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Title:
MULTI-POLE DOUBLE-BREAKPOINT PLASTIC-SHELL CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2016/078482
Kind Code:
A1
Abstract:
A multi-pole double-breakpoint plastic-shell circuit breaker. Multiple single-pole circuit breaking unit (30) are disposed inside an insulation shell,. A contact system and a matching arc-extinguishing system are disposed inside a unit plastic-shell of each single-pole circuit breaking unit (30). A contact system of each pole comprises two fixed contacts (14, 16) arranged opposite and one bridge-shaped movable contact (20), and each bridge-shaped movable contact (20) is installed on one contact support (17, 18). Each arc-extinguishing system comprises two symmetrically disposed arc-extinguishing chambers (6, 9). Outer rings of multiple roller bearings (19) are fixedly installed on a separating wall (g) by using a bearing mechanism. An inner ring of a roller bearing (19) is directly linked to contact supports (17, 18) in a manner of interference fit. Two adjacent contact supports (17, 18) are directly inserted and linked in a manner of interference fit. One cylindrical cavity (b) for receiving the contact supports (17, 18) is disposed between two arc-extinguishing chambers (6, 9) of the unit plastic-shell of each single-pole circuit breaking unit (30). By means of the multi-pole double-breakpoint plastic-shell circuit breaker, not only high sensitivity and high precision of rotation supported by each contact are ensured, but also precision and synchronization requirements can be ensured through processing relying on precision of only a mold.

Inventors:
FENG WEITONG (CN)
LI KONGFU (CN)
GU XIANG (CN)
Application Number:
PCT/CN2015/091532
Publication Date:
May 26, 2016
Filing Date:
October 09, 2015
Export Citation:
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Assignee:
ZHEJIANG CHINT ELECTRICS CO LTD (CN)
International Classes:
H01H73/04; H01H71/10; H01H73/18
Foreign References:
CN204375671U2015-06-03
CN1416150A2003-05-07
CN101399137A2009-04-01
CN101604600A2009-12-16
CN102496529A2012-06-13
US6259338B12001-07-10
Other References:
See also references of EP 3223296A4
Attorney, Agent or Firm:
BEIJING JOYAN INTELLECTUAL PROPERTY OFFICE (CN)
北京卓言知识产权代理事务所(普通合伙) (CN)
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