Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
  • H01H71/0271—Mounting several complete assembled circuit breakers together
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/08—Terminals; Connections
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
  • H01R4/28—Clamped connections, spring connections
  • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
  • H01R4/34—Conductive members located under head of screw
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
  • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
  • H01R11/12—End pieces terminating in an eye, hook, or fork
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
  • H01R4/28—Clamped connections, spring connections
  • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
  • H01R4/36—Conductive members located under tip of screw
  • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member

Definitions

• the invention relates to a switching device with housing, in particular circuit breaker, wherein at least one terminal is arranged in a housing formed in the switch housing, wherein the receptacle is closed at the front side at least partially by a cover.
• Such switching devices are used as a circuit breaker, in particular circuit breaker, in a variety of applications in use.
• Electrical switching devices must comply with specified safety regulations.
• the dense use of electrical switching devices such as in control boxes makes special security features for such switching devices necessary.
• Regulations such as the US UL 489 specify minimum distances between the externally accessible current-carrying conductors of neighboring electrical switching devices. For example, for switchgear up to an operating voltage of UN less than or equal to 300N, an air gap of at least 19.1 mm between two adjacent live conductors is prescribed. At an operating voltage of U ⁇ > 300N, the prescribed minimum air gap between two adjacent live conductors is already 25.4mm. Such air gaps between densely packed switching devices are realized on wider housing. This creates switching devices, which have housing volumes or housing widths that would not be necessary for their function. In addition to the resulting higher costs for the production, storage and transport of such switching devices, they require above all a lot of space.
• the shielding elements are arranged offset parallel to a housing outside and at a distance from the housing outside to the inside, so that when two switching devices arranged next to each other two shielding elements next to each other form a free gap.
• the path of the leakage current occurring is juxtaposed with juxtaposed similar switching devices, since the shielding of two adjacent, similar switching devices are not superimposed and results in a significantly extended creepage distance by the distance between the shielding and the gap formed thereby.
• a further embodiment of the invention can be provided that in the region of f eien gap recesses on the housing, preferably on the outside of the housing, in particular in the region of Klemmschrauböffhung, are provided to increase the depth of the free gap. Due to the geometry of the housing, the clamping screw openings present a juxtaposition of similar switching devices arranged side by side, which represents a particular danger due to leakage currents which are effectively reduced in this way.
• the at least one shielding element has an indentation, preferably extending over the entire surface of the shielding element, on at least one side, wherein the indentation forms a raised edge region for this. This further extends the leakage current path.
• the at least one shielding element comprises at least one stiffening rib.
• the invention further relates to a switching device, in particular circuit breaker, for electrical systems with a terminals having housing, wherein at least one housing part at least one arrangement for extending the creepage path is provided.
• the object of the invention is to provide a switching device in which an increased security against leakage currents between the electrically conductive regions of the terminals, in particular the Klemmschraubö Anlagenen, two adjacent identical switching devices is given, with unchanged outer dimensions as possible. According to this Invention, this is achieved in that a respective recess, recess or the like.
• the terminal associated Klemmschraubenöffhung on the outside of the housing is arranged, wherein between two juxtaposed housings in the area of Klemmschraubenöffhungen a free gap is formed.
• the invention relates to a switching device, in particular a circuit breaker, for electrical systems with a housing, with at least one cable clamp, comprising a movable box, a fixed box wrapped around this and a through opening of the solid box into a thread of the movable box with a head screwable against a clamping support clamping screw, the movable box forms together with the fixed box by means of a clamping screw adjustable Klemmöffhung for cable ends, further comprising a formed between the head of the clamping screw and the fixed box Klemmöffhung for cable lugs.
• Switchgear with such cable clamps are known and widely used. However, with such cable clamps only cable ends and so-called. Fork cable lugs can be clamped. Suction. Ring cable lugs can not be clamped with such a clamp or only with great difficulty.
• the clamping screw To clamp a ring cable lug, the clamping screw must completely release the clamping opening to allow insertion of the ring cable lug into the clamping opening.
• switches means are provided to prevent the falling out of the clamping screw from the cable clamp. Such switches are completely eliminated for operation with ring cable lugs.
• the object of the invention is therefore to provide a switching device according to the preamble of
• Clamping screw head arranged thread-free area of the clamping screw comprises.
• the thread-free region of the clamping screw has a cross-sectional taper.
• a portion can be formed on the clamping screw, which is adapted to receive a part with an internal thread, without moving it.
• the plate has a passage opening for the clamping screw, which at least parts of a
• Thread includes.
• Thread of the moving box the threaded part of the plate takes over the screw and ensures the complete unscrewing from the clamping area, which is now formed between the plate and the clamping pad.
• Fig. 1 shows two switching devices according to claim 1 and 6 in axonometric representation
• FIG. 2 shows two switching devices according to FIG. 1 in plan view
• Fig. 3 is a cable clamp of a switching device according to claim 9 in axonometric
• FIG. 4 shows a cable clamp according to FIG. 3
• FIG. 5 shows a cable clamp according to FIG. 3 with a ring cable clamp
• FIG. 6 is a sectional view of a switching device according to FIG. 1 with a cable clamp according to FIG.
• Figs. 1 and 2 show two switching devices S according to the invention, with housing 2, in particular
• connection terminal 1 is arranged in a receptacle 36 formed in the housing 2, the receptacle 36 being closed at the front by at least one area by a cover 30, at least one plate-shaped or rib-shaped one projecting beyond the front cover 30
• Shielding element 3 is integrally formed on the housing 2.
• the invention is not limited to the application in switching devices S with only one switching path, but may be used in switching devices S with a plurality, in particular two or four switching paths.
• Inventive switching devices have a housing 2, which is constructed of insulating material.
• the housing has a base body with housing outer sides 32, which in the preferred arrangement of switching devices according to the invention on a mounting rail, as
• the main body of the housing 2 erf ⁇ ndungswasher switching devices S also has a top surface 37, which openings for controls, such as a handle 38 or a test button, may have.
• the main body points further
• Housing front sides 35 which are connected to the housing outer sides 32 substantially, or limited by these.
• the housing 2 has at least one receptacle 36 for at least one connection terminal 1.
• the receptacle 36 is arranged in the housing 2 in the region of the housing front side 36 and closed by a front cover 30 at least partially. It can be provided to perform the cover integral with the housing 2, such as when, as in the illustrated preferred embodiments, a two-part housing is provided. But it can also be provided to close the receptacles 36 by means of removable covers 30 or to cover.
• Klemmöffhungen 6 and or Klemmschraubenöffhungen 7 are formed for the terminals 1.
• switch boxes and fuse boxes are a variety of switching devices S, in particular circuit breakers, arranged in a confined space.
• switching devices S in particular circuit breakers
• they are usually relatively narrow and designed so that they can be arranged side by side in an advantageous space-saving manner.
• In the densely packed juxtaposition increases the risk of sparkover due to insufficient safety distances between the exposed current-carrying conductors.
• these conductors are parts of the terminals 1, which can not be completely isolated. It is therefore necessary to maintain safety distances between the live conductors.
• the minimum air path between neighboring live conductors required for use with operating voltages above 300 V leads to housing dimensions that are not justified by the function of the switching device S. Above all, the width of the switching device S increases, which the number of switching devices S to be accommodated on a given area is drastically reduced.
• switchgear devices S according to the invention have at least one front cover 30 according to claim 1 superior plate-shaped or rib-shaped shielding element 3, which is integrally formed on the housing 2.
• the case width can be maintained at the level of low-voltage switchgear (e.g., about 17.5 mm). This makes it possible to arrange much more switching devices S on a given area, than was previously possible.
• the at least one shielding element 3 is designed as a substantially flat plate 4 or rib 4.
• a plate 4 or rib 4 makes it possible in a particularly simple way to increase the air gap between the terminals 1 adjacent switching devices S.
• the concrete shape of such a plate 4 or rib 4, and generally the shape of a shielding element 3 according to the invention results from the housing dimensions and the required air gaps between two adjacent switching devices S.
• the plate-shaped or rippenfb '-shaped shield member 3 substantially over the entire housing height extends h, whereby also the area between a Klemmenöffhung and a nearest Klemmschrauböffhung can be effectively protected against impact.
• the housing height h designates the height of the housing 2 in the region of the housing front side 35, or in the region of the housing side, on which the terminals are arranged.
• the invention is particularly aimed at the use of switching devices S, which are provided to a side-by-side arrangement, and are characterized by uniform housing dimensions.
• switching devices S which are provided to a side-by-side arrangement, and are characterized by uniform housing dimensions.
• the switching device S in which it is not clear before mounting on which outside the next switching device S is arranged, it is advantageous if the switching device S has two spaced-apart shielding 3.
• the air gap between the current-carrying parts of two adjacent switching devices S can be extended most effectively when the shielding 3 are arranged substantially parallel to the clamping openings 6 and / or the Kleschraubenöffhung 7 of the terminals 1. In this way, the air gap can be most effectively extended with a minimum use of shielding 3, regardless of where in a possible switching device network, the switching device S is arranged.
• a possible conductive connection between adjacent live parts by air is not the only security risk in the operation of electrical switching devices S in a small space.
• Parasitic electrical currents, so-called leakage currents, can propagate along housing surfaces and thus lead to a conductive connection to an adjacent switching device S.
• the required minimum creepage distances are required longer than the air distances.
• the US-American UL 489 for switching devices S up to an operating voltage of U N equal to or less than 300 V provides a creepage distance of at least 31.8 mm between two adjacent live conductors.
• the prescribed creepage distance between two adjacent live conductors is already WeStk ⁇ i. conventional switching devices S arranged side by side without additional design measures, the creepage path is equal to the air gap.
• Switching devices S preferably have two essentially parallel shielding elements 3 on both sides of the clamping openings 6 and / or the clamping screw openings, so that at least two separate shielding elements 3 are provided between two adjacent terminal openings 6, forming a free gap 31 between the two shielding elements 3 , In switching devices S, which have more than one switching path, it can therefore be provided that two shielding elements are arranged between the adjacent connection terminals of a switching device S.
• the shielding elements 3 are arranged offset parallel to a housing outer side 32 and at a distance from the housing outer side 32 inwards, so that when two switching devices S arranged next to each other two shielding elements 3 closest to one another forming free gap 31.
• the shielding 3, executed in FIG. 2 as a plate 4 or rib 4, are moved away from the housing outside 32 away so far that it is ensured that the shielding 3 no contact with any existing adjacent switching device S or to an have this existing shield 3.
• the shielding elements 3 of adjacent switching devices S are not adjacent to one another and thus contribute to the lengthening of the creepage path.
• the shielding elements 3 do not extend to the area around the Klemmschrauböff openings 7. However, it may also be provided to arrange in this area shielding 3, or provide shielding 3, which also extend into this area , In embodiments in which the shielding elements 3 do not extend up to the region of the clamping screw openings 7, it is provided that in the region of the free gap 31 recesses 8 are provided on the housing 2, preferably on the outside of the housing 32, in particular in the area of the clamping screw opening 7 are to increase the depth t of the free gap 31, which is determined substantially by the shielding 3, in the region of Klemmschrauböffhung 7 to the depth ti without increasing the shielding 3.
• the clearly visible in Fig. 1 wells 8 lead to a significant extension of the existing creepage distance with respect to conventional components unchanged housing width.
• the design, number and shape of the According to the invention recess 8 is dependent on the local conditions and is adapted to the geometry of the respective switching devices S.
• the at least one shielding element 3 on at least one side preferably on the entire surface of the shielding 3 extending, indentation 33, wherein the indentation 33 forms a raised edge region 34 for this.
• the indentation 33 forms a raised edge region 34 for this.
• FIG. 1 and 2 show two juxtaposed particularly preferred embodiments inventive switching device S, in particular circuit breaker, for electrical systems with a terminal 1 having housing 2, wherein at least one housing part at least one arrangement for extending the creepage path is provided, each having a recess 8 side of one, the terminal 1 associated Klemmschraubenöffhung 7 is disposed on a housing outer side 32, wherein between two juxtaposed housings 2 in the area of Klemmschraubenöffhungen 7, a free gap 31 is formed.
• the at least one recess 8 in the region of a connection terminal 1, since in this area the occurrence of leakage currents is increasingly to be expected.
• the depression can also be formed approximately by a recess.
• FIG. 3 to 6 show the terminal 1 of a switching device S, in particular a circuit breaker, for electrical installations with a housing 2, with at least one terminal 1, comprising a movable box 10, a fixed box 11 wrapped around this and a through a through opening.
• a switching device S in particular a circuit breaker
• FIG. 9 the fixed box in a thread 12 of the movable box with a head 13 against a clamping pad 14 screwed clamping screw 15, the movable box 10 together with the fixed box 11 an adjustable by means of the clamping screw 15 terminal opening for cable ends 16, further comprising a between the Head 13 of the clamping screw 15 and the fixed box 11 formed Klemmöff ung for cable lugs 17, wherein means for complete
• Switchgear S have in many cases terminals 1, to which for receiving
• Cable ends and / or fork cable lugs are suitable.
• Ring cable lugs R can not be clamped with such a terminal 1 or only with great difficulty.
• Terminal 1 must be ensured that the clamping screw 15 the clamping area
• Terminals 1 are unsuitable for operation with ring cable lugs R. If it is possible to remove the clamping screw 15, this must be done with the help of a
• the means provided in a switching device S according to the invention ensure complete unscrewing of the clamping screw 15 from the clamping opening 17 and allow the operation of a switching device S according to the invention with ring cable lugs R.
• Cross-section of the thread has a cross-sectional taper 19.
• Thickness at most equal to the height of the unthreaded portion 18 of the clamping screw 15.
• Clamping screw 15 which comprises at least parts of a thread 22. This
• Through opening 21 may be executed open edge. This makes it possible to realize a particularly simple partial thread 22.
• Box 11 and the clamping screw 15 is arranged and has the opportunity to
• the plate 20 may be so far away from the clamping pad 14, before it rests against the housing parts that the case resulting gap between terminal support 14 and plate 20 is adapted to receive a ring terminal R cable.
• Embodiments for accommodating more than one ring cable lug R can also be provided.
• the plate 20 is arranged on the thread-free, cross-section-tapered region 18, 19 of the clamping screw 15.
• the clamping screw 15 must be screwed through the plate 20.
• the screw 15 is actuated such that this leads to the opening of the terminal 1. If the terminal 1 is fully open and the clamping screw 15 is moved in the same way, so you unscrewed the clamping screw 15 from the last threads of the thread 12 in the moving box 10 out. In this case, the clamping screw 15 lifts over the clamping pad 14 and takes the plate 20 with, until the movement of the plate 20 is inhibited by housing parts. A further rotation of the clamping screw 15 now causes the thread of the clamping screw 15 screwed into the partially existing thread 22 of the plate 20.
• a ring cable lug R is inserted into the clamping opening 17. It may be provided that the clamping screw 15 projects so far out of the terminal screw opening 7 at complete opening of the Klemmöff 17, that this is manually removably bar. However, this is not necessary for the operation of a switching device S with ring cable lugs R. In the preferred embodiment of a switching device S according to the invention, means are provided which prevent the clamping screw 15 from falling out of the clamping screw opening 7.
• the clamping screw 15 must be selected such that this almost completely unscrewing out of the thread 12 of the movable box 10, the plate 20 presses against the housing 2 such that the partial thread 22 of the plate 20 comes into engagement with the thread of the clamping screw 15 ,
• the length of the Thread 12 of the movable box 10 are selected such that this condition is met.
• Partial thread 22 of the plate 20 is disengaged, the clamping screw 15 engages with the thread 12 of the movable box 10 and can now be closed in a known manner.
• FIG. 6 shows a switching device S with a shielding element 3 and a connection terminal 1 with a ring cable lug R arranged therein.

Landscapes

• Switch Cases, Indication, And Locking (AREA)
• Patch Boards (AREA)
• Breakers (AREA)
• Connector Housings Or Holding Contact Members (AREA)
• Connections Arranged To Contact A Plurality Of Conductors (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34965856

Family Applications (1)

Country Status (11)

Cited By (2)

Families Citing this family (4)

Citations (9)

Family Cites Families (4)

• 2004
  • 2004-04-19 AT AT0067104A patent/AT504607A1/de not_active Application Discontinuation
• 2005
  • 2005-04-15 EP EP05730722A patent/EP1741117B1/de active Active
  • 2005-04-15 CN CN2005800164072A patent/CN1957432B/zh not_active Expired - Fee Related
  • 2005-04-15 ES ES05730722T patent/ES2371257T3/es active Active
  • 2005-04-15 SI SI200531404T patent/SI1741117T1/sl unknown
  • 2005-04-15 BR BRPI0510011-9A patent/BRPI0510011A/pt not_active IP Right Cessation
  • 2005-04-15 AU AU2005234093A patent/AU2005234093B2/en not_active Ceased
  • 2005-04-15 PL PL05730722T patent/PL1741117T3/pl unknown
  • 2005-04-15 RS RS20110468A patent/RS51972B/en unknown
  • 2005-04-15 AT AT05730722T patent/ATE521077T1/de active
  • 2005-04-15 WO PCT/AT2005/000132 patent/WO2005101443A2/de active Application Filing
  • 2005-04-15 JP JP2007507617A patent/JP2007533083A/ja active Pending

Patent Citations (9)

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