Campbell Scientific CS11-L Current Transformer - Manual (Page 29)

Appendix A. Theory of Operation
A.1 Typical Electrical Circuit
An example of a typical electrical circuit is a generator that provides energy in
the form of a 60 Hz sine wave. The energy is carried from the point of
generation to the point of consumption via two wires. The generator creates an
electrical load that lights up the light bulb (see FIGURE A-1).
FIGURE A-1. Generator schematic
To determine the consumption (amps) of the load, a way is needed to measure
what is passing through the wires.
A sensor is added to the circuit to measure the amperage going through the
circuit (see FIGURE A-2 through FIGURE A-4). This sensor is called a CT or
Current Transformer. The CS11-L is a current transformer.
CR1000
Datalogger
mV burst
Then
Calculate RMS
FIGURE A-2. Schematic of generator with current transformer
A-1