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Tips for selecting a good Rogowski coils

2015-03-20 14:18:29

Rogowski coil (also called current measurement coil, the differential current sensor) is a new current transformer. It is of wide current range, high accuracy, stability, wide bandwidth, and at the same time of small size, light weight and safety etc. It can be used in measurement and Relay Protection and Rogowski coil plays an important role in more and more occasions. Recently various manufacturers are producing Rogowski coil, some of them are not qualified. So how to select a good Rogowski coil? Here’s some tips:

♦ Amplitude linearity
♦ Phase error
♦ Output noise
♦ Busbar position sensitivity
♦ Coil deformation sensitivity
♦ External field influence sensitivity
♦ Bandwidth 
♦ Temperature drift
♦ Insulativity
♦ ageing resistance


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