Gas insulated surge arrester and a gas insulated surge arrester monitoring system
AssigneeHitachi Energy Ltd
InventorJames Taylor
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Abstract
A gas insulated surge arrester is disclosed, including a metal clad housing within which a block stack is arranged. The block stack includes at least one metal-oxide resistor column and the gas insulated surge arrester is characterized by a capacitive element arranged to obtain an electric field measurement of the gas insulated surge arrester; and by a bushing arranged through the metal clad housing and arranged to the provide a capacitive third-order harmonic current measurement to an input of a surge arrester monitoring device. A monitoring system is also provided, including a gas insulated surge arrester connected to a surge arrester monitoring device.
Claims18
A gas insulated surge arrester comprising a metal clad housing within which a block stack is arranged, the block stack comprising at least one metal-oxide resistor column, the gas insulated surge arrester characterized by:
- a capacitive element arranged to obtain an electric field measurement of the gas insulated surge arrester, wherein the capacitive element is arranged to extract a capacitive third-order harmonic component in a leakage current of the surge arrester, and
- a bushing arranged through the metal clad housing and arranged to provide a capacitive third-order harmonic current measurement to an input of a surge arrester monitoring device.
A gas insulated surge arrester comprising a metal clad housing within which a block stack is arranged, the block stack comprising at least one metal-oxide resistor column, the gas insulated surge arrester further comprising:
- a capacitive element arranged to obtain an electric field measurement of the gas insulated surge arrester, wherein the capacitive element is arranged to extract a capacitive third-order harmonic component in a leakage current of the surge arrester,
- a bushing arranged through the metal clad housing and arranged to provide a capacitive third-order harmonic current measurement to an input of a surge arrester monitoring device.
Dependencies are inferred from the claim text.