DE102006000919A1 - Plug-in surge arrester with one or more overvoltage protection elements - Google Patents

Abstract

The invention relates to a pluggable surge arrester comprising one or several surge protection elements which are disposed within a structural unit with an optical fault indicator. The inventive surge arrester further comprises a thermal surge protector (5) that encompasses a mechanical actuator for triggering a remote indication contact in order to signal a fault. A linearly guided slide (1) is provided which is movable perpendicular to the plugging direction of the arrester and is equipped with an elastic tongue (2). The free end (3) of said tongue (2) can be blocked by a locking element (4). Furthermore, the thermal surge protector (5) is fitted with an actuating bolt (6) which acts upon the free end (3) of the tongue (2) when triggered in order to move the free end (3) out of the blocked position such that the slide (1) is released. The movable slide (1) has a free, web-shaped section (7) which penetrates a corresponding opening in the arrester housing. The invention also relates to a base part (16) for mechanically or electrically receiving at least one pluggable surge arrester, said base part (16) comprising a switching device (21) for the potential-free remote indication of fault states, especially a micro pushbutton (21).

Description

The The invention relates to a pluggable surge arrester with a or more overvoltage protection elements, which in a structural unit with an optical defect indicator are arranged, as well as with a thermal overcurrent protection device, this comprising a mechanical actuator for triggering a Telecommunication contact for error signaling according to the preamble of the claim 1.

Farther comprises the invention is a base part for mechanical and electrical recording at least one pluggable surge arrester.

From the German utility model DE 20 2004 006 227 is a surge arrester with telecommunications contact for error signaling previously known. The triggering of the potential-free mechanism takes place in this prior art by means of thermal monitoring varistors used or the trigger unit used network spark gaps in the corresponding plug-in parts, which is forwarded via biased springs by means of slide or flexible board. In the base part of the surge protection device, this mechanical movement is transmitted by means of actuating plunger and a rotatably mounted rocker switch on a microswitch, which provides a potential-free changeover contact at its outputs.

Furthermore, from the DE 100 01 667 C1 a multi-pole surge arrester for use in low-voltage power supply systems previously known comprising a single substantially U-shaped base with terminals in the body for the active lines and PE or ground potential, wherein in the cover of the base guide means for releasably receiving contactable with the terminals electrically Plug-in parts are provided with Varistor- or spark gap elements.

In an embodiment of the teaching DE 100 01 667 C1 is provided in the base support of the base part a recess for receiving a micro-button for a telecommunications display. For the telecommunication display, a longitudinally extending or horizontally extending slot is further provided in the base support and arranged in the slot a continuous planar rocker switch. The rocker switch is in operative connection with the aforementioned micro-probe. The base support comprises in the region of each protective element to be inserted a transversely or vertically extending opening with access to the rocker switch. In each case a rocker actuating part is inserted into the openings, the vertically projecting cam engages in an associated opening in the cover and interacts with a release pin for monitoring the function in the respective protective element. The rocker actuation parts have a rocker cam directed to further cams and a molded pin for leading receiving a helical compression spring, which is supported against the rocker switch.

With Help the rocker switch and the rocker actuation parts can Functions of the inserted protective elements monitored with a single micro button including a placement control possible is.

The above-described solutions need So each one rocker switch, being over a rotary motion a microswitch is actuated. Not because of avoiding tolerances and forming tolerance chains that are resulting from the individual elements is the end point of the microswitch problematic adjustable, so that the risk of a faulty triggering consists. The required rotational movements come next to the tolerances aggravating still the function-related bearing clearance of the rotation axis added. About that addition are in the solutions the prior art both in the base part and in the plug-in parts Spring accumulator as force elements required to achieve the desired mechanical movements to trigger of the microswitch to effect.

To the State of the art belong still overvoltage protection devices with varistors, where the thermal monitoring function via coupled Thermal fuses is realized. Take the thermal fuses the same temperature as the varistors and interrupt when exceeded a limit the circuit. This interruption may occur via electrical, optical and / or acoustic functional modules to a higher-level control center be reported.

adversely is with these solutions the lack of leakage current, since constantly a low operating current needed for display and in addition one another assembly, e.g. a relay to provide a potential-free Changeover contact is necessary, which then also causes a power consumption.

From the foregoing, it is therefore an object of the invention to provide a further developed pluggable surge arrester and a base part for mechanical or electrical recording of such arresters, which or which enables safe triggering of a telecommunications contact for error signaling, which is to be effected by a novel construction, which assumed by fixed tolerance chains, so that a faulty triggering preferably used microswitches are avoided as a telecommunications contact can.

The solution The object of the invention with respect to the pluggable surge arrester with the feature combination according to claim 1 and in terms the base part with the feature combination according to claim 9, the dependent claims at least expedient embodiments and further developments of the inventive concept include.

Of the The basic idea of the invention lies in a construction which is disadvantageous Rocking movements avoided and only on sliding movements, oriented perpendicular to the plug-in direction of the arrester.

With This construction is a transformation of the electrical information over the Condition of the monitored Elements in a mechanical movement in a particularly störunempfindliche way and way accomplished. As an operation for the release can thermal quantities, e.g. when using a Lotstelle, but also current values, e.g. when using overcurrent-sensitive elements, like fuses, are used.

The Construction of the overall device is particularly robust and nevertheless production optimal. The combination of the individual signals at multi-pole arrangements take place as logical OR connection.

outgoing of known pluggable surge arresters with a or more overvoltage protection elements, which in a structural unit with an optical defect indicator are arranged, as well as with a thermal overcurrent protection device, this comprising a mechanical actuator for triggering a Telecommunication contact for error signaling according to the invention is a transverse provided for the direction of insertion of the arrester movable, linearly guided slide, which has a resilient tongue as a barrier.

The free end of the elastic tongue is of a locking element blocked. The thermal overcurrent protection device comprises an actuating bolt, which in the case of triggering acting on the free end of the tongue to this from the blocking position to move out.

Of the movable slide has a free, web-shaped portion, which a related opening in the arrester penetrates.

If the actuating bolt acting on the free end of the tongue, the slider is released and can be a longitudinal displacement To run.

Prefers is the pivoting direction of the free end of the tongue perpendicular to Direction of movement of the slider running selected.

Farther owns the arrester housing a guide groove for the Slide to ensure its safe movement without jamming.

In Preferred embodiment has the thermal overcurrent protection device a cylindrical shape with an integrated, spring-loaded actuating impact bolt.

The Pivoting direction of the free end of the tongue and the direction of the Movement of the actuating strike pin the thermal overcurrent protection device lie on an axis, i. the two directions essentially fall together.

Ausgestaltend the slider has a bend with a display surface for Defect indicator on.

The display area of the slider may include a color mark or be colored through, wherein a cap to cover the surge arrester on its top a viewing window as part of the optical defect indicator includes.

These Cap is part of the housing the surge arrester and includes a side wall that secures the slider against lateral movement and therefore an extra guide causes.

The Base part for mechanical and electrical recording at least a pluggable surge arrester the type of the invention has a U shape on and is equipped with a switching device for potential-free remote signaling of error conditions equipped. This telecommunication device is preferably a micro-probe.

At an inner surface a leg of the base part is provided a breakthrough, wherein a spring-biased, move-movable probe element in the breakthrough is located. The free Tastende of the probe occurs when inserted surge arrester with the free web-shaped Section of the slide in operative connection and it transmits the spring biasing force on the slide, being in the case of triggering the overcurrent protection device the spring-biased probe element by the no longer blocked Slider is released. As a result, the feeler element performs a movement perpendicular to the plug-in direction of the surge arrester out.

The direction of movement of the probe element and that of the slider coincide with regard to the chain of effects described above.

in the Base part is arranged a push bar, which is a movement run perpendicular to the probe element can, wherein the push rod by means of a spring element in a Target position is pressed.

Farther can the one or more touch elements over Sloping surfaces the Move the push rod out of its desired position to the switching device actuate.

The Push rod or an arrangement of several push rods is space-saving arranged in the upper part of one of the U-shaped legs.

Out the above explanation it follows that only in the base part springs for generating the spring preload of the displacement-movable Tastelemente are necessary.

Of the Slider in pluggable surge arrester Adjust of the functional or fault state of the arrester variable Blocking part, which is then released when an error condition occurred. Of course it is Here also a kinematic reversal conceivable, without the basic principle of the invention to leave.

Ausgestaltend is the pluggable surge arrester or its structural unit consisting of two chambers, with a first, lower chamber an encapsulated spark gap or the like surge arrester receives.

The End faces of the lower chamber are formed by plug contact surfaces, which are each in electrical connection to the spark gap.

Farther is a second, upper chamber formed, which the overcurrent protection device as well picks up the optical defect indicator.

Between lower and upper chamber is a partition located, which a wiring carrier, e.g. picks up a printed circuit board. This circuit board can be application specific e.g. contain a trigger circuit.

The Partition has a groove for guiding the Slider and has the molded locking element.

The lower chamber is from one to the outer contour of the spark gap matched Lockable bottom part.

The upper chamber has two parallel to each other from the partition wall extending side walls, wherein a side wall of a first stop to limit the path of the slider and a return in the partition a second stop to limit the displacement forms.

The Invention will be described below with reference to an embodiment and below With the help of figures closer explained become.

in this connection demonstrate:

1 a partial sectional view of a pluggable surge arrester with recognizable arrangement of the slide and the overcurrent protection device;

2 a representation similar to that after 1 but with the circuit board and overcurrent protection device removed;

3 and 4 Detailed representations analogous to those after 1 with unlocked actuating pin ( 3 ) and in the state of the triggered overcurrent protection device (triggered actuation pin, 4 );

5 a representation, partially broken away, with chain of action slide and probe element;

6 a bottom view of the open base with recognizable push bar and micro button;

7 each plan views of the pluggable surge arrester with optical defect indicator in the state "OK" and "defective";

8th and 9 Representations similar to those after the 5 and 6 , but with the state of the telecommunications contact device "OK";

10 a plan view of a multi-pole arrangement of pluggable surge arresters in a base part, partially broken away, with the state "defective" of the recognizable in the image left arrester and

11 a representation similar to that after 10 , but in the state "in order" and in this respect recognizable position of the push rod and the position of the probe element of the microswitch.

As can be seen from the figurative representations, the triggering of the floating display mechanism takes place via an overcurrent protection device with firing pin, which is assigned to the trigger circuit in the example shown.

This overcurrent protection device protects with firing pin the respective module against inadmissible Operating conditions, e.g. inadmissible high operating voltage and overloads, i.e. Impulse current loads outside maximum border areas by interrupting the trigger or monitoring path and the signaling is initiated.

The Movement of the firing pin realizes the implementation of a electrical process into a mechanical size.

At the Trigger the overcurrent protection device with striker the spring force of the integrated coil spring acts on the leg of the display element, which on the insulating is locked and releases the same.

By the release of the lock indicator, this element is biased by the Spring force of the switching device in the axial direction of the switch emotional. On the one hand, the visual display is in the viewing window at the respective plug-in module itself, i. the display changes from green to red.

To the Others will be the original by this sliding movement of the switch trigger signal of the indicator from the plug-in module into the base part.

in the Base part is this sliding movement of the switch in one, to whose Axis vertical sliding movement converted. implemented This is done by a push bar whose preloaded spring a has less force than the spring of the switch, whereby the Power transmission over two aslant running surfaces he follows.

By the design of the slider, e.g. the angle of the respective slope, can any adjustment of the path-force characteristic of the overall arrangement be achieved.

About the execution this bevels is also a compensation of the existing bearing clearance, i. given Tolerances possible.

The Shifting movement of the slider then gives the pressed microswitch free, at its exits provides the potential-free changeover contact. The operation of the Microswitch also takes place via an oblique to the movement Area.

in the not triggered Condition is the force of the slider, i. the push bar connected spring larger than the force of the microswitch so that it is pressed. The push bar is quasi four-pole in an exemplary case executed, wherein each individual plug-in module alone is capable of the above described Sliding movement in the sense of an OR operation.

Furthermore Trigger of the indicator in the plug-in module can be explained with the aid of Arrangement also the absence of a plug-in module are displayed, because without inserted plug-in part is the microswitch and so that the four-pole slide in the "triggered" state.

The Arrangement according to embodiment has only a small tolerance dependency due to the mechanical signal transmission via a sliding movement or several, coupled such sliding movements.

The Forwarding of the signal via preferably oblique surfaces at the switch or the push bar is tilt-free. The corresponding Materials can have good sliding properties. By the concrete geometry choice and application of certain materials is the switching characteristic adjustable within wide limits.

About the Arrangement of the push rod in a U-shaped leg of the base part results in a space-saving mechanical summary in multipole devices or individual signaling in a single-pole version.

According to the 1 and 2 the pluggable surge arrester comprises a lower chamber 23 and an upper chamber 26 ,

The lower chamber takes in the example an encapsulated spark gap 24 on. Side of the lower chamber are plug contact surfaces 25 provided, the free mating surfaces engage in a complementary plug-in part in the base.

Between lower chamber 23 and upper chamber 26 is a partition 27 located, which is a wiring carrier 28 receives.

The wiring carrier 28 may have a trigger circuit and includes the thermal overcurrent protection device 5 ,

The thermal overcurrent protection device 5 includes an actuating bolt 6 , which in the event of triggering on the free end 3 an elastic tongue 2 too moved.

As a result of this movement of the actuating bolt 6 becomes the free end 3 the tongue 2 on the locking element 4 moved past, so that the pusher 1 can perform a movement across the direction of insertion of the surge arrester.

The slider 1 has a free section 7 on which is formed protruding.

This free section 7 stands out of an opening 8th of the housing 9 of the surge arrester.

In the case 9 or in the partition 27 is still a guide 10 for the slider 1 intended.

About a bend 1 the slider is a display area 11 formed, which has a colored coating or colored.

This display area 11 follows the movement of the slider 1 and leads to a color change in the viewing window 14 (please refer 7 ).

A side wall 13 the cap 12 forms a lateral stop for the slider 1 so that its secure guidance is ensured. It should be noted that the representations after the 1 and 2 respectively. 5 . 8th . 10 and 11 For recognizability of details partially broken housing parts so that the stop action of the side wall 13 the cap 12 not shown here.

The base part 16 to accommodate one or more surge arresters (see 5 or 8th ) has two legs 15 , so that there is a substantially U-shape of the base part.

In an opening of a thigh 15 in the direction of the inserted surge arrester is a probe element 17 which is biased by a spring.

The feeler element 17 has a free tactile 18 , which is in operative connection with the free section 7 of the slider 1 occurs.

Then, if by triggering the thermal overcurrent protection device 5 the free end 3 the tongue 2 from the locking element 4 emerges, moves the probe element 17 over the free probe element 18 the now no longer acting as a fixed stop slide in a direction left according to 8th respectively. 5 , The resulting kinetic energy is transferred to the push bar 19 in the base part 16 transfer. This motion transfer is made by means of inclined surfaces 22 realized, where also inclined surfaces 22 the switching nose of the switching device 21 press in or release.

In the presentation after 10 is the push bar 19 , which with the help of a spring 20 is biased, transferred to such a position that the switching device 21 (Micro button) is released. Thus the error message "defective" can be read out and an exchange of the corresponding pluggable surge arrester can be made.

From the comparison of the representations after the 8th and 9 to the 5 and 6 it can be seen how the position of the probe element 17 during the transition from the display "OK" to the display "defective". In the same sense, the position of the push bar changes 19 ,

The feather 31 for generating the bias of the probe element 17 is in the 5 recognizable.

The lower chamber 23 The pluggable surge arrester is from a bottom part 29 closed, which is essentially the shape of the encapsulated spark gap 24 absorbs or follows this surface shape.

The front side wall 30 The upper chamber of the pluggable surge arrester forms a front (acc 5 and 8th right-sided) stop for the slide 1 and determines its position in the surge arrester state "OK".

Everything in all it succeeds with the presented invention, a telecommunications system for multipolar, but also indicate single-pole overvoltage protection devices, insensitive to manufacturing tolerances, so that a faulty Triggering of preferably used micro-switches to a minimum can be. This is achieved in that no rocking, turning or pivoting movements must be converted into sliding movements.

in the pluggable surge arrester even have to no springs or other, a bias generating elements arranged become. A slider located there serves only as a blocking stop, whose blocking function is then canceled if a thermal overcurrent protection device triggered Has.

1

pusher

2

elastic tongue

3

free End of the tongue

4

locking element

5

thermal overcurrent protection device

6

actuating pin

7

free Sections of the slider

8th

Opening in casing

9

casing

10

guide for slides in the case

11

display area

12

cap

13

sidewall the cap

14

window

15

leg of the base part

16

base

17

scanning element

18

free Tasting of the probe element

19

push bar arranged in the base part

20

spring element for push bar

21

Switching means / microprobe

22

sloping surface

23

lower chamber

24

encapsulated Spark gap as a surge arrester

25

Plug contact surface

26

upper chamber

27

partition wall

28

wiring support

29

the bottom part for completion of the lower chamber

30

Sidewalls of the upper chamber

31

feather for probe element for generating a bias voltage

Claims (15)

Plug-in surge arrester with one or more overvoltage protection elements, which are arranged in a structural unit with an optical defect indicator, and with a thermal overcurrent protection device, this comprising a mechanical actuator for triggering a telecommunications contact for error signaling, characterized in that a transversely movable to the plugging direction of the arrester, straight-line slide ( 1 ) is provided, which a resilient tongue ( 2 ), a free end ( 3 ) the tongue ( 2 ) of a locking element ( 4 ), the thermal overcurrent protection device ( 5 ) an actuating bolt ( 6 ), which in the event of triggering on the free end ( 3 ) the tongue ( 2 ) is moved to move it out of the blocking position and the slide ( 1 ), and furthermore the movable slide ( 1 ) a free, web-shaped section ( 7 ) which has an opening ( 8th ) in the arrester housing ( 9 ) penetrates. Surge arrester according to Claim 1, characterized in that the bending direction of the free end ( 3 ) the tongue ( 2 ) perpendicular to the direction of movement of the slider ( 1 ) runs. Surge arrester according to Claim 1 or 2, characterized in that in the arrester housing ( 9 ) a guide groove ( 10 ) is incorporated for the slide. Surge arrester according to one of the preceding claims, characterized in that the thermal overcurrent protection device ( 5 ) has a substantially cylindrical shape and an integrated, spring-biased Betätigungsschlagbolzen ( 6 ). Surge arrester according to Claims 2 and 4, characterized in that the bending direction of the free end ( 3 ) the tongue ( 2 ) and the direction of movement of the actuating striker ( 6 ) coincide. Surge arrester according to one of the preceding claims, characterized in that the slide ( 1 ) a bend with a display surface ( 11 ) has to defect display. Surge arrester according to one of the preceding claims, characterized in that the housing ( 9 ) a cap ( 12 ) whose one side wall ( 13 ) the slider ( 1 ) secures against lateral movement. Surge arrester according to Claims 6 and 7, characterized in that at least the display surface ( 11 ) of the slider comprises a color marking or is dyed through, the cap ( 12 ) at its top a viewing window ( 14 ) as part of the optical defect indicator. Base part for mechanical or electrical recording of at least one plug-in surge arrester according to one of the preceding claims in U-shape and with a switching device for potential-free remote signaling of fault conditions, in particular a micro-probe, characterized in that on an inner surface of a leg ( 15 ) of the base part ( 16 ) a breakthrough is provided, wherein in the breakthrough a spring-biased, move-movable feeler element ( 17 ) is located, the free Tastende ( 18 ) with the surge arrester used with the free, web-shaped section ( 7 ) of the slider ( 1 ) comes into operative connection and the spring biasing force on the slide ( 1 ), whereby in the event of tripping the overcurrent protection device ( 5 ) the spring-biased feeler element ( 17 ) is released by the slider is no longer blocked, whereby the probe element performs a movement perpendicular to the plugging direction of the surge arrester. Base part according to claim 9, characterized in that the direction of movement of the probe element ( 17 ) and that of the slider ( 1 ) coincide. Base part according to claim 9 or 10, characterized in that in the base part a push rod ( 19 ) is arranged, which a movement senk right to the probe element ( 17 ), whereby the push bar ( 19 ) by means of a spring element ( 20 ) is pressed into a desired position, further the one or more sensing elements ( 17 ) over inclined surfaces ( 22 ) the push bar ( 19 ) move out of their desired position to the switching device ( 21 ). Base part according to claim 11, characterized in that the push rod ( 19 ) or an arrangement of several push rods space-saving in the upper part of one of the U-shaped legs ( 15 ) is / are arranged. Surge arrester according to one of claims 1 to 8, characterized in that the structural unit has two chambers, wherein a first, lower chamber ( 23 ) an encapsulated spark gap or similar arrangement ( 24 ) and the end faces of the lower chamber of plug contact surfaces ( 25 ) are formed, which in each case in electrical connection to the spark gap ( 24 ), a second, upper chamber ( 26 ) the overcurrent protective device ( 5 ) and the optical defect indicator, between lower and upper chamber ( 23 . 26 ) a partition wall ( 27 ), which is a wiring carrier ( 28 ), which application-specific contains a trigger circuit and the partition ( 27 ) a groove for guiding the slider ( 1 ) as well as the locking element ( 4 ) owns. Surge arrester according to Claim 13, characterized in that the lower chamber ( 23 ) from one to the outer contour of the spark gap ( 24 ) adapted bottom part ( 29 ) is closable. Surge arrester according to Claim 13 or 14, characterized in that the upper chamber ( 26 ) two of the partition ( 27 ) extending parallel side walls ( 30 ), wherein a side wall of a first stop for limiting the path of the slide ( 1 ) and a return in the partition ( 27 ) forms a second stop for Schiebewegbegrenzung.