4 Functions
QE81WH4W
(3) Resolution of measured data
Resolution of measured data according to the rating (phase wire system, primary voltage,
and primary current) is described as follows.
1) Current, current demand
Rated primary current setting
Multiplier
Resolution*
5 A to 30 A
-3
2 digits after the
decimal point
0.01 A
40 A to 300 A
-3
1 digit after the
decimal point
0.1 A
400 A to 3000 A
-3
Integer
1 A
4000 A to 6000 A
-3
×10
10 A
* Digits lower than the resolution are fixed to 0.
2) Voltage
a. When not use voltage transformer
Input voltage setting
Multiplier
Resolution*
63.5 / 110 V to 277 / 480 V
-3
1 digit after the
decimal point
0.1 V
b. When use voltage transformer
Rated primary voltage setting
Multiplier
Resolution*
1 V to 329 V
-3
1 digit after the
decimal point
0.1 V
330 V to 2299 V
-3
Integer
1 V
3300 V to 6600 V
-3
×10
10 V
* Digits lower than the resolution are fixed to 0.
3) Electric power, electric power demand, reactive power, apparent power
Full load power W
*1*3
Multiplier
Resolution*
2*3
Ⅰ
. W <12 kW
-3
3 digits after the
decimal point
0.001 kW
Ⅱ
. 12 kW
≤
W < 120 kW
-3
2 digits after the
decimal point
0.01 kW
Ⅲ
. 120 kW
≤
W < 1200 kW
-3
1 digit after the
decimal point
0.1 kW
Ⅳ
. 1200 kW
≤
W < 12000 kW
-3
Integer
1 kW
Ⅴ
.12000 kW
≤
W < 120000 kW
-3
×10 10
kW
*1
Full load power W can be calculated by the following equation:
In addition, for calculating full load power W, refer to Table 4.2.1-1 (pages 4 to 5).
Full load power W [kW] = 3
×
(VT primary voltage)
×
(CT primary current) / 1000
Primary voltage = voltage (L-N) of input voltage (when not use voltage transformer)
= primary voltage of voltage transformer (when use voltage transformer)
*2
Digits lower than the resolution are fixed to 0.
*3
In the case of reactive power, the unit will be kvar.
In the case of apparent power, the unit will be kVA
4) Power factor
Power factor
Multiplier
Resolution*
All setting ranges
-3
1 digit after the
decimal point
0.1%
* Digits lower than the resolution are fixed to 0.
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