Advantages
This type of coil has advantages over other types of current transformers.
- It is not a closed loop, because the second terminal is passed back through the center of the toroid core (commonly a plastic or rubber tube) and connected along the first terminal. This allows the coil to be open-ended and flexible, allowing it to be wrapped around a live conductor without disturbing it.
- It has an air core rather than an iron core, it has a low inductance and can respond to fast-changing currents.
- Because it has no iron core to saturate, it is highly linear even when subjected to large currents, such as those used in electric power transmission, welding, or pulsed power applications.
- A correctly formed Rogowski coil, with equally spaced windings, is largely immune to electromagnetic interference.
Read more about this topic: Rogowski Coil
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