The difference between rogowski coil and current transformer

 Product Overview:

    Current transformer, also known as CT, is widely used in power systems as electromagnetic current transformer (hereinafter referred to as current transformer). It is an instrument that converts a large primary current into a small secondary current based on the principle of electromagnetic induction for measurement, consisting of a closed iron core and winding.

    Flexible current probe, also known as rogowski coil. It is an AC current sensor composed of a circular coil uniformly wound on a non-ferromagnetic material and an integrator. The output signal is the differential of current over time, which can be directly connected to the measured conductor to measure AC current.

 Common ground and differences

1. Common ground:

① Wide measurement range, high safety factor, and can measure AC current.

② Easy to install and customizable.

③ Widely used in research and development laboratories, universities, power grid monitoring, industrial testing, production lines, etc.

2. Difference:

① The flexible rogowski coil can only test AC current or pulsed DC current.

② The flexible rogowski coil is more convenient and flexible to operate, and adopts a plug-in type.

③ Flexible rogowski coil are widely used in the fields of high-frequency current and continuous high current measurement.

④ The flexible rogowski coil will not burn out and will not carry high voltage.

⑤ Current transformers have higher accuracy and strong anti-interference ability.

Selection

1. Continuous DC current measurement, select a current transformer.

2. If there are high-frequency AC signals (hundreds of kHz) or pulsed DC signals (microsecond level), it is better to choose a flexible rogowski coil.

3. If there are special requirements for the testing environment (such as narrow spaces) that cannot be met by the , flexible rogowski coil can be considered.