Using Rogowski coils for transient current measurements

The Rogowski-coil method of measuring electric current has developed into a versatile measuring system with many applications throughout industry and in research. The technique possesses many features which offer an advantage over iron-cored current measuring devices and these are well illustrated by considering how it can be used for measuring transient currents. The authors describe the principle of operation of Rogowski coils and the practical aspects of using them and give several examples of their use in making transient measurements. The Rogowski coil is a conceptually simple device. Its theory of operation illustrates some basic principles of electromagnetism applied in a practical device. The coil itself provides a demonstration of Ampere´s Law which is described by the authors