S9.4 is a waterproof Rogowski coil integrator combine with power meter or PLC ,in a plastic enclosure,powered directly from the mains.
S9 can be combined with any model and size of Y-FCT or NRC Rogowski coils
The available values are:4-20mA DC
S9 and Rogowski coil is a very flexible system,suitable for high power load analysis,impulsive current monitoring,DC ripple measurement,etc.
Due to its specific,flexible Rogowski coil Rogowski coil is anextremely comfortable solution for current measurement and can be used in a number of cases where traditional current transdecer is not the adequate solution.
The Roche coil, also known as the current measurement coil, the differential Roche coil, is a ring coil evenly wound around a non-ferromagnetic material. The output signal is a current-to-time differential, a weak voltage signal (commonly found in 100mV/kA), which is in a 90-degree phase relationship with the current signal under test and proportional to the frequency of the current under test. The output current can be truly restored through a circuit that integralizes the output voltage signal. Compared to traditional transformers with iron cores, Roche coils are characterized by real-time current measurement, fast response times, unsaturated, and virtually no phase errors. Current tests for the milliamp-to-megaamp range.
The output signal of the Roche coil is a differential of time and is in a 90-degree phase relationship with the current signal under test. Also, the Roche coil output signal is not weak voltage (commonly found at 100mV/kA). The integrator has the effect of amplifying and shifting phase by 90 degrees to compensate. The frequency of the Roche coil output and the current under test is proportional, and after the action of the integrator, the output signal is only proportional to the increase of the current signal under test, and by measuring the signal, it can more directly reflect the one-time current. However, the integrator is not an ideal integration function, the use of the process should pay attention to the bandwidth range, as well as power consumption and other parameters.
The output form of the integrator is an AC DC voltage signal. AC DC current signals, digital signals, etc.
Rogowski coil output is weak voltage mV signal,S9 has ability to amplify and convert it to standard signal which could same output level over the frequencies.
Rogowski coil output is proportional to the frequency of the measured current, the signal equalization ensure a linear response on a wide frequency range. S9 allows to use coils on different electrical network frequencies, keeping the same output level over the frequencies.
An integrator is essential to equalize and shift by 90° the output signal from the Rogowski coils. It consists of an active electronic circuit with negligible offset and a good linearity.
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