Editing Rogowski coil (section)

==Disadvantages==
This type of coil also has some disadvantages over other types of [[current transformer]]s.
 
* The output of the coil must be passed through an integrator circuit to obtain the current waveform.  The integrator circuit requires power, typically 3 to 24Vdc, and many commercial sensors obtain this from batteries.<ref name=":4">Krzysztof Iniewski, ''Smart Sensors for Industrial Applications'', CRC Press, 2013, {{ISBN|1-466-56810-0}}, p. 346.
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* Traditional split-core current transformers do not require integrator circuits. The integrator is lossy, so the Rogowski coil does not have a response down to DC; neither does a conventional current transformer (see [[Néel effect]] coils for DC). However, they can measure very slow changing currents with frequency components down to 1&nbsp;Hz and less.<ref name=":2" />
* Constant DC current cannot be measured. The Rogowski coil samples the field, generating a voltage as the field changes.<ref>{{Cite web |date=July 28, 2023 |title=What is Rogowski Coils and How Does it Work? |url=https://aimdynamics.com/rogowski-coils |access-date=September 26, 2023 |website=aimdynamics}}</ref>