Large power switch
A high-power switch and location technology, applied in electrical switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve problems such as difficulty in ensuring arc extinguishing, and achieve reduced possibility, high withstand voltage strength, and high arc extinguishing. Effect of Gas Density
Active Publication Date: 2012-10-10
HITACHI ENERGY SWITZERLAND AG
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Especially for terminal short circuit (T100a), it is difficult to reliably avoid such back arcing with reference to IEC-Norm 62271-100, and it is difficult to ensure reliable arc extinguishing
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0103] figure 1 A part of a high-power switch according to the invention is schematically shown in cross-section, which can be passed through an arc-extinguishing gas such as SF 6 or N 2 and SF 6 mixture for filling. The switch has a first arcing contact 1, which is formed as a tulip contact. The first arcing contact 1 is surrounded by an auxiliary nozzle 13 , which together with the insulating nozzle 5 forms a channel 7 designed as a ring channel 7 . The insulating nozzle forms an essentially cylindrical constriction 6 for guiding the quenching gas flow. A diameter-widening region 21 with an opening angle α≈45° adjoins the narrowing point 6 . The channel 7 connects the constriction 6 to a heating chamber 11 for temporarily storing the quenching gas. On the side of the constriction 6 facing away from the first contact 1 , a pin-shaped second arcing contact 2 is arranged. Advantageously, the switch has exactly two arcing contacts.
[0104] The diameter of the cylinder a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
Login to View More
Abstract
A heavy-duty circuit breaker can be filled with a quenching gas and comprises a first (1) and a second arcing contact piece (2) and a heating chamber (11) for temporarily storing quenching gas heated by an arc (4). An insulating nozzle (5) is provided with a throat (6) in order to direct a quenching gas flow (s3) along an axis (A). An expanded zone (21) adjoins said throat (6) which is provided with a cross-sectional area F that extends perpendicular to the axis (A) in the vicinity of the expanded zone (21). A distance d between the throat (6) and the second arcing contact piece (2), which is measured along the axis (A), lies within a specific range at least as long as the quenching gas (s3, s4) can at least locally flow at sonic or supersonic speed in the course of a switching-off process once the contact has been separated during a quenching phase in which quenching gas is able to flow (s3) through the throat (6) in the direction (z2) of the second arcing contact piece (2), at least when the quenching gas can at least locally flow (s3, s4) at sonic or supersonic speed. Said range is given by the fact that the cross-sectional area available for penetration by the quenching gas flow (s3) in the expanded zone (21) corresponds at least to the area F, especially at least 1.5 times the area F, while the minimum quenching gas density prevailing in the throat (6) or between the throat (6) and the second contact piece (2) is greater than the minimum quenching gas density prevailing in or next to the second contact piece (2).
Description
technical field [0001] The invention relates to the field of high voltage switch technology. The invention relates to a high-power switch and a method for switching off the high-power switch according to the preambles of the independent claims. Background technique [0002] Such high-power switches have been known from the prior art for almost ten years. They have two arcing contacts and are filled with quenching gas. After contact separation, an arc may burn between the contacts. A heating chamber is provided for temporarily storing the quenching gas heated by the arc. An insulating nozzle has a constriction for guiding a flow of quenching gas, which is connected to the heating chamber. The arc is extinguished by the flow of arc extinguishing gas. A switch of this type can advantageously be formed as a damper switch (pneumatic piston switch) or as a self-pneumatic switch (Selbst-blasschalter) or as a combined damper switch-self-pneumatic switch combination. [0003] F...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/70
CPCH01H33/703
Inventor O・亨格M・克莱森斯M・霍尔斯坦J・阿布拉哈姆森M・克莱格尔
Owner HITACHI ENERGY SWITZERLAND AG