Download Yokogawa WT110 Digital Power Meter

5.1 Measuring/Displaying Voltage, Current and Active Power
Explanation
Continuous Maximum Allowable Input
• Voltage : peak voltage is 1.5kV, or the RMS value is 1.0kV, whichever is less.
• Current : peak current is 100A or the RMS value is 30A, whichever is less. In case of external
sensor input, the peak value is 5 times the measurement range or less.
Maximum Reading of the Display and Units
• Maximum reading
• Units
• Prefix
: for voltage, current and power, each 9999
: V (voltage), A (current), W (power)
: m, k, M
Selecting the Display Function
The following selections are available.
• V : voltage will be displayed
• A : current will be displayed
• W : power will be displayed
Selecting the Input Element
The type of input element which can be selected depends on the model number. Make your
selection after having verified your model number.
• 1/2/3 : Displays the measurement values of element 1/2/3
•∑
: Displays according to the wiring method, and is as follows.
Wiring method ΣV
V1+V3
1Φ3W
2
ΣA
A1+A3
V1+V3
A1+A3
2
2
3Φ3W
3Φ4W
3V3A
5-2
V1+V2+V3
3
V1+V2+V3
3
2
ΣW
ΣVA
Σvar
W1+W3
V1A1+V3A3
var1+var3
W1+W3
A1+A2+A3 W1+W2+W3
3
A1+A2+A3 W1+W3
3
Wiring method
ΣPF
Σdeg
1Φ3W
3Φ3W
3Φ4W
3V3A
ΣW
ΣVA
cos-1ΣPF
3 ( V1A1+V3A3 )
2
V1A1+V2A2+V3A3
var1+var3
var1+var2+var3
3 (
) var1+var3
3 V1A1+V2A2+V3A3
IM 253401-01E