JP4884530B2 - Plug-connected surge arrester including one or more overvoltage protection elements - Google Patents

Abstract

The invention relates to a pluggable surge arrester comprising one or several overvoltage protection elements which are disposed within a structural unit comprising an optical fault indicator. The inventive surge arrester further comprises a thermal overcurrent protector (5) that encompasses an actuator for triggering a remote signalisation contact in order to indicate a fault. The structural unit comprises two chambers. The first lower chamber (1) accommodates an encapsulated spark gap or similar arrangement and the front sides of the lower chamber (1) are formed or delimited by plug-in contact surfaces (3) which are, respectively, electrically connected to the spark gap (2). A second upper chamber (4) accommodates the overcurrent protector. A partition (6) that fixes a wiring support (7) is provided between the lower and upper chambers. The plug-in contact surfaces (3) comprise a stabilisation bend (8) and extend into at least two connection lugs (9), the lower edges thereof respectively comprising a sliding or insertion ramp (10), the connection lugs (9) of the respective front sides being parallel in relation to each other.

Description

  The present invention mechanically or electrically accommodates a pluggable surge arrester including one or more overvoltage protection elements according to the preambles of claims 1 and 6, respectively, and at least one of those pluggable surge arresters. For the base part for.

  A surge arrester including a remote signal contact for sending an earth leakage signal is known from German utility model DE 20 2004 006 227. According to this prior art, the activation of the mechanism without potential is achieved by thermal monitoring of the inserted varistor or by the main spark gap activation unit inserted in the corresponding plug-in part, and the activation force Are transmitted by springs preloaded by sliders or flexible plates, respectively.

  In the base part of this conventional overvoltage protection device, the mechanical movement is transmitted to the microswitch by means of a moving ram and a rotationally mounted switching swing arm, which has a switching contact with no potential at its output.

  A multi-pole surge arrester for use in a low-voltage power supply system is known from German Patent DE 100 01 667 C1, which is a single unit comprising an active line and a connection terminal in the base part body for PE or ground potential. Guide means for removably receiving a plug-type part comprising a substantially U-shaped base part and comprising a varistor or spark gap element electrically connectable to the connection terminal is provided in the covering hood of the base part It is done.

  As mentioned above, a conventional multipole surge arrester is inserted into a substantially U-shaped base piece. For this purpose, the surge arrester is provided with a plug-in contact.

  However, plug-in contacts are prone to melting when high surge current conduction capability is required. If the contact force of the counter contact element has been increased by press fitting, each surge arrester is difficult to remove for replacement without a mechanical tool, which is a major maintenance disadvantage.

  Based on the foregoing, it is an object of the present invention to provide further developed plug-connected surge arresters and base parts that mechanically or electrically accommodate them, thereby making the design particularly compact. The required plug-in contact between the surge arrester and the mating contact in the base part has an excellent ability to conduct surge currents up to 100 kA. Furthermore, the object of the present invention guarantees a high surge current carrying capability of this plug-in contact without applying excessive mechanical force and / or without the need to use mechanical tools when inserting or removing the surge arrester. It is to be.

  The solution to the object of the invention is achieved by a combination of features according to the teachings of claims 1 and 6, and the dependent claims define at least useful embodiments and developments.

  In accordance with the present invention, the pluggable surge arrester includes two chambers, and the first lower chamber contains an enclosed spark gap or similar arc extinguishing configuration.

  The front side of the lower chamber is formed by plug-in contact surfaces or is bounded by those plug-in contact surfaces each connected to a spark gap. A screw contact is preferably selected between the plug-in contact surface and the respective spark gap.

  The second upper chamber contains an overcurrent protector and / or other electronic unit known per se.

  A partition is provided between the lower chamber and the upper chamber, which can fix the wiring support. In use, the wiring support can include an activation circuit.

  Plug-in contact surfaces made from metal punching materials include a stabilizing bend, which is preferably machined as an outer bend. Their bending and plug-in contact surfaces extend into at least two straight and large connecting lugs spaced apart, the lower ends of which each include a sliding or insertion ramp from a chamfered point of view. The respective connection lugs on the front side extend parallel to each other.

  The connecting lugs are linearly aligned on the respective front side.

  The lower chamber can be sealed by a bottom adapted to fit the outer contour of the spark gap.

  In one embodiment, the spark gap is formed as a hollow cylinder. Therefore, the cross section of the bottom has a circular shape or a partial shape of the circular shape.

  In another embodiment of the present invention, the at least one plug-in contact surface includes an extension that is integral with the opposite end of the connection lug, which is electrically connected to the wiring support. This makes it possible to implement part of the wiring between the spark gap and, for example, an electrical activation system, without additional work.

  The base part according to the invention for housing at least one, preferably a plurality of pluggable surge arresters, mechanically or electrically is substantially U-shaped and leak-free remote signal transmission without potential As well as contact means and contact terminals known per se.

  An extension portion extends substantially vertically upward from the bottom of the base component, and each connection terminal is received while being guided in a recess provided therein.

  Each connection terminal has a contact counterpart, which has a U or V shape with an opening facing away from the bottom part.

  The pre-formed spring parts are inserted between the legs of the respective contact counterparts, including guide bends, corresponding to the connection lugs of each surge arrester when the surge arrester is inserted.

  Furthermore, a recess is provided in the bottom of the base part, which has a U-shape or a V-shape corresponding to one of the contact counterpart parts and fixes the contact counterpart part in the lateral direction.

  The first leg of the contact counterpart component extends into or is connected to each connection terminal. On the inner side, the second leg of the contact partner part contacts the equally flat connection lug of the inserted surge arrester, respectively, in large area or in total.

  The contact mating parts can be designed in a current-dividing manner similar to the connection lugs, i.e. spaced apart in their U-shaped or V-shaped regions.

  In the combined modular arrester, a plurality of connection terminals having contact counterpart parts can be provided on the base part, and several surge arresters can be accommodated in parallel.

  In the TT-system, an internal N / PE bridge is provided, which is arranged in the space between the plug-in positions of the two surge arresters in the form of preformed metal parts, It is negatively connected to the contact counterpart part, preferably connected by rivets.

  Each second leg of the pair of contact mating parts can have a portion extending obliquely in the width direction.

  In other embodiments, the diagonally extending portions of each pair of second legs can be designed to extend opposite each other.

  The shape of the diagonally extending portion is selected to complement the design on the lower side of the U-shaped base part in the region of the connection terminal for the purpose of placing the connection terminal in the center. Furthermore, the diagonally extending portion allows the surge arrester to be easily inserted into the base part provided with the contact counterpart part.

It is a perspective view which shows an overcurrent protector, a spark gap, and a plug connection type surge arrester including the structural unit which consists of two chambers. It is a figure which shows the bottom part of the base component provided with a connection terminal and an internal N / PE bridge. FIG. 6 shows a surge arrester having an upper chamber sidewall and an extension that carries current from a spark gap to an electronic device on a wiring support. It is a figure which shows the detail of the U-shaped contact counterpart component which has the surge arrester already inserted and the connection lug has reached the final position of the U-shaped part of a contact counterpart component. It is a perspective view which shows the base part of a U shape which can accommodate several surge arresters. FIG. 3 shows the lower side of a U-shaped base part with a recognizable part placed or fixed at the bottom of FIG. 2. FIG. 2 shows a completed device as a combined arrester, for example a TT-system.

  Hereinafter, the present invention will be described in detail by embodiments with reference to the drawings.

  The plug-connected surge arrester according to FIGS. 1 and 3 includes a first lower chamber 1 for accommodating, for example, an enclosed spark gap 2.

  The front side of the lower chamber 1 is formed by a plug-in contact surface 3 or bounded by such a metal plug-in contact surface 3.

  The plug-in contact surface 3 is electrically and mechanically connected to the corresponding electrode of the spark gap 2 by a screw connection.

  The second upper chamber 4 can include an overcurrent protector 5, a ground fault indicator (not shown) or other electronic component.

  For example, the partition wall 6 made of a synthetic material is disposed between the lower chamber and the upper chamber and accommodates the wiring support 7. The wiring support 7 is preferably designed as a printed circuit board and can mechanically support the above-described overcurrent protector 5 and assist the electrical interconnection function.

  The plug-in contact surface 3 has a stabilizing bend 8, which is directed outward in the illustrated embodiment.

  Furthermore, the plug-in contact surface 3 extends into at least two connecting lugs 9 that are spaced apart, the lower ends of which each have a sliding or insertion ramp 10. Furthermore, the respective connection lugs 9 on the front side extend in parallel to each other.

  The respective connection lugs on the front side are each arranged or arranged linearly, i.e. they extend in a straight line.

  The lower chamber 1 can be sealed by a bottom 11, which conforms to the outer contour of the spark gap 2 and is preferably made from a synthetic material.

  The bottom 11 can be provided with an integrated extension 11.1, which defines a limit stop when the plug-type surge arrester is inserted into the base part.

  The upper chamber 4 includes two side walls 12 extending parallel to the upper direction from the partition wall 6. This allows the plug-type surge arrester to be completely sealed with a simple cap as can be seen in FIG.

  At least one plug-in contact surface includes an extension 13 integrated at an end facing the connection lug 9 and is electrically connected to the wiring support 7. As a result, it is possible to supply a potential necessary for starting the start circuit and / or the overcurrent protector.

  The base part for mechanically or electrically housing at least one, preferably a plurality of pluggable surge arresters is described in more detail with reference to FIGS. 2, 4, 5, and 6. FIG.

  The spaced apart extensions 15 extend substantially vertically upward from the bottom 14 of the base part, which guides the respective connection terminals 16 and secures them from displacement.

  Each connection terminal 16 has a contact counterpart 17 which is U-shaped, i.e. with a free opening away from the bottom 14 and facing upward.

  A preformed spring part 19 including a guide bend 20 is inserted between the legs 18 of the respective contact part 17. The pre-formed spring part is preferably formed from an element produced by stamping and bending and is captured and held between the legs 18 of the contact counterpart 17 by its given shape.

  At the opening end, the guide bend 20 faces the direction of each connection terminal, and a space for introducing or inserting a surge arrester including the connection lug 9 is formed.

  As a supplement, a recess is provided in the bottom portion 14, the shape of which corresponds to the shape of the contact counterpart component, and the contact counterpart component is fixed in addition to the extension portion 15.

  The first leg 18.1 of the contact counterpart 17 extends into or is connected to the respective connection terminal 16, and the second leg 18.2 is inserted on the inner side thereof. A large area is brought into contact with each connection lug 9 of the surge arrester.

  In the U-shaped region, the contact counterpart 17 is designed in a current dividing manner, like the connection lugs 9 that are spaced apart (see FIG. 2).

  According to FIG. 2, two opposing rows of connecting elements with connecting terminals or contact counterparts can be provided in the base part so as to accommodate several surge arresters side by side.

  For the TT-system, an internal N / PE bridge 200 is provided, which is placed in the space between the plug-in positions of the two surge arresters in the form of preformed metal parts, each contact counterpart part. 17 is preferably connected with negative polarity by rivets.

  Each second leg 18.2 of the pair of contact counterpart components can have a portion 21 extending obliquely in the width direction (see FIG. 2). As shown in FIG. 2, these diagonally extending portions can extend facing each other. By carrying out diagonally in the width direction of each leg 18.2, when the surge arrester is inserted, the frictional contact initially develops in the smaller width portion rather than the entire width of all the connecting lugs 9.

  The shape of the diagonally extending portion 21 can be selected to be complementary to the design 24 on the lower side 23 of the U-shaped base part 22 within the area of the connection terminal for the purpose of placing the connection terminal in the center. it can. This embodiment of the design 24 is shown in FIG. The slanted surface shown therein has a shape similar to the slanted extension 21 of the second leg 18.2, resulting in the aforementioned central arrangement when placing this base part 22 on the bottom 11, which Is completed with connection terminals and bridges.

  In the completed device diagram of FIG. 7, a total of four surge arresters forming a combined arrester are housed in the base part, which includes useful internal wiring using the aforementioned bridges. The corrugated gripping surface 25 facilitates gripping and pulling of the respective arresters and eliminates the need for auxiliary tools.

DESCRIPTION OF SYMBOLS 1 1st chamber 2 Spark gap 3 Plug-in contact surface 4 2nd chamber 5 Overcurrent protector 6 Bulkhead 7 Wiring support body 8 Bending 9 Connection lug 10 Insertion inclination 11 Bottom part 11.1 Extension part 12 Side wall 13 Extension part 14 Bottom part 15 Extension part 16 Connection terminal 17 Contact partner part 18 Leg 18.1 First leg 18.2 Second leg 19 Pre-formed spring part 20 Guide bending 200 N / PE bridge 21 Diagonal extension part 22 U-shaped base part 23 Lower side 24 Design 25 Gripping surface

Claims (13)

Plug comprising a thermal overcurrent protector including one or more overvoltage protection elements mounted on a structural unit having a visual leakage indicator and including an activation device that activates a remote signal transmission contact to indicate the leakage A connection type surge arrester,
Wherein said structural unit has two chambers, the first lower chamber (1) accommodates a spark gap which is sealed (2), the front side of the lower chamber is electrically connected to the spark gap (2), respectively Plug-in contact surface (3) formed or bounded, the second upper chamber (4) houses the overcurrent protector (5),
A partition (6) for securing the wiring support (7) is provided between the lower and upper chambers (1; 4);
The plug-in contact surface (3) includes a stabilizing bend (8) and extends into at least two connecting lugs (9), the lower ends of which each include a sliding slope or an insertion slope (10), respectively Surge arrester, characterized in that the connection lugs on the front side of the tube extend parallel to each other.   Surge arrester according to claim 1, characterized in that the connection lugs (9) are arranged in alignment with each other on the respective front side.   Surge arrester according to claim 1 or 2, characterized in that the lower chamber (1) can be sealed by a bottom (11) that conforms to the outer contour of the spark gap (2).   Surge according to any one of the preceding claims, characterized in that the upper chamber (4) comprises two side walls (12) extending parallel to the upper direction from the partition wall (6). Arresta.   At the opposite end of the connection lug (9), at least one plug-in contact surface (3) includes an integral extension electrically connected to the wiring support (7). The surge arrester according to any one of claims 1 to 4. 6. The at least one of claims 1 to 5, which is U-shaped and includes switching means for remotely transmitting a leakage state without having a potential, a contact counterpart component, and a connection terminal. the plug-connected surge arrester be mechanically or electrically basal part which accommodates,
A spacing extension (15) extends from the bottom (14) which guides and houses each connection terminal (16),
The connection terminals (16) each have a contact counterpart component (17) having a U-shape or V-shape with an opening facing the back (14);
Pre-formed spring parts (19), including guide bends (20), corresponding to the respective connection lugs (9) of the surge arrester when the surge arrester is inserted, are the legs of the respective contact counterpart (17). A base part inserted between (18).   A recess having a U shape or a V shape is provided in the bottom (14), corresponding to one of the contact counterparts (17), for fixing the contact counterpart in the correct position. Item 7. The base part according to item 6.   The first leg (18.1) of the contact part extends into or is connected to the respective connection terminal, and the second leg (18.2) is inserted on its inner side. 8. Base component according to claim 6 or 7, characterized in that it contacts each connecting lug (9) of the surge arrester in a large area.   7. In the U-shaped or V-shaped region, the contact mating part (17) is designed in a current-dividing manner, like the connecting lugs (9) spaced apart. The base part as described in any one of 1 to 8. A plurality of connection terminals (16) with contact mating parts (17, 18.1, 18.2) for accommodating several surge arresters side by side;
An internal N / PE bridge (200) is provided for the TT system and is placed in the space between the plug-in locations of the two surge arresters in the form of pre-formed metal parts, each contact counterpart ( characterized in that it is connected with a negative polarity to 17), the base component according to any one of claims 6 9.   10. The respective second leg (18.2) of a pair of contact counterparts (17) has a portion (21) extending obliquely in its width direction. The base part of.   12. Base component according to claim 11, characterized in that the diagonally extending portions (21) of each pair of second legs extend facing each other.   The shape of the diagonally extending portion (21) is a complement to the design on the lower side (23) of the U-shaped base part (22) within the area of the connection terminal for the purpose of placing the connection terminal in the center. Base component according to claim 11 or 12, characterized in that

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