2026-40-CF

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 (GDTs) are a device used to protect power equipment from damage caused by transient over-voltages. 2026-40-CF GDTs are high-current and low-voltage air gap discharge arresters used in many applications, including power systems, single-layer discharge arresters, and lightning arresters. GDTs do not require special maintenance and have an expected life of 10 to 20 years, depending on the application.

The 2026-40-CF GDT consists of two electrically isolated elements, the reference layer and the varistor. The first element, the reference layer, is a negative temperature coefficient (NTC) material that is connected to the arrester ground terminal. It provides the reference voltage to the second element, the varistor. The varistor is a high-energy metal oxide resistor that is connected to both the arrester hot terminal and the reference layer. It stops the flow of current above a certain level and ensures the effective transfer of energy from the incoming voltage to the reference capacity of the arrester.

The characteristic of the 2026-40-CF GDT is determined by its number of stages. It usually has three or four stages, each stage having a different NTC material and varistor combination. In addition, there is a surge-preventive diode connected between each varistor–NTC pair to prevent reverse current flow. The 2026-40-CF GDT also includes a grounding element, which is connected to the frame of the arrester and acts as the return path for the current.

The working principle of the 2026-40-CF GDT is based on its ability to reduce the magnitude and dissipate the energy of transient over-voltages. During normal conditions, the NTC material of the arrester has a low temperature coefficient and provides a high-impedance path for the current. When an over-voltage occurs, the NTC material begins to act as a resistor and limits the current. This process is called voltage limiting. The varistor acts as a surge absorber and absorbs the energy of the transient over-voltage. During the voltage limiting process, the NTC and varistor combination absorbs the majority of the transient energy, while the surge-preventive diode limits current flow.

GDTs, such as the 2026-40-CF, are used in many applications, ranging from residential and commercial power systems to protection of industrial level equipment. They are used to limit the amount of energy that can reach the sensitive electronic components of power systems to protect them from any transient over-voltages. The 2026-40-CF GDT is a reliable and cost-effective solution for providing long-term protection to power systems against damaging and hazardous over-voltages.

In conclusion, the 2026-40-CF GDT is an effective device for controlling over-voltage transients in power systems. It is capable of absorbing large amounts of energy while keeping the voltage within acceptable limits. The 2026-40-CF uses a combination of NTC and varistor elements in order to provide a high level of protection from over-voltage transients and is designed to last for 10 to 20 years depending on the application.

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