EP 1763049 B1 20160824 - Vacuum switchgear
Title (en)
Vacuum switchgear
Title (de)
Vakuumschaltanlage
Title (fr)
Installation de commutation à vide
Publication
Application
Priority
JP 2005264573 A 20050913
Abstract (en)
[origin: EP1763049A1] The vacuum switchgear is composed of a metallic container (12) at a floating potential, two insulating bushings, and a pair of electrodes. A measuring terminal (50) for vacuum pressure diagnosis is installed opposite the metallic container (12), and the metallic container (12) and measuring terminal (50) are molded by an insulator (20) such as epoxy, and conductive paint (21) grounded is installed on the outer peripheral part of the insulator (20). The ground capacity of the metallic container (12) is increased by the conductive paint (21) grounded, so that the potential of the metallic container (12) during operation approaches the ground potential. When electricity is discharged between the main circuit and the metallic container when the vacuum pressure is deteriorated, the potential of the metallic container becomes equal to the system potential, so that by a potential rise at the system frequency generated in the metallic container (12), deterioration of the vacuum pressure can be detected. Thereby, a signal processing circuit of a vacuum pressure diagnostic device for a vacuum switchgear is simplified and the cost of the vacuum switchgear is reduced.
IPC 8 full level
H01H 33/668 (2006.01)
CPC (source: EP)
H01H 33/668 (2013.01)
Citation (examination)
- EP 1041593 A2 20001004 - MITSUBISHI ELECTRIC CORP [JP]
- JP 2005108766 A 20050421 - NISSIN ELECTRIC CO LTD
- EP 0079181 A1 19830518 - MEIDENSHA ELECTRIC MFG CO LTD [JP]
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 1763049 A1 20070314; EP 1763049 B1 20160824; CN 1933078 A 20070321; CN 1933078 B 20100915; JP 2007080594 A 20070329; JP 4169024 B2 20081022; SG 131045 A1 20070426; TW 200717563 A 20070501; TW I313019 B 20090801
DOCDB simple family (application)
EP 06018899 A 20060908; CN 200610151482 A 20060912; JP 2005264573 A 20050913; SG 2006061436 A 20060906; TW 95131415 A 20060825