What are three advantages of a rogowski coil current transformer?

No Saturation at High Currents

Current transformers with a metal core reach a saturation point when the primary current is high enough that the sensor can no longer provide a secondary current that is proportionally accurate to the primary current. This can happen when a CT is used on a service outside its specified range and, besides potentially causing damage to the CT, it will also provide inaccurate amperage readings. Not only do Rogowski coil sensors accurately operate on high amperage loads with ease, but their air core never saturates.

Lightweight and Flexible

One reason a Rogowski coil may be selected over a rigid-body current transformer is their lightweight, flexible design. Not only does this make them easy to install in tight electrical panels or around large conductors, but it can significantly reduce the installation time, saving money.

Superior Frequency Response

When compared to traditional CTs, a Rogowski coil’s low inductance means they have a high frequency response and can adapt to rapidly changing electrical loads within a fraction of a second. Overall, they offer superior performance in power monitoring applications with high, fast-changing current.