AQC1A2-ZT24VDC-R

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Solid state relays are an alternative to mechanical switching relays as they offer a faster response time, silent operation and improved reliability. They are often used in applications where high frequent switching is needed or operation in hazardous areas. The AQC1A2-ZT24VDC-R is a solid state relay that can be used in a variety of applications. In this article, the application fields and working principle of this specific model will be discussed.

Application Fields

The AQC1A2-ZT24VDC-R is a zero crossing solid state relay with a load voltage of 24VDC. This type of relay is a type of relay that uses semiconductors such as transistors, thyristors, or SCRs to switch the load current on and off. The AQC1A2-ZT24VDC-R is designed for applications that require switching of low voltage, highly inductive, or hazardous AC loads. Examples of typical applications include switching of lamps, motors, heaters and other devices that require protection from voltage fluctuations and overloads.

Aside from its ability to switch AC loads, the AQC1A2-ZT24VDC-R is also suitable for operation in hazardous areas. This means that it can be used in applications where flammable materials may be present such as in chemical plants. It is UL approved and certified for use in Hazardous Locations (Class I, Division 2) and can be used in temperatures as low as -40°C and as high as +85°C.

Working Principle

The working principle of the AQC1A2-ZT24VDC-R is fairly straightforward. This type of solid state relay first switches off the load when it detects a zero crossing of the AC voltage waveform. This is done by using a reverse-biased diode and a trigger circuit gain circuit. This prevents the solid state relay from becoming damaged by any overvoltage peak currents, and it ensures that the relay switches off before a restarting current can be applied to the load.

Once the AC voltage reaches zero, the AQC1A2-ZT24VDC-R will then switch open the normally closed contacts, which allows the load to be energized and the current to flow through the load. In other words, it acts like a mechanical contactor. This switching operation can occur at frequencies up to 50Hz.

The AQC1A2-ZT24VDC-R can also operate as a “make before break” contactor, which is ideal for loads that require an uninterrupted power supply. This is achieved by using the internal overlap control circuit, which delays the opening of the normally closed contacts when switching between two states. This allows the contacts to overlap slightly in order to continue the current flow until the next zero voltage crossing.

Conclusion

The AQC1A2-ZT24VDC-R is a zero crossing solid state relay that is designed for the switching of hazardous AC loads. It is able to switch loads safely as it switches off when a zero crossing of the AC voltage waveform is detected. The AQC1A2-ZT24VDC-R is suitable for use in dangerous environments and can operate at frequencies up to 50Hz. It can also act as a “make before break” contactor, allowing an uninterrupted power supply to the load. This makes it a perfect solution for applications such as heating, lighting, motor control and other hazardous AC load switching.

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