Failure determining apparatus of gas-insulated electrical appliance

A failure determining apparatus of a gas-insulated electrical appliance determining a failure, having a metal container, a charged conductor housed in said metal container filled with an insulating gas, and a plurality of insulating spacers insulation-supporting said charged conductor from said metal container and partitioning the interior of said metal container into gas sections, comprising:

• a gas pressure detector which detects the gas pressure of said gas section;
• a first failure determining circuit which determines an accident occurring gas section when an output of the gas pressure detector is over a first threshold value;
• a decomposed gas detector which detects a decomposed gas of said gas section;
• a second failure determining circuit which determines an accident occurring gas section when an output of the decomposed gas detector is over a second threshold value;
• and
• an arithmetic control circuit which determines occurrence of a failure in said gas section of said metal container when a decomposed gas exceeding said second threshold value occurs within a gas section in which an increase in pressure of over said first threshold value occurs, on the basis of output of determination of said first and second failure determining circuits;
• wherein said detectors are arranged in a single gas piping system derived from said gas section.

A failure determining apparatus of a gas-insulated electrical appliance determining a failure, having a cylindrical metal container, a charged conductor housed in said metal container filled with an insulating gas, and a plurality of insulating spacers insulation-supporting said charged conductor from said metal container and partitioning the interior of said metal container into gas sections, comprising:

• a plurality of high-speed developing sensors which detect a high-speed phenomenon caused by a failure within said gas sections;
• a first failure determining circuit connected to said plurality of high-speed developing sensors which determines the presence of said failure from an output of said high-speed developing sensors;
• a plurality of low-speed developing sensors which detect a low-speed phenomenon caused by said failure within said gas sections;
• a second failure determining circuit connected to said plurality of low-speed developing sensors which determines the presence of said failure from an output of said low-speed developing sensors;
• and
• an arithmetic control circuit connected to said first failure determining circuit and said second failure determining circuit that identifies which one of said gas sections of said metal container in which said failure occurs from an output of said first and second failure determining circuits.

A failure determining apparatus of a gas-insulated electrical appliance determining a failure, having a cylindrical metal container, a charged conductor housed in said metal container filled with an insulating gas, and a plurality of insulating spacers insulation-supporting said charged conductor from said metal container and partitioning the interior of said metal container into gas sections, comprising:

• a high-speed developing sensor means for detecting a high-speed phenomenon caused by a failure within said gas sections;
• a first failure determining circuit means for determining the presence of said failure from an output of said high-speed developing sensor;
• a low-speed developing sensor means for detecting a low-speed phenomenon caused by said failure within said gas sections;
• a second failure determining circuit means for determining the presence of said failure from an output of said low-speed developing sensor;
• and
• an arithmetic control circuit means for identifying a failure gas section of said metal container where said failure occurs from an output of said first failure determining circuit means and said second failure determining circuit means.