GTCA28-141M-R20

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Gas Discharge Tubes (GDTs) are an important protective device, widely used in a variety of electrical equipment and system. The specific example of such device is the GTCA28-141M-R20 Arrestor. This arrester is specifically designed to provide protection for low and medium voltage systems, mainly when exposed to external lighting and momentary overvoltage.

Generally speaking, GTCA28-141M-R20 arrester is composed of two elements: the upstream element and the downstream element. The upstream element is the glass metal tube, which is responsible for the initiation of the overvoltage protection mechanism of the arrestor. In the upstream element, there are two electrodes as well as a certain amount of gas. When an exceeding overvoltage is experienced, the electric field between the two electrodes becomes higher than the breakdown voltage of the gas, which causes the discharge process to start. At this point, the GDTs initiate protection by flowing current from upstream to downstream. The downstream element is the spark gap, which is responsible for the ultimate clamping of voltage.

In terms of protection abilities, GTCA28-141M-R20 arrestor can provide protection against a wide range of overvoltage transients, ranging from 8 kV to 32 kV, with a hold-off voltage of 28 kV. It also has a peak current capacity of 141 kA and a discharge time of less than 10ms. Moreover, its flexibility provides the ability to meet stringent application requirements.

GTCA28-141M-R20 arrestors are mainly used for the protection of secondary distribution systems and residential occupancies. The combination of high energy containment capacity and fast disintegration feature make GTCA28-141M-R20 suitable for the protection of equipment and circuits from lightning or other transient overvoltage. Furthermore, the metal oxide semiconductor gas tubes which are embedded inside the upstream portion of the arrester, makes it highly resistant to longer duration overvoltage compared to other conventional arresters.

In addition to its use for electrical protection, GTCA28-141M-R20 arrestors can also be used in thermal protection applications, mainly for protecting costly and expensive equipment from dangerous temperature increases. It works by limiting the current limiting inrush current, and helps to reduce the electrical losses generated during the operation, as well as extend the life of the protected equipment.

In conclusion, GTCA28-141M-R20 arrester is a reliable, flexible, and cost-effective device used to protect against a wide range of overvoltage transients. It is widely used for the protection of secondary distribution systems and residential occupancies, and can also be used in thermal protection applications. With its high energy containment capacity and fast disintegration feature, it is the ideal choice for electrical and thermal protection in various applications.

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