
”sign
display
※
Unsigned
display
※
PF
Normal mode
(For 2 quadrant
counting)
Unsigned
display
※
“
-
”sign
display
※
“
-
”sign
display
※
Unsigned
display
※
Normal mode
(For 4 quadrant
counting)
Unsigned
display
※
“
-
”sign
display
※
Unsigned
display
※
“
-
”sign
display
※
IEC mode
(For 2 quadrant
counting)
Unsigned
display
※
“
-
”sign
display
※
Unsigned
display
※
“
-
”sign
display
※
※
Turns on when displayed on the bar graph.
+
W
+
W
-
W
+
var
-
var
Exported lag
Imported lead
Exported lead
Imported lag
+
W
-
W
+
var
-
var
+
W
-
W
+
var
-
var
<4 quadrant counting>
<2 quadrant counting>
Exported lag
Imported lead
Exported lead
Imported lag
Exported lag
Imported lead
Exported lead
Imported lag
Содержание ME96SSRA-MB
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