Rogowski coil technology provides solutions for today's and tomorrow's current measuring problems.
Rocoil Limited UK is a small company that specialises in the development, design and manufacture of current transducers for use in situations that have difficult and exacting requirements.
The transducers use air-cored coils to detect the current and integrators to achieve the sensitivity and frequency response required. The coils are commonly referred to as Rogowski coils.
The properties of the Rogowski coils and integrators can be utilised to achieve solutions to a wide range of current measurement problems. These properties are:
Flexibility, Weight and Size
Transducers from a few millimetres diameter to several metres have been produced to measure currents inside and around engineering structures. These can be made on flexible and rigid formers and because the formers are non magnetic they are light weight.
Current and Frequency Range
Currents from a few milliamps to mega amps can be measured covering a frequency range of a fraction of a hertz (transient dc offsets) to about 1MHz in some cases.
Accuracy and Linearity
Accuracies better than the best current transformers can be produced and because they are air-cored this accuracy is maintained over the entire working range. Low temperature coefficients can be achieved by matching the coils to the integrators. Also with careful design of the winding layout the pickup from external magnetic fields and nearby other currents can be controlled.
What we do
Our aim is to promote the use of Rogowski coils. We appreciate that this technology can be new, even to experienced electrical engineers, and we work closely with our customers to try to understand their specific current-measurement applications to provide the best solution. We have developed a wide range of products and techniques to cope with different current measurement situations and our detailed knowledge of the Rogowski coil means we can easily modify these for special requirements. All of our products are made to order and tailored for each of our customers’ needs, in a diverse number of industries. We have manufacturing capability from developing prototypes to large production runs.