A GAS INSULATED SURGE ARRESTER AND A GAS INSULATED SURGE ARRESTER MONITORING SYSTEM

摘要

A gas insulated surge arrester (1a, 1b, 1c) is disclosed, comprising a metal clad housing (3) within which a block stack (4) is arranged. The block stack (4) comprises at least one metal-oxide resistor column (2) and the gas insulated surge arrester (1a, 1b, 1c) is characterized by a capacitive element (9a, 9b, 9c) arranged to obtain an electric field measurement of the gas insulated surge arrester (1a, 1b, 1c); and by a bushing (10a, 10b, 10c) arranged through the metal clad housing (3) and arranged to the provide a capacitive third-order harmonic current measurement to an input of a surge arrester monitoring device (7). A monitoring system (100) is also provided, comprising a gas insulated surge arrester (1a, 1b, 1c) connected to a surge arrester monitoring device (7).