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High-voltage gas-insulated switchgear hitachi and abb concentration electronic weighing device

US6333715B1 - Partial discharge detector of gas-insulated ... a circular signal receiving antenna unit ( 4 ) constituted by combining two pieces of semicircular conductive plates on a plane in a metallic vessel ( 3 ) for the gas insulated apparatus, the electromagnetic waves due to the partial discharge can be detected with a high sensitivity for a broad frequency band. The detected signals are measured by a measuring unit ( 10 ) via a hermetical ...

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