Litningarstöðu

Litningarstöðu, also known as lightning arresters or surge arresters, are protective devices used in electrical systems to safeguard equipment from the damaging effects of lightning strikes and other transient over-voltages. These devices are designed to divert excess electrical current away from sensitive components, thereby preventing damage and ensuring the continuity of power supply.

The primary function of a litningarstöðu is to provide a low-impedance path for transient over-voltages, such as those caused by lightning, to be safely discharged to the ground. This is achieved through the use of a gas discharge tube or other non-linear resistor that breaks down at a specific voltage level, allowing the excess current to flow through it rather than through the protected equipment.

Litningarstöðu are typically installed at the entrance of electrical systems, such as power transformers, switchgear, and distribution panels. They are available in various types, including rod gap arresters, valve arresters, and metal-oxide varistor (MOV) arresters, each with its own characteristics and applications.

The selection of a litningarstöðu depends on factors such as the system voltage level, the expected magnitude of over-voltages, and the specific requirements of the protected equipment. Regular maintenance and testing are essential to ensure the proper functioning of litningarstöðu and to identify any potential issues before they can cause damage to the electrical system.