How To Distinguish between Coil Integrator Acquisition Device And Rogowski Coil

The coil, integrator, and acquisition device can be distinguished in terms of function, appearance, connection method, etc. The following is a specific introduction:

function

Rogowski Coil: Based on the principle of electromagnetic induction, it is used to measure AC current, pulse current or high-frequency current, and outputs a voltage signal proportional to the rate of change of the measured current.

Integrator: Integrating the voltage signal output by the Roche coil, converting it into a voltage or current signal proportional to the measured current for subsequent measurement and processing.

Acquisition device: used to collect the signal output by the integrator, and display, store, and analyze it. For example, an oscilloscope can display the signal waveform, and a data recorder can record the signal data for subsequent analysis and processing.

appearance

Rogowski Coil: It is usually a circular coil composed of wires uniformly wound on non-magnetic materials. There are two types: flexible and rigid. Flexible Rogowski Coil can be bent and are suitable for various installation restrictions, while rigid Rogowski Coil are more sturdy and suitable for fixed position measurements.

Integrator: generally an independent electronic device, similar in appearance to a small instrument or module, with a housing package and input/output interfaces, power interfaces, etc. Some integrators may be installed on DIN rails for ease of installation in the control cabinet.

Acquisition devices: There are various forms, such as oscilloscopes with display screens and various operation buttons, data recorders that may be rectangular boxes with data interfaces and power switches, and industrial control computers that are similar to ordinary computer hosts with peripheral devices such as displays.

connection method

Rogowski Coil: It has two output terminals and is connected to the input interface of the integrator through a dedicated shielded wire. When connecting, pay attention to the positive and negative polarity.

Integrator: The input interface is connected to the output terminal of the Rogowski Coil, and the output interface is connected to the input interface of the acquisition device. The output forms include AC/DC voltage signals, AC/DC current signals, digital signals, etc. The appropriate connection method can be selected according to the requirements of the acquisition device.

Acquisition device: It has multiple input interfaces, such as BNC interface, terminal interface, etc., used to receive the signal output by the integrator. It may also have USB interface, Ethernet interface, etc., used for data transmission and communication with external devices.

Signal characteristics

Rogowski Coil: The output signal is a weak voltage signal, commonly at 100mV/kA, and is in a 90 ° phase relationship with the measured current signal.

Integrator: The output signal is proportional to the amplitude of the measured current signal, and the phase is corrected to produce a voltage or current signal that is in phase with the measured current.

Acquisition device: It displays or records the signal corresponding to the measured current processed by the integrator, and can display different parameters such as effective value, peak value, waveform, etc. according to the settings of the acquisition device.