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5. Operation
5.1.
Basic Operation
5.1.12. Each Measuring Item Display during Power Transmission
The following table shows symbol display (±) for each measured value according to the power transmission
state.
For details on how to switch 2 quadrant/4 quadrant measurement, refer to
For details on how to switch the IEC mode setting, refer to
5.1.13. Demand Time Period and Demand Value of Current demand
The demand time period (
t
0
) represents a time period until a measured value (
I
0
) displays 95% of the input (I)
when continuously energized by constant input (I). To display 100% of the input (I), approximately three times
the time period (to) is required.
The demand value represents a measured display value with the above feature on time period and it indicates
the overall average value within the demand time period.
The demand value changes over a relatively long time period. Therefore, it is not affected by input change for a
short time. Accordingly, it is suitable to monitor overload of transformer.
Power
transmission
state
Measuring item
Imported
lag
Imported
lead
Exported
lag
Exported
lead
A, DA, AN, DAN, V,
Hz, VA, HI, HV, HI
N
Unsigned
W
Unsigned
‘-‘ sign
var
Normal mode
(
2 quadrant
measurement
)
Unsigned
‘-‘ sign
‘-‘ sign
Unsigned
Normal mode
(
4 quadrant
measurement
)
Unsigned
‘-‘ sign
Unsigned
‘-‘ sign
IEC mode
(
2 quadrant
measurement
)
Unsigned
‘-‘ sign
‘-‘ sign
Unsigned
PF
Normal mode
(
2 quadrant
measurement
)
Unsigned
‘-‘ sign
‘-‘ sign
Unsigned
Normal mode
(
4 quadrant
measurement
)
Unsigned
‘-‘ sign
Unsigned
‘-‘ sign
IEC mode
(
2 quadrant
measurement
)
Unsigned
‘-‘ sign
Unsigned
‘-‘ sign
+W
-W
+var
-var
Exported lag
Imported lead
Exported lead
Imported lag
Ⅰ
Measured
value
Time (t)
(Ⅰ
0
)
t
0
(Time period)
0.95
Ⅰ
Содержание ME96SSEB-MB
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