Search International and National Patent Collections

1. (WO2018086854) CAPACITORS

Pub. No.:    WO/2018/086854    International Application No.:    PCT/EP2017/077053
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed Oct 25 01:59:59 CEST 2017
IPC: H01G 2/08
H01G 4/32
H01G 2/14
H01G 4/015
H01G 4/18
Applicants: GENERAL ELECTRIC TECHNOLOGY GMBH
Inventors: BURNETT, Alistair
SPIBEY, Neil
Title: CAPACITORS
Abstract:
This application describes methods and apparatus for the safety and protection of capacitor units suitable for medium and high voltage applications, for instance within switching modules (400) of a voltage source converter as may be used for HVDC or FACTs. The capacitor unit (300) has a housing (201) within which is a capacitor comprising a plastic film dielectric material, for instance a winding (100) of first and second plastic films (101, 102) with metal coatings(103, 104). A pressure sensor (302) is configured to detect if the pressure in the housing exceeds a first pressure level and a pressure relief valve (304) is configured to vent gas from the housing if the pressure in the housing exceeds a second pressure level which is higher than the first pressure level.