T049481

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A Gas Discharge Tube Arrester (GDT) is a device used to protect electrical equipment from the effects of lightning-induced overvoltages. In this article, we’ll discuss the application field and working principle of the T049481 GDT.

GDTs are commonly used in many situations, such as in data centers, power plant substations, and communications facilities. GDTs provide essential surge protection for these areas, and are an important component in the safety of sensitive equipment. A GDT will limit the voltage that a piece of equipment receives, and in some cases, may even completely block a surge.

The T049481 GDT is a small, lightweight device that is easily installed. It is designed for use in 120-volt AC circumstances. This particular arrester has a low threshold voltage, meaning that it is capable of protecting against even the smallest of overvoltages. Its maximum discharge current is 4A.

The basic principle behind GDTs is that when an overvoltage is present, it passes through the device and is discharged to the ground, thereby preventing it from reaching the sensitive equipment. The GDT contains a gas-filled tube, which is sealed from the outside. When a surge enters the device, the electron flow through the gas causes a breakdown – known as an arc – which in turn releases a triggered spark. This spark creates a path to the ground, through which the overvoltage is safely discharged.

GDTs are particularly useful in outdoor applications, as they have a self-resetting function. This means that once the overvoltage has been discharged, the GDT will ‘trip’ and reset itself, allowing it to be used again in the future. This is hugely beneficial, as it eliminates the need to manually reset the device, meaning less downtime and less maintenance.

The T04948 GDT has been specially designed to provide reliable protection in outdoor applications. It is engineered to remain operational even in extreme weather conditions, and is capable of withstanding temperatures ranging from –40°C to +85°C.

GDTs can also be used indoors, but their application is wider in outdoor settings. In both cases, they require a dedicated, properly rated grounding strap. This strap is also necessary for GDTs to function correctly, as it acts as a return path for the electrostatic discharge.

In conclusion, the T049481 GDT is a small, lightweight device designed for use in 120-volt AC circumstances. It is capable of providing reliable surge protection indoors and outdoors, and features a self-resetting function in outdoor applications. It requires a dedicated, properly rated grounding strap in order to work safely and efficiently.

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