EARTHING SWITCH FOR SWITCHGEAR AND SWITCHGEAR

Title:

EARTHING SWITCH FOR SWITCHGEAR AND SWITCHGEAR

Document Type and Number:

WIPO Patent Application WO/2020/223884

Kind Code:

A1

Abstract:

Embodiments of the present disclosure provide a earthing switch for a switchgear. The earthing switch comprises a plurality of fixed contacts arranged in a plurality of phases of the switchgear; and a plurality of movable contacts operable to rotate by an operating mechanism of the switchgear so that the movable contacts can be coupled to or decoupled from the respective fixed contacts, wherein each of the movable contacts comprises a tubular blade mounted on the operating mechanism, a first end of the tubular blade being flattened. By using the tubular blade as a movable blade, the earthing switch can withstand a large current with less copper material being used due to a better current carrying capacity of the tubular blade. Furthermore, the first end of tubular blade where the tubular blade is mounted on the operating mechanism is flattened, which gives the tubular blade a higher flexural strength and tensile strength. Moreover, the tubular blade can be made in a cost efficient way.

More Like This:

WO/2015/154957

A KNIFE SWITCH ASSEMBLY, AN ELECTRIC POWER DISTRIBUTION SWITCHGEAR AND A METHOD FOR PREVENTING ELECTRIC DISCHARGES

Inventors:

QIU XUEDONG (CN)
XIE JIEWEI (CN)

Application Number:

PCT/CN2019/085733

Publication Date:

November 12, 2020

Filing Date:

May 06, 2019

Export Citation:

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Assignee:

ABB SCHWEIZ AG (CH)
QIU XUEDONG (CN)
XIE JIEWEI (CN)

International Classes:

H01H31/00; H02B13/075

Foreign References:

CN208315448U	2019-01-01
CN206774437U	2017-12-19
CN208522348U	2019-02-19
CN201673844U	2010-12-15
KR20090011780A	2009-02-02
CN206432192U	2017-08-22
EP3367408A1	2018-08-29
US2227925A	1941-01-07

Other References: