L18P040S12

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Current transducers are electronic devices that are responsible for transforming electrical currents into either electrical or optical signals. Among the variety of current transducers, L18P040S12 stands out as a line and phase over voltage relay with its own set of characteristic features. With an on-board display and remote management, this unit offers a wide range of applications and can be used to monitor a variety of current measurements. In this article, we will be discussing the application fields and working principle of the L18P040S12.

Application fields

The L18P040S12 is suitable for use in a variety of applications, such as but not limited to protection of electrical installation, protection of electrical cables and lines, monitoring of single-phase and three-phase AC currents, and over/under voltage protection of electric motors. Additionally, it can be applied in the industrial sector as an auxiliary input device for systems working with current measurement.

This unit has an in-built display that allows for displaying real-time current measurements, as well as offering feedback about other operations, such as setting up the relay, data fetching, and system information. The L18P040S12 can also be managed remotely. It has an RS485 connector that facilitates connection to devices for remote control, data gathering, and system settings.

Working Principle

The L18P040S12 is based on the principle of a universal current transducer. It works by detecting an AC input current and then converting it into a voltage signal. This voltage signal is then processed by an electronic circuit to extract the desired parameters related to the current measurement. The extracted parameters are then displayed on the built-in display.

This unit can be programmed to detect over-voltage and under-voltage levels. It uses a comparator that compares the voltage of the measured line or phase with the predefined over-voltage and under-voltage thresholds. This comparison will then result in a relay trip, in case the measured voltage crosses the predefined thresholds.

The L18P040S12 can read the current in three-phase systems, single-phase systems, and in lines with a neutral connected to machines with up to 4A of current on the load. The extracted parameters are displayed either in numerical form or in a graphical form. This unit has a number of adjustable parameters, such as the circuit time delay for enabling users to modify the operational parameters as per their requirements.

Conclusion

The L18P040S12 is a versatile current transducer that can be used for a variety of applications. It works on the principle of a universal current transducer and is capable of detecting over-voltage and under-voltage levels and displaying real-time current measurements on its in-built display. Additionally, it can be managed remotely using an RS485 connector.

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