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1. (WO2018130296) ARC CHUTE WITH SPLITTER PLATES INTERCONNECTED BY RESISTORS

Pub. No.:    WO/2018/130296    International Application No.:    PCT/EP2017/050670
Publication Date: Fri Jul 20 01:59:59 CEST 2018 International Filing Date: Sat Jan 14 00:59:59 CET 2017
IPC: H01H 9/34
H01H 9/42
H01H 9/36
H01H 33/59
Applicants: ABB SCHWEIZ AG
Inventors: ZHANG, Zichi
VALDEMARSSON, Stefan
Title: ARC CHUTE WITH SPLITTER PLATES INTERCONNECTED BY RESISTORS
Abstract:
A switchgear comprises a circuit breaking section (12) having a moveable contact bridging element (22) and at least one first arc chutes (18, 20) adjacent the contact bridging element (22), each arc chute (18, 20) comprising a base plate (BP1A, BP1B) for connecting to the contact bridging element (22) and a group of splitter plates (SP1A, SP2A, SP3A, SP4A, SP1B, SP2B, SP3B, SP4B) placed adjacent the base plate (BP1A, BP1B), where the splitter plates of the groups are separated from the base plate and each other via air gaps (G) and resistors (RA1, RA2, RA3, RB1, RB2, RB3) interconnect at least some of the plates in at least a first of the arc chutes (18) for bypassing corresponding air gaps, wherein the resistors have values in the range 5kΩ –1 MΩ, current ratings below 100 mA and power ratings below 1 W.