Vacuum interrupter

Patent metadata

Field	Value
Publication number	US-9281145-B2
Application number	US-201414280661-A
Country	US
Kind code	B2
Filing date	May 18, 2014
Priority date	Mar 2, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A vacuum interrupter, including: an insulating housing; a movable end cap; a stationary end cap; a pair of movable and stationary contacts; and a pair of shields. The pair of shields is fixed on the movable end cap and the stationary end cap, respectively. The insulating housing, the movable end cap, and the stationary end cap cooperate to form a closed space. The closed space includes a movable fracture and a stationary fracture. The movable fracture is formed by the pair of movable and stationary contacts for carrying rated current and disconnecting capacitive load whereby achieving breaking performance of the vacuum interrupter. The stationary fracture is formed by the pair of shields. When the pair of stationary and movable contacts reaches a full open position, the stationary contact and the movable contact enter the pair of shields, respectively.

First claim

The invention claimed is:

1. A vacuum interrupter, comprising:
a first insulating housing;
a second insulating housing;
a first end cap;
a second end cap;
a stationary end cap;
a first movable contact;
a second movable contact;
a first movable conductive rod;
a second movable conductive rod;
a stationary contact;
a first bellows;
a second bellows;
a first movable end shield;
a second movable end shield;
a stationary end shield; and
a stationary end plate;

wherein:
the first insulating housing, the second insulating housing, the first end cap, and the second end cap are connected to form a closed space;
the closed space is in a vacuum state;
the stationary end plate is disposed in a middle part of the closed space and divides the closed space into a first closed space and a second closed space;
the stationary contact is fixed on the stationary end plate;
the first movable conductive rod passes through the first end cap;
one end of the first movable conductive rod is disposed inside the first closed space, and the other end of the movable conductive rod is disposed outside the first closed space;
the first movable conductive rod is capable of moving upward and downward;
the end of the first movable conductive rod disposed inside the first closed space is nested within the first bellows and comprises an end point being fixed together with the first movable contact;
one end of the first bellows is fixed on the first end cap, and the other end of the first bellows is fixed on the first movable conductive rod;
the second movable conductive rod passes through the second end cap;
one end of the second movable conductive rod is disposed inside the second closed space, and the other end of the second movable conductive rod is disposed outside the second closed space;
the second movable conductive rod is capable of moving upward and downward;
the end of the second movable conductive rod disposed inside the second closed space is nested within the second bellows and comprises an end point being fixed together with the second movable contact;
one end of the second bellows is fixed on the second end cap, and the other end of the second bellows is fixed on the second movable conductive rod;
a first movable fracture is formed between the first movable contact and the stationary contact;
a second movable fracture is formed between the second movable contact and the stationary contact;
the first movable end shield is fixed on the first end cap;
the second movable end shield is fixed on the second end cap;
the stationary end shield is fixed on the stationary end plate;
a first stationary fracture is formed between the first movable end shield and the stationary end shield, and a second stationary fracture is formed between the second movable end shield and the stationary end shield; and
when the first movable fracture and the second movable fracture reach a full open position, the first movable contact and the second movable contact enter the first movable end shield and the second movable end shield, respectively; and
the first movable contact, the second movable contact, and the stationary contact are shielded by the first movable end shield, the second movable end shield, and the stationary end shield, respectively.

2. The vacuum interrupter of claim 1 , wherein when the first movable fracture and the second movable fracture reach a full open position, a DC recovery voltage is exerted on the first stationary fracture and the second stationary fracture.

Assignees

• Univ Xi An Jiaotong

Inventors

• Wang Jianhua
• Yan Jing
• Geng Yingsan
• Liu Zhiyuan
• Yang He

Classifications

• H01H33/66261 Primary

  Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations · CPC title

• H01H33/662 Primary

  Housings or protective screens · CPC title

• H01H2033/66284

  Details relating to the electrical field properties of screens in vacuum switches · CPC title