Split-core
current transformers (CTs), among other things, are used to conduct
electrical load surveys. Offices and factories periodically ask for a
thorough assessment of their energy consumption and ways to get more
for less. Such an assessment answers the question: "How much
energy does it take the load to convert electricity to light, heat,
or motion?"
Basically,
the load refers to everyday appliances and fixtures like light bulbs,
heaters, and air conditioners. There are as many types of electrical
loads as stars, but that's for another time. By deriving and
reviewing current load data, analysts can predict energy consumption
within the coming years, prompting managers to take decisive action.
Touching
a live wire is, to say the least, ill-advised; but thanks to
split-core
CTs, assessors don't have to. These devices can sense the
magnetic field generated by the supply line connected to the load.
Power lines, in general, emit electromagnetic fields due to the
movement of charged particles. This is the buzz you normally hear in
substations and steel pylons.
Split-core
CTs don't need to physically touch a wire to get a reading, thanks to
the magnetic field they produce. They can simply clamp around it and
still get accurate data.
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