LVD75D80

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Solid State Relays (SSR) have become increasingly widespread due to their smaller size, better reliability, higher efficiency, and noiseless operation when compared to conventional relays. The LVD75D80 is a type of solid state relay that is particularly well-suited for a variety of applications. This article will discuss the application fields and working principle of the LVD75D80.

The LVD75D80 is a 4A, 500VAC rated two-channel solid state relay that is primarily used in applications such as heating and cooling, lighting control, motor and fan control, and process control. It features a wide operating voltage range, from 5-60VDC, and can easily be interfaced with any microcontroller, including Raspberry Pi, Arduino, and Molectron. The LVD75D80 features a unique dual-channel design, which allows for two separate channels to be operated simultaneously, allowing the user to control two separate components with one relay. Additionally, the LVD75D80 features an environmental protection rating of IP20, meaning that it is suitable for both indoor and outdoor installation.

The LVD75D80 uses a triac and two zero-cross detectors to provide reliable switching. In operation, the switch is built up by the zero-cross detector, then triggered by a gate signal. The gate signal is typically generated by a microcontroller or other switching circuit. As the switch reaches a predetermined current level, the triac is activated and it begins to switch on and off to modulate the drive. The LVD75D80 also features an overvoltage protection circuit that prevents the relay from switching on and off when an overvoltage condition occurs.

Additionally, the LVD75D80 features a thermal protection circuit that prevents the relay from becoming overloaded. This thermal protection circuit is designed to detect when the temperature of the triac begins to exceed its maximum rating. When the thermal protection circuit is activated, the triac is shut down and the relay is reset to its off position, eliminating any danger of an overload. Furthermore, the LVD75D80 incorporates a status indication LED which allows the user to quickly check the relay’s status.

In summary, the LVD75D80 is a two-channel, 4A, 500VAC rated solid state relay that is well-suited for a variety of heating and cooling, lighting control, motor and fan control, and process control applications. The LVD75D80 features a wide operating voltage range, an environmental protection rating of IP20, a triac and two zero-cross detector circuit, thermal protection circuit, and a status indication LED.

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