MAIN-CIRCUIT ABNROMALITY SECTION DETECTION APPARATUS OF HERMETICALLY SEALED SWITCHGEAR

Japanese Patent JP2745959

B2

PURPOSE: To obtain the main-circuit abnormality section detection apparatus, of a hermetically sealed switchgear, wherein an abnormality section can be detected at an early stage and with high accuracy without damaging the reliability of the insulation of a main circuit.
CONSTITUTION: An oscillated-wave input means 6 to which reference oscillated waves are input is arranged and installed at one end of a main circuit 4 in a hermetically sealed switchgear. Oscillated-wave detection means 8a, 8b, 8c which detect the oscillated waves propagated to the main circuit 4 are arranged at insulating spacers 3a, 3b and at the other end of the main circuit 4. An abnormality judgment means 9 constituted in the following manner is installed: the oscillated waves which have been detected by the oscillated-wave detection means 8a, 8b, 8c are compared respectively with the oscillated waves propagated to the main circuit 4 of the reference oscillated waves in the normal state of the hermetically sealed switch-gear; and whether an abnormality exists in the main circuit 4 or not is judged. An abnormality section judgment means 10 wherein a trouble section is judged by means of a preset logic on the basis of a result obtained by the abnormality section judgment means 9 is installed.

JPH058471	[Name of device] Disconnection detection indicator
WO/2014/204971	LONG LIFE, FAIL SAFE TRAFFIC LIGHT

Murayama Kozo
Hajime Ikuta

JP12286192A

April 28, 1998

April 17, 1992

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Takatake Manufacturing Co., Ltd.

G01R31/02; H02B13/065; H02G5/06; H02H5/00; (IPC1-7): G01R31/02; H02B13/065; H02G5/06; H02H5/00

JP63218873A
JP452571A

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