CN204732356U - With the electric switching system of modular construction form - Google Patents

Abstract

The utility model relates to an electric switchgear in the form of a modular structure, in particular to an electric switchgear, especially a motor protection switch, which is provided with a switch contact assembly, a thermal tripper and a magnetic tripper, a cover parts, operating elements, terminal blocks for connecting input conductors and output conductors, wherein the switchgear has a modular construction with: a lower part comprising a switching contact assembly with at least one pole cavity; an intermediate part , the middle piece includes terminal blocks and a magnetic tripper and a thermal tripper; a switch lock assembly, which is fixed at the middle piece and carries operating elements; and a cover, wherein a tripping assembly is provided The trip assembly has an assembly bracket, the magnetic release, the thermal release, the fixed contact bracket and the terminal contact rail are fixed at the assembly bracket, so that the trip assembly is constructed as a stable, prefabricated Complete assembly that can be inserted into the housing of the switchgear.

Description

Electrical switchgear in the form of a modular structure

technical field

The utility model relates to an electric switchgear, especially a motor protection switch, with a switch contact assembly (Schaltkontaktanordnung), a thermal tripper and a magnetic tripper, a cover, an operating element, for connecting an input conductor and an output conductor terminal block (Anschlussklemme).

Background technique

Such an electrical switching device is shown in its entirety, for example, in document DE 199 16 988 A1. A motor protection switch of the type mentioned at the outset is also known from document DE 42 13 729 C2. In this embodiment, a bowl (Napfkärper) open in the direction of the fixed plane is provided, in which the contacts (Kontakststelle) and the arc extinguishing plate are located; here, the fixed contact element ( Kontaktstücke) is fixedly connected to the electrical conductor section (Leiterteilstücke) located on the outside of the bowl bottom. The bowl housing which is open towards the fixing plane is closed by means of a further bowl-shaped housing. The release device is located on the side of the bottom of the bowl opposite to the fixed plane. The axis of rotation on which the lever is mounted is guided at the bottom of the bowl by means of a bracket with supporting legs, with which the movable contact element can be actuated; the bracket has a plate on which the switch lock (Schaltschlo?) is mounted . Assembly is complicated for this arrangement. First the contacts and the arc extinguishing plate must be fitted; then the area is closed and the whole unit has to be rotated by 180° before other components can be fitted. An electrical protective switch is already known from document EP 0 501 844 B1, in which a thermal release and a magnetic release form a thermomagnetic (magnetothermisch) subunit and are arranged on a base made of insulating material. A lever is also articulated on the subunit, with which the movable contact element is brought into the disconnected position. In addition, terminals are arranged on the thermal release and the magnetic release, wherein the thermal release is attached to a carrier plate made of electrically conductive material which is guided in a base made of insulating material. The carrier element made of insulating material for the magnetic release is also connected to the carrier made of insulating material. In addition, arc guide rails with fixed contact elements are anchored at the bracket made of electrically insulating material, so that the complete unit includes thermal release, magnetic release, terminal block and corresponding contact Arc guides for components. The part made of insulating material has lateral webs, which can be inserted into the housing from the narrow side in grooves in the housing.

Utility model content

In view of the prior art, the object of the present invention is to further improve the known switching device with regard to its ease of assembly and its functional safety as well as its ease of operation.

According to the invention, the object of the invention is achieved by a switching device having a modular structure with: a lower part comprising a switching contact assembly with at least one pole cavity; an intermediate part, It comprises a terminal block and a magnetic trip unit as well as a thermal trip unit; a switch lock assembly, which is fixed at the middle part and carries the operating elements; and a cover, in which the trip assembly is arranged, which has an assembly holder, The magnetic trip unit, the thermal trip unit, the fixed contact carrier and the contact rail of the terminal block are fastened to the unit carrier so that the trip unit is constructed as a stable, prefabricated complete unit which can be inserted into the housing of the switchgear pieces.

According to an advantageous embodiment of the invention, the middle part carries a screw thread (Schraubgewinde) and the lower part carries an insertion opening oriented towards the screw thread for inserting a threaded screw (Gewindeschraube), so that the middle part can be connected to the lower part Connect together with a screw joint. This makes it possible to easily assemble devices with increased stability which are suitable for higher rated current strengths.

According to an advantageous embodiment of the invention, the switch lock assembly is fastened on the intermediate part by means of fastening screws. This ensures a secure connection with good assembly possibilities.

According to an advantageous embodiment of the invention, the intermediate part carries wall projections on its narrow sides, which protrude beyond the area of the connection terminals and thus cause air gaps and creepage distances to be adjusted. increase.

According to an advantageous embodiment of the invention, the cover cap has wall projections on its narrow sides, which protrude beyond the area of the connection terminals and thus lead to an increase in the air gap and the creepage distance.

According to an advantageous embodiment of the invention, the switching contact assembly includes a contact bridge and, for actuating the contact bridge, a slide with a striker guided in such a way that it can slide.

According to an advantageous embodiment of the invention, the switch contact assembly comprises: at least one guide plate with blowing plates (Blasblech) molded laterally on the guide plate; is the arc extinguishing chamber) with a lateral groove into which the blower plate is pushed.

Further advantageous refinements and developments of the invention as well as further advantages can be derived from the subclaims.

Description of drawings

The figures and descriptions are used to better understand the objects. Substantially identical or similar objects or parts of objects may be provided with the same reference numerals. Accompanying drawing is only the schematic diagram of the embodiment of the utility model.

in:

Figure 1 shows a view of a motor protection switch according to the present invention in the form of an exploded view,

Figure 2 shows an exploded view of the lower part,

Figure 3 shows an exploded view of the middleware, and

Figure 4 shows an exploded view of the switch lock.

Identical or similar components or components are provided with the same reference numerals in the figures.

List of reference numerals

1 lower part

2 middleware

3 switch lock

4 threaded screws (Gewindeformschraube)

5 Rotary handle spring

6 rotary handle sliders

7 rotating handle

8 covers

9 Nameplate cover (Beschriftungsschild)

10 sliding slats (Schieberleiste)

11 Phase failure lever (Phasenausfallhebel)

12 Openings for snap-on attachments

13 terminal cover

15 Threaded Screws

16 Wall protrusion at middle piece

18 Wall protrusion at cover hood

19 supports

56 threaded holes

57 clamping screw

58 terminal cover

101 Cover lower part

102 fixed spring

102' fixed spring

103 guide plate

104 contact pressure spring

105 terminal frame

106 touch bridge

107 arc suppression plate stack

108 arc suppression cover

109 slider, push rod

110 crash pin

112 blowing board

113 switch cavity assembly

201 middleware bracket

213 Magnetic Lever, Outer Section

214 Magnetic Lever, Internal Section

215 storage spring

216 steering lever

217 clamping screw (Klemmschraube) (combination screw)

218 fixed contact assembly

219 fixed contact bracket

220 U-shaped components

221 thermal magnetic trip assembly

222 manipulation protrusion

223 Magnetic Lever

224 trip lever

225 Protrusion of steering lever

301 switch lock bracket

302 lock spring

302' column spring

303 trip lever

304 trip lever spring

305 trip shaft (Achse Trip)

306 trip lock (Ausl?seklinke)

306' Corner of Trip Latch

307 Locking Hand (Klinkenhand)

308 sliding hand piece (Schieberhand)

309 Clamp (Bügel)

310 locking piece (Klinke)

311 plate (Lasche)

312 switch lock parts

313 bearing pillow (Lagerklotz)

314 compensation bimetallic

315 adjustment knob

316 compensation bimetal bracket

317 trip slider

318 trip slider spring

319 lever spring

320 leverage

321 support spring

322 one end of the locking lever

324 first end of plate

2nd end of 325 plate

326 guide channels

327 observation window

500 assembly bracket

600 terminal block contact rail

900 coil body

1000 coils

1100 yoke

1110 foundation outriggers

1120 First Edge Outrigger

1130 second edge outrigger

1140 fork legs

1150 fork outriggers

1200 movable armature

1210 pressing plate

1220 ribs

1300 fixed core

1400 limit spring (Fesselfeder)

1500 terminal frame

1600 fixed contact elements

2000 Electromagnetic quick release

3000 thermal trip unit

4000 fixed contact bracket

4100 first fixed outrigger

4200 second level outriggers

4300 U-shaped bend

4400 arc guide rail

4500 fixed sheet (Befestigungsfahne)

4700 contact beak (Kontaktzinken)

5100 first bracket outrigger

5200 second support leg

5300 Hold Bridge Section

5400 hold bridging section

7000 strips made of thermal bimetal

8000 heat conductor

9100 Centralware

9200 head parts

9400 holding arm

9500 long outriggers

9600 short outriggers

9700 alignment pin.

Detailed ways

A motor protective switch similar to the motor protective switch described here is known from document DE 100 02 773 A1; this document shall therefore be included in the disclosure content of the present invention with regard to the function and basic internal structure of the motor protective switch.

FIG. 1 shows a view of a motor protection switch according to the present invention in an exploded view. The motor protection switch is assembled from only four prefabricated components, namely the lower part 1 including the switch contact assembly, the middle part 2 including the terminal block and the magnetic release and the thermal release, by means of four The threaded screw 4 is screwed together with the middle piece 2 and includes a switch lock assembly 3 of a mechanical switch lock for manually cutting off, resetting and closing contacts, and a cover cover 8 .

The switch lock comprises a vertical axis of rotation on which the rotary handle 7 is fixed. The rotary handle 7 can be rotated from the off position into the on position. In the case of tripping by means of a magnetic or thermal trip, the rotary handle 7 is held between the on position and the off position in a manner held by the trip shaft 305 (see also FIG. 4 ). In the buckled position, the tripping shaft 305 is part of the switching mechanism and is pushed out of the switching mechanism upwards into the rotary handle 7 in the tripped state. The rotary handle 7 includes a rotary handle slide 6 , with which the rotary handle can be locked in its off position and can be lead-sealed so that undesired reconnection can be prevented. The rotary handle 7 is prestressed in the direction of its disconnected position by means of the rotary handle spring 5 .

In addition, a switch lock similar to the switch lock described here is already known from the document DE 101 39 917 A1; therefore this document should be included in the disclosure content of the present utility model with respect to the function and internal structure of the switch lock 3.

From the documents DE 202 14 578 U1 and DE 10 2009 048 933 A1, a rotary handle similar to the rotary handle described here and its interaction with a switch lock similar to the switch lock described here are already known; therefore these Documentation regarding the function and internal structure of the rotary handle and its interaction with the switch lock 3 shall be included in the disclosure content of the utility model.

A plurality of recesses or openings 12 are provided at different points on the wide side walls of the middle part 2 , on the narrow and wide side walls of the lower part 1 and on the narrow and wide side walls of the cover 8 . The recesses or openings 12 are used for snap-in attachments, such as auxiliary switching devices or low-voltage releases or the like, which are provided with corresponding snap-in hooks for snapping into the openings 12 .

A sliding bar 10 with a phase failure lever 11 is placed on the switching mechanism and ensures that the device remains in good condition even if one phase fails (ausfallen) and the current only still flows through two of the three pole current paths (polstrompfade). run.

A nameplate cover 9 is mounted at the front side of the cover hood 8 .

The lower part 1 includes pole chambers for each pole current path. In the motor circuit breaker shown, there are three pole current paths and thus three pole cavities. In the lower part 1 (see FIG. 2 ), three pole chambers are separated by intermediate walls in a housing 101 made of insulating material. In each of the pole chambers there is a guide plate 103 and at its outer ends there is respectively an arc chamber with an arc extinguishing plate stack 107 , the arc extinguishing plates of which are held by arc extinguishing covers 108 . The guide plate 103 is embodied with an angled middle part and carries a vertically upwardly bent blowing plate 112 laterally on the longitudinal side.

The opening or closing of the switching contacts in each pole cavity takes place via the contact bridge 106, which carries two movable contact elements and will move when the contacts are closed due to the return force of the contact pressure spring 104 The contact elements press against two fixed contact elements (not shown). The contact bridge 106 with the contact springs 104 ′ is inserted into the switch chamber assembly 113 from above. The guide plate 103 is likewise mounted on the switching chamber assembly 113 from below by virtue of the blower plate 112 being introduced into a corresponding receiving groove in the side wall of the switching chamber assembly 113 . The completed assembled switch cavity assembly 113 is then inserted into the pole cavity of the lower part. From document DE 10 2007 054 426 A1, also known switch chamber and guide rail similar to the switch chamber and guide rail described here; in the public content.

To switch off the switching contact, the plunger is pressed from above onto the contact bridge 106 and pushes the contact bridge away from the fixed contact element against the restoring force of the contact pressure spring. The pushrod for the actuation of the contact bridge is designed here as a slide 109 with a striker 110 guided therein so as to be slidable, also referred to as a two-part pushrod. From the document DE 10 2006 055 007 A1, this embodiment of the slider is already known; therefore this document should be included in the disclosure content of the present utility model in terms of the function and structure of the two-part push rod.

Any switching arcs that may arise in this case move into the quenching chamber, where the switching arc is extinguished. the

At the outer side of the lower part of the housing 101 there are fastening means for fastening the motor protective switch on a standard profile carrying rail, for example a hat carrying rail. The fixing device comprises a fixed lug and a movable lug, which is pressed against the hat-shaped carrying rail by means of two fixing springs 102, 102'.

In addition, from the document EP 1 073 084 B1, a switch contact assembly similar to the switch contact assembly described here is already known; therefore this document should be included in the function and internal structure of the switch contact assembly. in the public content.

The middle part 2 is connected to the lower part 1 by means of a screw joint, for which four threaded screws 15 are used. This imparts greater stability to the structure, which is required at high rated currents and thus at higher forces that occur.

The intermediate part 2 carries wall projections 16 on its narrow sides, which protrude beyond the area of the connection terminals and thus lead to an increase in the air gap and creepage distance. The cover cap 8 also has wall projections 18 on its narrow sides, which protrude beyond the area of the connection terminals and thus lead to an increase in the air gap and creepage distance.

FIG. 3 shows the intermediate piece 2 in an exploded view, as it is used in a protective motor switch. From the document EP 1 073 083 A2 also known middleware similar to the middleware described here; therefore this document should be included in the disclosure content of the present utility model in terms of the function and internal structure of the middleware.

The intermediate part 2 has a shell-shaped intermediate part carrier 201 into which the remaining components and assemblies are inserted.

The stationary contact assembly 218 is pushed in from below at the narrow side on the left (in the view of FIG. 3 ). The stationary contact assembly comprises a stationary contact carrier 219 , on which a U-shaped component 220 is mounted, to which a connecting conductor can be coupled by means of a clamping screw 217 . The connection terminal is designed in a known manner as a frame terminal with a terminal frame 105 and a terminal cover 13 . The terminal cover 13 is configured in an L shape. The terminal cover 13 is movably coupled with the clamping screw 17 with its short legs, and its long legs serve as finger guards to prevent unintentional contact with the voltage-carrying parts of the terminals. The support 19 is pushed into the inner region of the U-shaped component 220 .

The thermal-magnetic trip unit 221 is inserted from below into the shell-shaped intermediate part holder 201 . The structure of the electromagnetic trip assembly is shown in exploded view on the right side of FIG. 3 .

The trip assembly 121 has an electromagnetic quick release 2000 comprising a coil body 900 , a coil 1000 , a yoke 1100 , a movable armature 1200 , a fixed core 1300 and a limit spring 1400 . The trip assembly 121 also has a thermal trip 3000 comprising a strip 7000 made of a thermal bimetal or shape memory alloy and a current-carrying thermal conductor 8000 in thermal contact with the strip 7000 . Furthermore, there is a fixed contact carrier 4000 at the underside of which the fixed contact element 1600 is mounted. An assembly bracket 500 made of insulating material is provided, and the electromagnetic quick release 2000, thermal release 3000, fixed contact bracket 4000 and terminal contact rail 600 are fixed on the assembly bracket 500, thereby tripping the assembly Part 221 is designed as a stable, prefabricated complete assembly that can be inserted into the housing of the switching device. In the middle of FIG. 3 the trip unit 221 with the terminal frame 1500 placed on the terminal contact rail 600 is shown.

The stationary contact holder 4000 has a substantially L-shaped shape with a first vertical leg 4100 and a second horizontal leg 4200 . The second leg 4200 has at its free end a U-shaped bend 4300 which transitions at its free end parallel to the second leg 4200 and at a first distance from the second leg The arc guide rail 4400 extends in a manner. A fastening tab 4500 for fastening the strap 7000 is formed on the first leg 4100 . The free end of the first leg 4100 is bent to contact the beak 4700 and is configured to protrude perpendicular to the first leg 4100 .

The coil body 900 has a tubular longitudinally extending central part 9100 and a head part 9200 with a receiving cutout (not visible in the figure), which is overlaid on the central part 9100 . An L-shaped holding arm 9400 protruding beyond the head part 9200 is formed on the head part 9200 , the long leg 9500 of which extends parallel to the longitudinal extension of the central part 9100 . The short leg 9600 of the holding arm is designed to extend towards the center axis of the central part 9100 and is formed with a positioning pin (not visible in the figure) protruding towards the head part 9200 .

Fixed core 1300 of electromagnetic quick release 2000 is formed on the end of central part 9100 opposite head part 9200 .

The yoke 1100 is pot-shaped with a longer base leg 1110 , at the two ends of which are respectively first and second shorter edge legs 1120 , 1130 . The central part 9100 of the coil former 900 is arranged in such a way that it runs between the two edge legs 1120 , 1130 and parallel to the base leg 1110 . The first edge leg 1120 is introduced into a receiving cutout in the head part 9200 in order to fix the coil body 900 . The second edge leg 1130 is fork-shaped cut with two fork legs 1140 , 1150 so that the fixed core 1300 is held between the two fork legs 1140 , 1150 .

The movable armature 1200 is configured cylindrically. A pressure plate 1210 protruding perpendicularly to the armature 1200 is fixed at the end of the armature protruding beyond the head part 9200 of the coil body 900 by riveting, welding or gluing the pressure plate 1210 at this end, for example. department. When the trip assembly 121 is installed in the switchgear, the press plate 1210 acts as a coupling for coupling the movement of the armature 1200 to the trip member of the switchgear. When the armature 1200 is inserted into the coil body 900 , the limit spring 1400 is supported between the head part 9200 and the pressing plate 1210 . The limit spring 1400 is a simple cylindrical helical pressure spring. The press plate 1210 has ribs 1220 for rigidity and openings (not visible in the figure) for engaging dowel pins at the short legs 9600 .

The assembly stand 500 has a substantially L-shaped base shape with a shorter first stand leg 5100 and a longer second stand leg 5200 . A first holding device for fixing the first leg 4100 of the fixed contact carrier 4000 is formed on the first carrier leg 5100 . A second holding device for fastening the terminal contact rail 600 is formed on the first support leg 5100 . A third holding device for fastening the yoke 1100 and thus the electromagnetic quick release 2000 is formed on the second support leg 5200 .

The third holding device is substantially formed with two parallel holding bridges 5300 , 5400 spaced apart from one another, which surround the base leg 111 of the yoke 11 in an at least partially clamping manner.

The terminal frame 1500 carries at its upper narrow side threaded holes 56 for receiving clamping screws 57 . An L-shaped terminal cover 58 for finger protection is movably and entrainedly coupled to the clamping screw 57 .

When the armature 1200 is pulled into the coil 1000 when there is a short circuit, the pressing plate 1210 then presses onto the actuating projection 222 at the magnetic lever 223 , thereby causing the magnetic lever 223 to swing and act on the coil 1000 with the release projection 224 on the trip lever of the switch mechanism to unlock it. The magnetic lever 223 is embodied as a two-part lever with an inner part 214 and an outer part 213 . The magnetic lever is described in the document DE 10 2008 009 198 A1, which should therefore be included in the disclosure content of the present invention with regard to the two-part magnetic lever 223 and its function in the motor protective switch. The magnetic lever 223 is supported in a recess in the side wall or the middle wall of the middle piece carrier 201 .

An approximately L-shaped deflection lever 216 is pivotably mounted in a further recess in a side wall or an intermediate wall of the middle part carrier 201 . The steering lever 215 is pretensioned in a clockwise direction of rotation by two stored force springs 215 . When the force of the stored force spring is released, the steering lever 216 is pressed with the projection 225 onto the push rod 109 . A steering lever similar to the steering lever described here has also been known from document DE 202 14 578 U1; this document should therefore be included in the disclosure of the utility model in terms of the function of the steering lever.

FIG. 4 shows the switch lock 3 in an exploded view. The switch lock largely corresponds to the embodiment described in document DE 101 39 917 A1, which is therefore to be included in the disclosure content of the invention with regard to the structure and function of the switch lock.

The switch lock 3 has a switch lock support 301 , also called a switch lock lower part, which has a receiving cavity in which the switch lock upper part 312 is accommodated.

The switch lock 3 has a first lever or trip lock 306 which has an approximately banana-shaped design and is mounted rotatably at its one end 322 in the switch lock carrier. The other end of the trip latch 306 is hingedly connected via a hinge with a hinge pin at the trip latch 306 to a second lever or latch hand 307 which partially covers the trip latch. There is a first lug on the locking finger, which forms part of the locking point. The other end of the locking finger 307 is connected in a rotatably mounted manner to an approximately U-shaped control lever, also called sliding finger 308 . The other end of the sliding hand 308 is pressed by the lock spring 302 against a protrusion in the switch lock bracket. The locking finger 307 and the tripping lock 306 run approximately parallel to each other. On the side of the trip lock 306 opposite the first lug, a support lug is formed, which bears against a support surface of the rotatably mounted trip lever 303 . The tripping lever 303 has an area of action on which a thermal tripping element or a magnetic tripping element, i.e. for example a tripping end of a bimetallic plate or a tripping projection of a magnetic lever, can act and then cause the tripping lever 303 to move forward. The clock swings. The trip lever 303 is loaded counterclockwise by a trip lever spring 304 in the form of a double-helical torsion spring, so that the trip lever can be moved back into its initial position after tripping has ended.

The switch lock has a third lever, also referred to as locking element 310 , which is bent in an approximately L-shape and whose first leg is rotatably mounted on the side of the switch lock carrier diametrically opposite to the release lever 303 . The first leg runs approximately parallel to the trip lock 306 and the lock finger 307 . A second leg is attached perpendicular to the first leg, the free end of which forms a support surface for the locking lug on the locking finger 307 . The support surface on the locking element 310 and the lug on the locking finger 307 thus form the locking point.

An elbow lever assembly with a plate 311 and a U-shaped clip 309 is articulated approximately in the center of the second leg of the latch 310 . The clip 309 is here articulated with its one leg to the second leg of the closure part 310 and is articulated with its other leg to the plate 311 at its first end 324 .

The lock spring 302 acts on the first leg of the latch 310, which lock spring 302 will pivot the latch 310 clockwise and thus hold the plate 311 and the clip 309 in the first stable position in the latched position. middle.

In the unlocked position, the second end 325 of the plate 311 is moved in the guide channel 326 in the switch lock bracket and is thus guided in a direction that is approximately parallel to the first leg of the locking element 310 Leading to the second leg of the latch 310 . At the hinge point of the plate 311 , the longer leg of the U-shaped clip 309 passes through the existing opening and protrudes upwards in the direction of the rotary handle 7 out of the switching mechanism. The shorter leg of the clip 309 passes through the aperture of the latch 310 in the middle of the second leg. The units (ie the plate 311 , the clip 309 and the closure 310 ) form an elbow joint. The longer part of the clip 309 engages in a slot on the rotary handle 7 and thus converts the rotary motion of the rotary handle 7 or the rotary motion of the rotary handle 7 by straightening the elbow joint The moving motion of the sheet 311 is formed. The steering lever of the trip assembly engages in the opening of the plate 311 at the side 325 and rotates thereby. This means that when the toggle lever assembly is switched on again by turning the rotary handle, it is brought into its switched-on position again. When tripping, the toggle lever is released by unlocking the first locking stage (tripping lever 303 with tripping latch) and the second locking stage (blocking piece with locking hand), and the tripping The turning lever of the assembly presses the plate 311 into the starting position. The rotary handle 7 is brought into the tripped position by the rotary handle spring 5, see description below.

Furthermore, in the switch lock carrier 301 there is a pin, also referred to as trip shaft 305 , which is biased upwards out of the switch mechanism by means of a cylindrical spring 302 ′. The tripping shaft 305 cooperates with the rotary handle during short-circuit or overcurrent tripping as follows: In the switched-on state, the tripping shaft is held back by the corner 306 ′ of the tripping lock 306 . In the tripped situation, the trip latch 306 swings clockwise and releases the trip shaft 305, which is then pressed upwards and engages a retaining structure in the rotary handle 7, whereby the rotary handle 7 is fixed in the on position In the intermediate position between and the disconnected position, this position is also called the tripped position. When disconnecting manually from the tripped position of the rotary handle (also referred to as resetting), the trip shaft 305 is pressed down again and is again held fixed by the trip latch 306 . This mechanism is also described in document DE 10 2009 048 933 A1, which document should therefore be included in the disclosure content of the present invention with respect to the reset function.

In the switch locking part 312 there is a trip slide 317 laterally, which is acted upon by a trip slide spring 318 towards the signaling position, ie on the edge facing the edge side of the switch lock part. In the on, off state and during thermal tripping, the trip slide is pressed in and held in the pressed position against the restoring force of the trip slide spring. This is achieved by a lever at the magnetic lever of the trip assembly. Only in the case of magnetic short-circuit current tripping, the electromagnetic release is caused by the rotation of the magnetic lever of the trip assembly, the return force of the trip slide spring is released and the trip slide can be moved to the left, i.e. outward . The trip slide then enters the region of the viewing window 327 in the cover, see FIG. 1 . The trip slide carries a colored plate at its free end, which is then visible from the outside in a viewing window and optically shows that magnetic tripping has occurred. A similar mechanism is also described in document DE 10 2006 057 648 A1, so this document should be included in the disclosure content of the present utility model.

Finally, at the upper side of the switch lock part 312 adjustment means are mounted for adjustment of the thermal trip system. The adjustment device includes a compensation bimetal 314 , a bearing pillow 313 , a compensation bimetal bracket 316 , an adjustment knob 315 and a supporting spring 321 . An adjustment device similar to the one used here is also described in document DE 101 39 917 A1, so this document should be included in the disclosure of the present invention with respect to the adjustment device and its function.

Claims (7)

1. an electric switching system, motor protection switch in particular, with switch contact assembly, thermal overload release and magnetic release, covering, executive component (7), for connecting the binding post of input conductor and output conductor, wherein said switchgear has modular structure, with: lower component (1), this lower component comprises the described switch contact assembly with at least one chamber, pole; Middleware (2), this middleware comprises described binding post and described magnetic release and described thermal overload release; Switch lock sub-assembly (3), this switch lock sub-assembly is fixed on described middleware (2) place and is loaded with described executive component (7); And cover (8), wherein, be provided with dropout sub-assembly (121), this dropout sub-assembly has sub-assembly support (500), described magnetic release (2000), described thermal overload release (3000), fixed contact support (4000) and binding post contact track (6000) are fixed on described sub-assembly support (500) place, thus described dropout sub-assembly (121) is configured to stable, the prefabricated complete package inserted in the housing of described switchgear.

2. electric switching system according to claim 1, it is characterized in that, described middleware (2) is loaded with screw thread and described lower component (1) is loaded with towards the interspersed opening of described screw thread orientation for interspersed threaded screw (15), thus described middleware (2) can utilize screw engagement to link together with described lower component (1).

3. electric switching system according to claim 2, is characterized in that, described switch lock sub-assembly (3) is fixed on described middleware (2) place by means of hold-down screw.

4. electric switching system according to claim 2, it is characterized in that, described middleware (2) is loaded with wall protuberance (16) at its narrow side place, and this wall protuberance extends over the region of described binding post and causes the increase of air gap and creepage distance thus.

5. electric switching system according to claim 2, it is characterized in that, described cover (8) is loaded with wall protuberance (18) at its narrow side place, and this wall protuberance extends over the region of binding post and causes the increase of air gap and creepage distance thus.

6. electric switching system according to claim 2, it is characterized in that, described switch contact assembly comprises tactile bridge (106) and comprises slide block (109) to handle described tactile bridge (106), this slide block with can be directed slippingly wherein striker (110).

7. electric switching system according to claim 2, is characterized in that, described switch contact assembly comprises: at least one guide plate (103), and this guide plate is with the air blowing plate (112) being laterally molded in this guide plate place; And switch cavity (113), this switch cavity is with the groove of side direction, and described air blowing plate (112) is pushed in described groove.