User Manual

Connecting signals
Figure 20: Current transformer connections
To connect a voltage transformer / transducer
The PA3000 can be used with a voltage transformer (VT) or other transducer to
extend its measuring range. Follow the manufacturer’s instructions for the safe
use and installation of the transducer.
The output of the transducer is connected to the normal VHI and VLO terminals.
Normally the positive or HI output of the transducer will be marked with the point
of an arrow or a + symbol. Connect this terminal to the VHI input of the PA3000.
Voltage scaling
A voltage transformer (VT) produces a voltage output, which is proportional to
the v oltage being measured.
To measure the correct voltage on the PA3000, use the scale function of the power
analyzer to scale, or multiply, the VT output current.
For example, when measuring with a 1000:1 VT a scale factor of 1000 must
be used.
Press
.
Select
Inputs and press .
Select
Scaling and pres s .
Select
Volts and press .
Use
to clear the entry.
Enter the new scale factor (1000).
Press
.
Press
to return to the m easurement display.
34 PA3000 Power Analyzer User Manual