LWRS440A

Series:	*
Part Status:	Obsolete

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The LWRS440A is a type of current/voltage monitor relay output device. It is a very versatile device that can be used for a variety of applications. This article outlines the various applications and the working principle of this device.ApplicationThe LWRS440A is a monitor and relay output device designed for accurate current/voltage measurements. It is particularly suitable for use in monitoring ambient and chilled water systems, power plants, renewable energy installations, and other high-voltage applications.It is designed for straightforward installation. It can be connected to a standard three-phase conduit cable, and the current/voltage measurements can be taken directly from the power lines.The device has a high resolution LCD display, which allows users to precisely monitor voltage/current measurements. It also has a relay output that can be set to trigger an alarm when a limit is exceeded. This can provide effective protection against potential hazards.In addition to monitoring existing systems, the LWRS440A can be used to develop new monitoring systems. The design is modular, which provides flexibility and allows for the addition of additional monitoring capabilities.Working PrincipleThe LWRS440A operates on a principle known as “sample and hold”. The device samples the current/voltage of the power lines and holds the value. This value is then displayed on the LCD display. The device also provides a comparison between the sampled value and a pre-set threshold value. When the value exceeds the threshold, the relay output is triggered.The LWRS440A also has a built-in digital-to-analog converter. This provides a more accurate reading of the voltage/current. The device can be set to perform a comparison every second, minute, or hour. This ensures that the voltage/current measurements are updated regularly, allowing it to provide accurate readings.ConclusionThe LWRS440A is a versatile current/voltage monitor and relay output device. It is designed for accurate current/voltage measurements and is particularly suited for monitoring ambient and chilled water systems, power plants, renewable energy installations, and other high-voltage applications. The device operates on a sample and hold principle and provides a digital-to-analog converter for greater accuracy. The device is modular, allowing users to customize their systems with additional monitoring capabilities.

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