Vacuum Interrupter For 40.5kV TD-40.5/2500-31.5(163)

Vacuum interrupter, also known as the vacuum switch tube, is the core component of the medium-high voltage power switch.  It is mainly applied to the power transmission and distribution control system, and it is also applied to the distribution systems of metallurgy, mine, petroleum, chemical, railway, broadcasting, communication and industrial high frequency heating. Vacuum interrupter has the characteristics of energy saving, material saving, fire prevention, explosion-proof, small volume, long life, low maintenance cost, reliable operation and no pollution. The load switch is mainly used for the terminal users of the power grid.When the power frequency voltage is close to zero, and at the same time, due to the increase of contact opening distance, The plasma of the vacuum arc quickly diffuses around. After the arc current passes zero, the medium in the contact gap quickly changes from a conductor to an insulator, so the current is cut off. Due to the special structure of the contact, the contact gap will produce a longitudinal magnetic field during arcing. This magnetic field can make the arc evenly distributed on the contact surface, maintain a low arc voltage, and make the vacuum arc extinguishing chamber have a high recovery speed of post arc dielectric strength, resulting in small arc energy and small corrosion rate. In this way, the interrupting current capacity and service life of the vacuum interrupter are improved.