3-10
IM WT5000-01EN
Scaling (Scaling)
You can set coefficients for when you apply a voltage or current signal from an external VT (voltage transformer)
or CT (current transformer).
Turning Scaling On and Off (Scaling)
You can select whether to apply the VT ratio, CT ratio, and power coefficient to applicable measurement
functions.
When reading measured values directly by using a VT or CT (or current sensor), select ON. When you select
ON, the “Sc” indicator turns on in the input information area on the right side of the screen.
Applicable Measurement Functions
Voltage (U), current (I), power (P, S, and Q), maximum and minimum voltages (U+pk and U-pk), and maximum
and minimum currents (I+pk and I-pk)
• ON: The measurement functions above are multiplied by the VT ratio, CT ratio, or power coefficient.
• OFF: The measurement functions above are not multiplied by the VT ratio, CT ratio, or power coefficient. The
output values of the VT and CT are displayed directly as numeric data.
VT Ratio (VT Scaling)
Set the VT ratio when applying the secondary output of a VT to the voltage input terminal. Then, set the voltage
range according to the maximum VT output.
Selectable range: 0.0001 to 99999.9999
CT Ratio Preset (CT Preset)
• When using the CT sold separately
Select the CT ratio from the preset settings. Select a preset (CT name) from the following:
Preset
CT Ratio (CT Ratio)
Others
Set using the number setting box.
CT2000A
2000.0000
CT1000
1500.0000
CT200
1000.0000
CT60
600.0000
If you set this item, the scaling ON/OFF (Scaling) is set to ON.
• When using other sensors
Select Others. If you select Others, the scaling ON/OFF and CT ratio do not change.
CT Ratio (CT Scaling)
Set the CT ratio (or the conversion ratio of the current sensor that produces current) when applying the
secondary output of a CT or clamp-type current sensor that produces current to the current input terminal. Then,
set the current range according to the maximum CT or current sensor output.
Selectable range: 0.0001 to 99999.9999
3 Input Settings (Basic Measurement Conditions)
