WO1999000809A2 - Low-voltage power switch with an actuating shaft - Google Patents
Low-voltage power switch with an actuating shaft Download PDFInfo
- Publication number
- WO1999000809A2 WO1999000809A2 PCT/DE1998/001406 DE9801406W WO9900809A2 WO 1999000809 A2 WO1999000809 A2 WO 1999000809A2 DE 9801406 W DE9801406 W DE 9801406W WO 9900809 A2 WO9900809 A2 WO 9900809A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- low
- switching
- circuit breaker
- voltage circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/022—Details particular to three-phase circuit breakers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H2009/0094—Details of rotatable shafts which are subdivided; details of the coupling means thereof
Definitions
- the invention relates to a multi-pole low-voltage circuit breaker with fixed and movable switch contacts, a drive device that actuates the movable switch contacts for switching on and off, and with a switch shaft for transmitting a driving force from the drive device to the movable switch contacts, the switch shaft being a central shaft and radially thereof protruding levers, which are connected to the drive device or to the switch contacts.
- a circuit breaker with these features is described, inter alia, in DE 40 22 078 AI or DE 44 16 088 Cl.
- the switching shaft is a core element of the switching mechanism of the circuit breaker, since it takes over the mechanical switching forces from the drive device common to all poles and forwards them to every movable switching contact of the circuit breaker.
- the selector shaft interacts with latching devices to maintain the switch-on and switch-off positions.
- Switching shafts are a special case in two respects.
- the stress on a selector shaft is atypical in that it does not have a rotating, uniformly loaded load Represent part, but only perform a fraction of a revolution with changing direction of rotation and extremely jerky movement.
- Circuit breakers at important points in electrical systems such as power distribution and supply of entire production lines.
- the demand for a far above-average reliability of the control shafts is also based on the fact that the position of the control shaft in the switching mechanism of a circuit breaker means that it is completely beyond the observation of a user and therefore there is no possibility of timely detection of any damage that may occur.
- circuit breakers With a service life of far more than the number of operating cycles of 10,000 required in the relevant regulations. As the worldwide demand for circuit breakers increases and so does it other areas of application are opened up, it is in the interest of the user to provide circuit breakers of high quality as inexpensively as possible.
- the invention is intended to make a significant contribution to this.
- this is done in that at least a section of the central shaft and an associated part of the protruding levers are designed as a one-piece switching shaft unit produced in a metal casting process.
- the present invention overcomes the previous conviction of experts that the unusual stresses described at the outset can only be mastered by means of control shafts made of steel parts.
- casting processes have long been used in mechanical engineering to produce shafts, casting shifters has not been considered.
- the use of a casting process in switch construction enables a not inconsiderable cost reduction, which is all the more significant the larger and more complicated the switching shaft is.
- Die-casting processes are particularly suitable in the context of the invention, because they are known to lead to particularly dimensionally accurate castings with a good surface finish.
- Two zinc and aluminum based material compositions commonly used in die casting are suitable for the purposes of the invention.
- a switching shaft for a three-pole low-voltage circuit breaker with a nominal current of 1000 A and a switching capacity of 50 kA was manufactured as a one-piece die-cast aluminum part and tested in an endurance test. All life requirements have been met. It was possible to measure the dimensions of the previous used steel selector shaft approximately and thus also the dimensions of the previous circuit breaker.
- At least one conical recess is arranged centrally in the central shaft of the selector shaft unit.
- FIG. 1 shows a selector shaft designed as a die-cast part in a partial longitudinal section.
- FIG. 2 shows an end view of the selector shaft according to FIG. 1.
- FIG. 3 shows a selector shaft composed of two sections.
- the one-piece shift shaft unit 1 in FIG. 1 is made of die-cast aluminum. This manufacturing process and the aluminum alloys suitable for it are known. All the necessary information can be found in the specialist literature for metallurgical processes. It is not a special embodiment of such a manufacturing method for the invention, but rather its application for manufacturing of shift shafts essential.
- the switching shaft unit 1 includes a central shaft 2, three levers 3 for actuating the movable switching contacts of a circuit breaker, as z. B. is described in the patent documents mentioned.
- the middle lever 3 can at the same time
- Coupling a drive device of the circuit breaker serve.
- rounded curves 4 at the foot of the lever 3 ensure a good flow of force.
- Levers have a region surrounding the central shaft in an eyelet-like manner, the lever 3 protrudes from the central shaft 2 on one side. This saves space in the switching mechanism of the circuit breaker.
- FIGS. 3 and 4 illustrate a split version of a selector shaft, the selector shaft units 6 and 7 of which are approximately half the length of the selector shaft unit 1 shown in FIG. 1.
- Both shift shaft units have a central shaft 8 or 9, each with two conical recesses 5.
- the distribution in the example shown is asymmetrical such that the selector shaft unit 6 has two of the levers 3, while the selector shaft unit 7 has a clutch arm 10 and the remaining lever 3.
- the switching shaft unit 7 engages with the coupling arm 10 the selector shaft unit 6.
- a central shoulder 11 of the selector shaft unit 7 engages in a central recess 12 of the selector shaft unit 6.
- switching shafts for four-pole circuit breakers or circuit breakers which have several movable switching contacts per pole can also be produced with a corresponding design.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Circuit Breakers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59802552T DE59802552D1 (en) | 1997-06-26 | 1998-05-19 | LOW VOLTAGE CIRCUIT BREAKERS WITH A SWITCHING SHAFT |
EP98934772A EP0992046B1 (en) | 1997-06-26 | 1998-05-19 | Low-voltage power switch with an actuating shaft |
JP50520199A JP2002506558A (en) | 1997-06-26 | 1998-05-19 | Multi-pole low-voltage circuit breaker with operating axis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19727853.1 | 1997-06-26 | ||
DE19727853A DE19727853C1 (en) | 1997-06-26 | 1997-06-26 | Low-voltage circuit breakers with one switching shaft |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999000809A2 true WO1999000809A2 (en) | 1999-01-07 |
WO1999000809A3 WO1999000809A3 (en) | 1999-04-15 |
Family
ID=7834159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001406 WO1999000809A2 (en) | 1997-06-26 | 1998-05-19 | Low-voltage power switch with an actuating shaft |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0992046B1 (en) |
JP (1) | JP2002506558A (en) |
DE (2) | DE19727853C1 (en) |
WO (1) | WO1999000809A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014224261A (en) * | 2002-05-24 | 2014-12-04 | 松本油脂製薬株式会社 | Method for producing resin composition |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19860717A1 (en) | 1998-12-23 | 2000-06-29 | Siemens Ag | Switching shaft for a multi-pole electrical circuit breaker and process for its manufacture |
DE10010727C2 (en) * | 2000-02-29 | 2002-03-07 | Siemens Ag | Switch lock for a low-voltage circuit breaker |
DE10340226A1 (en) * | 2003-08-28 | 2005-03-31 | Siemens Ag | Cast switching shaft for circuit breaker and corresponding manufacturing process |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0292850A2 (en) * | 1987-05-28 | 1988-11-30 | Mitsubishi Denki Kabushiki Kaisha | Multipole ciruit breaker |
WO1993020576A1 (en) * | 1992-04-01 | 1993-10-14 | Siemens Aktiengesellschaft | Multi-pole low-voltage power switch with a switching shaft |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4022078A1 (en) * | 1990-07-10 | 1992-01-16 | Siemens Ag | CIRCUIT BREAKER WITH INDEPENDENT INTERLOCKING DEVICE OF THE MOVABLE SWITCHING CONTACT |
DE4416088C1 (en) * | 1994-04-20 | 1995-06-14 | Siemens Ag | Lever linkage mechanism for transmission of drive force in electrical power switch |
-
1997
- 1997-06-26 DE DE19727853A patent/DE19727853C1/en not_active Expired - Fee Related
-
1998
- 1998-05-19 EP EP98934772A patent/EP0992046B1/en not_active Expired - Lifetime
- 1998-05-19 DE DE59802552T patent/DE59802552D1/en not_active Expired - Fee Related
- 1998-05-19 WO PCT/DE1998/001406 patent/WO1999000809A2/en active IP Right Grant
- 1998-05-19 JP JP50520199A patent/JP2002506558A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0292850A2 (en) * | 1987-05-28 | 1988-11-30 | Mitsubishi Denki Kabushiki Kaisha | Multipole ciruit breaker |
WO1993020576A1 (en) * | 1992-04-01 | 1993-10-14 | Siemens Aktiengesellschaft | Multi-pole low-voltage power switch with a switching shaft |
Non-Patent Citations (1)
Title |
---|
See also references of EP0992046A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014224261A (en) * | 2002-05-24 | 2014-12-04 | 松本油脂製薬株式会社 | Method for producing resin composition |
Also Published As
Publication number | Publication date |
---|---|
WO1999000809A3 (en) | 1999-04-15 |
EP0992046A2 (en) | 2000-04-12 |
JP2002506558A (en) | 2002-02-26 |
EP0992046B1 (en) | 2001-12-19 |
DE19727853C1 (en) | 1998-11-26 |
DE59802552D1 (en) | 2002-01-31 |
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