Lightning arrester with isolating switch

Abstract

The invention discloses a lightning arrester with an isolating switch. The lightning arrester comprises a zinc oxide resistor disc, an insulating sealing jacket, an upper terminal electrode and a lower terminal electrode, the bottom surface of the upper terminal electrode is provided with a conductive groove and an insulating groove which extend towards a first direction and are adjacent to each other; an isolating switch device is arranged between the zinc oxide resistor disc and the upper terminal electrode; the isolating switch device comprises a sliding base fixed on the pressure spring and a sliding table arranged in the sliding base; the top surface of the sliding table is provided with a protruding connector which extends in the first direction and can be matched with the conductive groove and the insulating groove. The two ends, extending in the second direction perpendicular to the first direction, of the sliding table are provided with a first end magnet and a second end magnet correspondingly. A rotatable switch sleeve is arranged on the outer side of the upper part of the insulating sealing jacket and corresponds to the isolating switch device; a first rotating magnet pair and a second rotating magnet pair corresponding to the sliding table are arranged on the inner side of the switch sleeve in the first direction and the second direction respectively.

Description

technical field [0001] The invention relates to a lightning arrester, in particular to a lightning arrester with an isolating switch. Background technique [0002] Surge arresters are also called overvoltage protectors or overvoltage limiters. The arrester is generally connected between the power grid cable and the earth, and connected in parallel with the protected equipment. The arrester can effectively protect the equipment. Once an abnormal voltage occurs, the arrester will act to protect it. When the equipment is running under the normal working voltage, the arrester will not work, and it will be regarded as an open circuit to the ground. Once a high voltage appears and endangers the insulation of the protected equipment, the arrester will act immediately, Will The impulse current is directed to the ground, thereby limiting the magnitude of the overvoltage and protecting the equipment. When the overvoltage disappears, the arrester quickly returns to its original sta...

AI Technical Summary

Problems solved by technology

When an overvoltage occurs, a large current flows through the arrester, but the voltage is indeed limited within a certain range, close to a short circuit

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