CPF480D25

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Solid state relays are a type of electric switch that use a solid-stateelectronic component instead of mechanical components or electromechanicalcomponents to actuate. They are generally composed of a semiconductor switchingdevice, an optically isolated amplifier, and an output device. The CPF480D25is an example of such a device, with its particular application field andworking principle delineated below.

Applications

The CPF480D25 is a single-phase zero crossing type solid state relay and ismost typically used in multifunction controllers, power electronic equipmentcontrol systems, and other DC power supply and control systems. Additionally, itcan be used as a programmable controller switch relay, air-condition engineeringcontrol, and frequency conversion control.

Working Principle

The CPF480D25 operates by controlling the load circuit by the operation of thetriac through the phototriac optical isolation layer. The phototriac opticalisolation layer also helps prevent the various electrical interference. When thetriac is opened, the output-end load will not operate. When the triac isswitched on, the output end load will be energized. The CPF480D25 works byusing a zero-crossing detection circuit inside. A zero-crossing detecting sensiorreceives high-voltage AC signals supplied through the power supply and detectsthe AC signals on both sides of the AC signal. When the voltage exceeds thetrigger value, the cooperating circuit sends out a signal to the control circuit,which in turn triggers the triac. After that, the load is connected to the ACpower, allowing it to work normally.

Conclusion

The CPF480D25 is an example of a single-phase zero crossing type solid staterelay with multiple possible applications. It utilises a zero-crossing detectioncircuit inside to control the load circuit by the operation of the triac throughthe phototriac optical isolation layer, and helps to prevent various electricalinterferences. As such, the CPF480D25 is a reliable and effective componentfor many electric control systems, and is commonly used in multifunctioncontrollers, power electronic equipment control systems, DC power supply andcontrol systems, programmable controller switch relay, air-condition engineeringcontrol, and frequency conversion control.

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