PMT3(310)35006

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Gas Discharge Tube Arresters (GDT) are components designed for protection against lightning strikes, power surges, short circuits, and other electrical disturbances that can cause damage to sensitive electrical and electronic equipment. The High Power Model PMT3(310)35006 is an example of an arrester that can offer protection up to 3500V.

GDTs are constructed using two electrodes: one inside a tube of insulation material, and the other situated outside the tube. When lightning, power surge, or short circuit occurs, voltage is generated, charging the two electrodes and creating an electric field. This field causes a current to flow through the gaseous medium between the two electrodes (often a combination of air and a special gas such as sulfur hexafluoride). This current ionizes the gas, creating a conducting path.

This arrester operates in a similar way to other gas discharge tubes but is higher powered, which is useful when the power line voltage is higher than other types of arresters can handle, for instance from a power substation. The PMT3(310)35006 can provide protection for a voltage up to 3500V AC, thus it is ideally suited for use in commercial or industrial premises that have more powerful electrical equipment and greater loads.

The arrester consists of an enclosure, hard ceramic insulators, metallic electrodes, a normally nonconductive filler material such as sulfur hexafluoride, and a thermal fuse element. The ceramic insulators are responsible for providing high insulation resistance and for the spark immunity of the arrester. The metallic electrodes act as the anode and cathode, allowing current flow between them when an ionized plasma is formed in the enclosed container. The thermal fuse element acts as a safety feature, preventing any sudden or extreme rise in the internal pressure of the arrester.

The overall configuration of a GDT arrester is simple yet effective. During normal operation, the two electrodes are electrically insulated from each other. However, when voltage reaches a certain “break-over voltage”, the electrodes of the arrester become conducting and form a brief conducting plasma. This results in a temporary “short circuit” between the two electrodes, which prevents further voltage increase in the system.

The effective working principle lies in the arrester’s ability to discharge the excess energy before it reaches a critical level. When the voltage and current reach a certain level, the switching action of the arrester turns on and a conducting plasma is created between the two electrodes. This forms a shunt path for the current flow, thus reducing the voltage and current levels. The arrester remains in this state until the accompanying power surge has dissipated and the voltage returns to acceptable levels.

The high power model PMT3(310)35006 is an excellent choice for any large scale establishments requiring maximum protection against lightning strikes, power surges, short circuits, and other high voltage disturbances. Featuring high insulation resistance, high-voltage circuit protection, and spark immunity, this arrester helps ensure the proper functioning of sensitive equipment and electronics during and after power disturbances. This robust arrester can provide reliable power protection for up to 3500V AC.

The specific data is subject to PDF, and the above content is for reference