CR4120S-5

Frequency:	20Hz ~ 5kHz
Package / Case:	Module
Mounting Type:	DIN Rail, Panel
Polarization:	Bidirectional
Operating Temperature:	0°C ~ 60°C
Current - Supply (Max):	40mA
Response Time:	250ms
Voltage - Supply:	24V
Accuracy:	±0.5%
Linearity:	--
Series:	CR4100
Sensitivity:	--
Output:	Ratiometric, 4mA ~ 20mA
Number of Channels:	1
Current - Sensing:	5A
Sensor Type:	Transformer w/Conditioning
For Measuring:	AC
Part Status:	Active
Packaging:	Bulk

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Current Transducers: CR4120S-5 Application Field and Working Principle

The CR4120S-5 current transducer is designed for high performance and reliable measurement of ac/dc currents up to 50A. This versatile device is used in industrial automation, power analysis systems, and power quality applications. Thanks to its small size and low power consumption, the CR4120S-5 enables the direct integration of current sensors into modern compact, distributed control systems.

CR4120S-5 Device Structure

The CR4120S-5 is a packaged, modular device with a unique construction that combines a 4-terminal Rogowski coil current sensor with two compact measuring elements. The Rogowski coil is a non-inductive, air-cored current measuring element that wraps around the current conductor. It produces an axial signal voltage proportional to the current passing through the coil. The two measuring elements offer an internal reference and a calibration signal, making this device inherently accurately and highly stable over time.

Components

The most important components of the CR4120S-5 include a Rogowski coil current sensor, a calibration signal, and a voltage output unit. The Rogowski coil current sensor is a low-cost, surface-mounted component that produces a low-value axial signal voltage proportional to the current passing through the coil. Its dielectric encasement significantly reduces eddy current losses. The calibration signal is provided through a short-circuited terminal of the current sensor, and the voltage output unit is responsible for digitizing and conditioning the output signal.

Working Principle

The working principle of the CR4120S-5 is based on the concept of Rogowski coil current sensing. The Rogowski coil wraps around the current-carrying conductor and produces an axial signal voltage proportional to the current. This signal voltage is digitized by the voltage output unit and then converted into a standard analog output voltage signal. The analog output voltage is fed into a monitoring system or advanced calibration system for further analysis. It is also possible to connect the CR4120S-5 to any external device capable of converting the analog signal into digital data.

CR4120S-5 Application Fields

The CR4120S-5 current transducer is widely used in industrial automation, power analysis systems, and power quality applications. Thanks to its small size and low power consumption, the CR4120S-5 can easily be integrated into any compact distributed control system. In industrial applications, the CR4120S-5 is used to monitor and detect infrequent or large current variations that could otherwise lead to system failure. It is also used to analyze current waveforms in order to determine whether any load disturbances or harmonics are present. Additionally, the CR4120S-5 can be used to issue alarms in the event of over/under current conditions.In power analysis systems, the CR4120S-5 is used to measure the current passing through the load, as well as other significant parameters such as voltage, reactive power, and active power. It can also be used to determine the power factor and the energy consumption of the system.In power quality applications, the CR4120S-5 is used to detect and identify disturbances such as voltage sags, swells, and interruptions, as well as harmonic content. It can also be used to detect transients, abnormalities, and other electrical faults.

Advantages of CR4120S-5

In comparison with other current transducers, the CR4120S-5 offers several distinct advantages, chief among them:- Compact size: at just 10g in weight and 10x10x10mm in size, the CR4120S-5 is one of the most compact current transducers on the market. This makes it ideal for deployment in distributed control systems where space is at a premium.- Low power consumption: the CR4120S-5 requires a low power supply, and its power consumption is as low as 7W.- High accuracy: thanks to its internal calibration signal and internal reference, the CR4120S-5 is incredibly accurate. It is able to measure current fluctuations with a deviation of less than 1%.- High stability: the CR4120S-5 has a flat frequency response up to 10kHz, making it incredibly stable over time.- Wide operating range: the CR4120S-5 is able to measure currents up to 50A.

Conclusion

The CR4120S-5 current transducer is a state-of-the-art device designed for high performance and reliable measurement of ac/dc currents up to 50A. It is an ideal device for industrial automation, power analysis systems, and power quality applications thanks to its compact size, low power consumption, and unrivaled accuracy and stability. By providing an internal reference and an integrated calibration signal, the CR4120S-5 ensures that the measurements it obtains are highly reliable and accurate.

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