U
SING
V
OLTAGE AND
C
URRENT
T
RANSDUCERS
Power Analyzer User Manual
© Voltech 2010
Page
20
3. U
SING
V
OLTAGE AND
C
URRENT
T
RANSDUCERS
3.1.
I
NPUT
O
VERVIEW
Voltage
Voltages of up to 600V rms may be connected directly to the black and yellow 4mm
VHI and VLO safety sockets at the front of the
Current
Currents of up to 20A rms may be connected directly to the black and yellow 4mm AHI
and ALO safety sockets at the front of the
External Current Inputs
The external current inputs accept a voltage of up to 1V rms that is proportional to the
current being measured. This input allows a very wide range of external current
transducers to be connected, from low mA current shunts to MA current transformers.
For each type of transducer, the may be scaled to read the correct current.
See the INPUTS menu.
The choice of current transducer will depend on:
The current being measured, including peaks and transients.
The accuracy required.
The bandwidth required: Unless the waveforms are purely sinusoidal, a bandwidth
in excess of the fundamental frequency will be required.
Whether there is DC current present.
Convenience of connection
– E.g. using a clamp-on current transformer, with jaws
that open, for quick connection in a fixed wiring loom.
The effect of the transducer on the circuit.
