CN210224770U

CN210224770U - Drawer modular converter group control cabinet

Info

Publication number: CN210224770U
Application number: CN201921374445.0U
Authority: CN
Inventors: Hemin Hu; 胡贺民; Xiaoliang Meng; 孟晓亮
Original assignee: Hebei Chenhao Transmission Equipment Co Ltd
Current assignee: Hebei Chenhao Transmission Equipment Co Ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-03-31
Anticipated expiration: 2029-08-22

Abstract

The utility model relates to the technical field of electrical control auxiliary devices, in particular to a drawer modular frequency converter group control cabinet which can accelerate the air flow speed in a working cavity; the multifunctional cabinet comprises a cabinet body, four groups of supporting legs, a cabinet door, a left guide rail, a right guide rail, a drawer and a frequency converter group body, wherein a working cavity is arranged in the cabinet body, an opening is formed in the central area of the front side wall of the cabinet body, a placing cavity is formed in the drawer, a plurality of groups of through holes are formed in the bottom end of the drawer, and a vent hole is longitudinally formed in the central area of the; still include the barrel, the fan, left connecting plate, right connecting plate, left fixed plate, right fixed plate, left telescopic link, right telescopic link, left spring, right spring, left baffle and right baffle, cabinet body bottom central zone vertically is provided with the mounting hole, left connecting plate left side wall and right connecting plate right side wall central zone are provided with left fixed slot and right fixed slot respectively, left fixed plate and right fixed plate left side wall central zone transversely are provided with left flexible hole and right flexible hole respectively.

Description

Drawer modular converter group control cabinet

Technical Field

The utility model relates to a technical field of electrical control auxiliary device especially relates to a drawer modular converter group switch board.

Background

As is well known, a drawer modular frequency converter group control cabinet is an auxiliary device used in an electrical control system to realize the integration of power distribution and frequency conversion control, and is widely used in the field of electrical control; the existing drawer modular frequency converter group control cabinet comprises a cabinet body, four groups of supporting legs, a cabinet door and a left guide rail, the top ends of four groups of supporting legs are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the cabinet body, a working cavity is arranged in the cabinet body, an opening is formed in the central area of the front side wall of the cabinet body and is communicated with the working cavity, the left end of the cabinet door is connected with the left half area of the front side wall of the cabinet body through a hinge, the left end of the left guide rail and the right end of the right guide rail are respectively connected with the central areas of the left side wall and the right side wall in the cabinet body, the left end and the right end of the drawer are respectively fixed on the left guide rail and the right guide rail in a sliding manner, a placing cavity is arranged in the drawer and is communicated with the top end of the drawer, a plurality of groups of through; when the existing drawer modular frequency converter group control cabinet is used, the drawer can slide back and forth on the left guide rail and the right guide rail, the box door is opened, the frequency converter group body can be pulled out from the working cavity by pulling the drawer forwards, and heat generated in the operation process of the frequency converter group body can be discharged from the vent hole; the control cabinet of the existing drawer modular frequency converter group is found in use, and air in a working cavity is in a static state, so that heat generated by a frequency converter body is difficult to be rapidly discharged to the outside of a cabinet body, and the heat dissipation efficiency is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can accelerate the air flow speed in the work cavity, improve radiating efficiency's drawer modular converter group switch board.

The utility model relates to a drawer modular frequency converter group control cabinet, which comprises a cabinet body, four groups of supporting legs, a cabinet door and a left guide rail, the top ends of four groups of supporting legs are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the cabinet body, a working cavity is arranged in the cabinet body, an opening is formed in the central area of the front side wall of the cabinet body and is communicated with the working cavity, the left end of the cabinet door is connected with the left half area of the front side wall of the cabinet body through a hinge, the left end of the left guide rail and the right end of the right guide rail are respectively connected with the central areas of the left side wall and the right side wall in the cabinet body, the left end and the right end of the drawer are respectively fixed on the left guide rail and the right guide rail in a sliding manner, a placing cavity is arranged in the drawer and is communicated with the top end of the drawer, a plurality of groups of through; the novel cabinet is characterized by further comprising a cylinder body, a fan, a left connecting plate, a right connecting plate, a left fixing plate, a right fixing plate, a left telescopic rod, a right telescopic rod, a left spring, a right spring, a left baffle and a right baffle, wherein a mounting hole is longitudinally formed in the central area of the bottom end of the cabinet body, the top end of the cylinder body penetrates through the mounting hole and is fixedly connected with the inner side wall of the mounting hole, an inner cavity is formed in the cylinder body and is respectively communicated with the top end and the bottom end of the cylinder body, the fan is transversely installed in the inner cavity, the right end of the left connecting plate and the left end of the right connecting plate are respectively connected with the left side wall and the lower half area of the right side wall of the cylinder body, a left fixing groove and a right fixing groove are respectively formed in the central areas of the left side wall of the left connecting plate and the right side wall of the left connecting plate, the left spring left end and the right spring right end are respectively connected with the left baffle right side wall and the right baffle left side wall central region, the left spring right end and the right spring left end are respectively connected with the left fixed plate left side wall and the right fixed plate right side wall central region, and the left telescopic rod left end and the right telescopic rod right end respectively penetrate through the left telescopic hole and the right telescopic hole and are respectively inserted into the left fixed groove and the right fixed groove.

The utility model discloses a drawer modular converter group switch board still includes bottom plate and four group's assembly pulleys, and four group's landing leg bottoms are connected with bottom plate top left front side, right front side, left rear side and right rear side respectively, four group's assembly pulley tops are connected with bottom plate bottom left front side, right front side, left rear side and right rear side respectively, are provided with four group's braking plates on four group's assembly pulleys respectively.

The utility model discloses a drawer modular converter group switch board still includes fixing base, fixed pin, preceding branch, back branch and pull rod, the fixing base right-hand member is connected with cabinet body left side wall first region, and lateral wall central zone is provided with the intercommunicating pore before the fixing base, fixed pin front end and preceding branch back lateral wall first region are connected, and the fixed pin rear end passes the intercommunicating pore and with the preceding first region connection of lateral wall of back branch, preceding branch and back branch bottom respectively with the pull rod top first region and latter half region connection, pull rod lateral wall central zone is provided with the slipmat.

The utility model discloses a drawer modular converter group switch board still includes left subplate, right subplate, left stabilizer bar and right stabilizer bar, left side subplate left end and right subplate right-hand member respectively with cabinet body top left side half regional and right half regional connection, left side subplate right-hand member is connected with right subplate left end, left side stabilizer bar and right stabilizer bar top respectively with left subplate bottom left side half regional and right subplate bottom right half regional connection, left side stabilizer bar and right stabilizer bar bottom respectively with cabinet body top left side half regional and right half regional connection.

The utility model discloses a drawer modular converter group switch board still includes the filter screen, the filter screen is transversely installed in inner chamber second region.

The utility model discloses a drawer modular converter group switch board still includes the dust screen, the dust screen is transversely installed in the ventilation hole.

The utility model discloses a drawer modular converter group switch board still includes the handle, the right half regional connection on lateral wall before handle rear end and the cabinet door.

The utility model discloses a drawer modular converter group switch board, lateral wall central area is provided with the observation hole before the cabinet door to be provided with the transparent plate in observation hole department.

Compared with the prior art, the beneficial effects of the utility model are that: open the chamber door, through pulling the drawer forward, can pull out converter group body from the work intracavity, the heat that converter group body operation in-process produced can be discharged in the ventilation hole, the cabinet body can play the effect of protection to converter group body, left side telescopic link right-hand member and right telescopic link left end insert respectively to left fixed slot and right fixed slot in, can play spacing effect to left connecting plate and right connecting plate through left telescopic link and right telescopic link, because left limiting plate right-hand member and right limiting plate left end are connected with barrel left side wall and right side wall second region respectively, make left telescopic link and right telescopic link can carry out spacingly to the barrel, realize the installation to the barrel, the fan is transversely installed in the inner chamber, the fan is connected with the commercial power electricity, the fan is bloied to the work intracavity, can accelerate the air flow speed in the work intracavity, and the heat dissipation efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the connection of the cabinet body, the cabinet door, the handle and the transparent plate;

FIG. 3 is a schematic left side view of the connection of the fixing base, the fixing pin, the front support rod, the rear support rod, the pull rod and the non-slip mat;

FIG. 4 is an enlarged view of a portion of FIG. 1;

FIG. 5 is a partial enlarged view of B in FIG. 1;

in the drawings, the reference numbers: 1. a cabinet body; 2. a support leg; 3. a cabinet door; 4. a left guide rail; 5. a right guide rail; 6. a drawer; 7. a frequency converter group body; 8. a barrel; 9. a fan; 10. a left connecting plate; 11. a right connecting plate; 12. a left fixing plate; 13. a right fixing plate; 14. a left telescoping rod; 15. a right telescopic rod; 16. a left spring; 17. a right spring; 18. a left baffle; 19. a right baffle; 20. a base plate; 21. a pulley block; 22. a brake plate; 23. a fixed seat; 24. a fixing pin; 25. a front support rod; 26. a rear support rod; 27. a pull rod; 28. a non-slip mat; 29. a left auxiliary plate; 30. a right auxiliary board; 31. a left stabilizer bar; 32. a right stabilizer bar; 33. filtering with a screen; 34. a dust screen; 35. a handle; 36. a transparent plate.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figures 1 to 5, the utility model relates to a drawer modular converter group control cabinet, which comprises a cabinet body 1, four groups of supporting legs 2, a cabinet door 3, a left guide rail 4, a right guide rail 5, a drawer 6 and a converter group body 7, wherein the top ends of the four groups of supporting legs 2 are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the cabinet body 1, a working chamber is arranged inside the cabinet body 1, an opening is arranged in the central area of the front side wall of the cabinet body 1 and communicated with the working chamber, the left end of the cabinet door 3 is connected with the left half area of the front side wall of the cabinet body 1 through a hinge, the left end of the left guide rail 4 and the right end of the right guide rail 5 are respectively connected with the central area of the left side wall and the right side wall of the cabinet body 1, the left end and the right end of the drawer 6 are respectively fixed on the left, a ventilation hole is longitudinally formed in the central area of the top end of the cabinet body 1, and a frequency converter group body 7 is arranged in the central area of the bottom side wall of the drawer 6; the wardrobe also comprises a barrel 8, a fan 9, a left connecting plate 10, a right connecting plate 11, a left fixing plate 12, a right fixing plate 13, a left telescopic rod 14, a right telescopic rod 15, a left spring 16, a right spring 17, a left baffle 18 and a right baffle 19, wherein a mounting hole is longitudinally formed in the central area of the bottom end of the wardrobe body 1, the top end of the barrel 8 penetrates through the mounting hole and is fixedly connected with the inner side wall of the mounting hole, an inner cavity is formed in the barrel 8 and is respectively communicated with the top end and the bottom end of the barrel 8, the fan 9 is transversely installed in the inner cavity, the right end of the left connecting plate 10 and the left end of the right connecting plate 11 are respectively connected with the left side wall and the lower half area of the right side wall of the barrel 8, the central areas of the left side wall of the left connecting plate 10 and the right side wall of the right connecting plate 11 are respectively provided with a left fixing groove and a right fixing groove, the top ends of the left fixing, the left end of a left spring 16 and the right end of a right spring 17 are respectively connected with the central areas of the right side wall of a left baffle 18 and the left side wall of a right baffle 19, the right end of the left spring 16 and the left end of the right spring 17 are respectively connected with the central areas of the left side wall of a left fixed plate 12 and the right side wall of a right fixed plate 13, and the left end of a left telescopic rod 14 and the right end of a right telescopic rod 15 respectively penetrate through a left telescopic hole and a right telescopic hole and are respectively inserted into a left fixed groove and a right fixed; open the chamber door, through pulling the drawer forward, can pull out converter group body from the work intracavity, the heat that converter group body operation in-process produced can be discharged in the ventilation hole, the cabinet body can play the effect of protection to converter group body, left side telescopic link right-hand member and right telescopic link left end insert respectively to left fixed slot and right fixed slot in, can play spacing effect to left connecting plate and right connecting plate through left telescopic link and right telescopic link, because left limiting plate right-hand member and right limiting plate left end are connected with barrel left side wall and right side wall second region respectively, make left telescopic link and right telescopic link can carry out spacingly to the barrel, realize the installation to the barrel, the fan is transversely installed in the inner chamber, the fan is connected with the commercial power electricity, the fan is bloied to the work intracavity, can accelerate the air flow speed in the work intracavity, and the heat dissipation efficiency is improved.

The utility model discloses a drawer modular converter group control cabinet, still include bottom plate 20 and four group's assembly pulley 21, four group's landing leg 2 bottoms are connected with bottom plate 20 top left front side, right front side, left rear side and right rear side respectively, four group's assembly pulley 21 tops are connected with bottom plate 20 bottom left front side, right front side, left rear side and right rear side respectively, four group's assembly pulley 21 are provided with four group's braking plates 22 respectively; the four groups of pulley blocks can facilitate the position of a worker moving the device, and the four groups of pulley blocks can be braked through four groups of brake plates respectively, so that the use flexibility is improved.

The utility model discloses a drawer modular converter group control cabinet, still include fixing base 23, fixed pin 24, front strut 25, back strut 26 and pull rod 27, fixing base 23 right-hand member is connected with the first half region of 1 left side wall of the cabinet body, fixing base 23 front side wall central zone is provided with the intercommunicating pore, the fixed pin 24 front end is connected with the first half region of 25 back side wall of front strut 25, the fixed pin 24 rear end passes the intercommunicating pore and is connected with the first half region of 26 front side wall of back strut, front strut 25 and back strut 26 bottom are connected with the first half region and the second half region of the pull rod 27 top respectively, 27 lateral wall central zone of pull rod is provided with slipmat 28; preceding branch and back branch can use the fixed pin to rotate as the axle simultaneously, and the staff holds the pull rod and removes the device, can make the operation more laborsaving, and the slipmat can protect staff's palm, improves convenience of use and security.

The utility model discloses a drawer modular converter group control cabinet, still include left subplate 29, right subplate 30, left stabilizer bar 31 and right stabilizer bar 32, left subplate 29 left end and right subplate 30 right-hand member are connected with cabinet body 1 top left half region and right half region respectively, left subplate 29 right-hand member is connected with right subplate 30 left end, left stabilizer bar 31 and right stabilizer bar 32 top are connected with left subplate 29 bottom left half region and right subplate 30 bottom right half region respectively, left stabilizer bar 31 and right stabilizer bar 32 bottom are connected with cabinet body 1 top left half region and right half region respectively; when the cabinet body works outdoors, the left auxiliary plate and the right auxiliary plate can prevent rain and snow for the cabinet body, and the left stabilizer bar and the right stabilizer bar can respectively play a supporting role for the left auxiliary plate and the right auxiliary plate, so that the use reliability is improved.

The drawer modular frequency converter group control cabinet of the utility model also comprises a filter screen 33, the filter screen 33 is transversely arranged in the lower half area of the inner cavity; the filter screen can filter the dust in the air that gets into the work intracavity, improves the reliability of using.

The drawer modular frequency converter group control cabinet of the utility model also comprises a dust screen 34, the dust screen 34 is transversely arranged in the ventilation hole; the dust screen can prevent that the dust from entering into the work intracavity from the vent in the course of the work, improves stability in use.

The utility model discloses a drawer modular converter group control cabinet, which also comprises a handle 35, wherein the rear end of the handle 35 is connected with the right half area of the front side wall of the cabinet door 3; the handle can be convenient for open and close the cabinet door, improves the convenience of use.

The utility model discloses a drawer modular converter group control cabinet, the central area of the front side wall of a cabinet door 3 is provided with an observation hole, and a transparent plate 36 is arranged at the observation hole; staff's accessible transparent plate is observed the condition of robbing in the work chamber, improves and uses the controllability.

The utility model discloses a drawer modular converter group control cabinet, it is at work, open the chamber door, through pulling the drawer forward, can pull out the converter group body from the work intracavity, the heat that produces in the operation of converter group body can be discharged from the ventilation hole, the cabinet body can play the effect of protection to the converter group body, left telescopic link right-hand member and right telescopic link left end insert respectively to left fixed slot and right fixed slot, can play the effect of spacing to left connecting plate and right connecting plate through left telescopic link and right telescopic link, because left limiting plate right-hand member and right limiting plate left end are connected with barrel left side wall and right side wall lower half region respectively, make left telescopic link and right telescopic link can carry out the spacing to the barrel, realize the installation to the barrel, the fan is transversely installed in the inner chamber, the fan is connected with the commercial power electricity, the fan blows to the work intracavity, can accelerate the air flow velocity in the work chamber, the heat dissipation efficiency is improved; the four groups of pulley blocks can facilitate the position of a worker moving the device, and the four groups of pulley blocks can be braked by four groups of brake plates respectively, so that the use flexibility is improved; the front supporting rod and the rear supporting rod can rotate by taking the fixing pin as a shaft, a worker holds the pull rod to move the device, the operation can be more labor-saving, the anti-skid pad can protect the palm of the worker, and the use convenience and the safety are improved; when the cabinet body works outdoors, the left auxiliary plate and the right auxiliary plate can prevent rain and snow for the cabinet body, and the left stabilizing rod and the right stabilizing rod can respectively play a role in supporting the left auxiliary plate and the right auxiliary plate, so that the use reliability is improved; the filter screen can filter dust in air entering the working cavity, so that the use reliability is improved; the dust screen can prevent dust from entering the working cavity from the vent in the working process, so that the use stability is improved; the handle can facilitate the opening and closing of the cabinet door, thereby improving the use convenience; staff's accessible transparent plate is observed the condition of robbing in the work chamber, improves and uses the controllability.

The utility model discloses a four group's assembly pulley that drawer modular converter group switch board used are purchase from the market, only need according to the description install use can.

The utility model discloses a drawer modular converter group switch board, above the mounting means, the connected mode or the mode that sets up of all parts are common mechanical system to the concrete structure, model and the coefficient index of its all parts are its from taking the technique, as long as can reach all can implementing of its beneficial effect, so do not add at much and give unnecessary detail.

In the case of the drawer modular converter group control cabinet of the utility model, the directional words contained in the terms of "up, down, left, right, front, back, inside, outside, vertical and horizontal" and the like only represent the direction of the term in the normal use state without being described to the contrary, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the numerical terms "first," "second," and "third," etc. do not denote any particular quantity or order, but rather are used to distinguish one from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A drawer modular frequency converter group control cabinet comprises a cabinet body (1), four groups of supporting legs (2), a cabinet door (3), a left guide rail (4), a right guide rail (5), a drawer (6) and a frequency converter group body (7), wherein the top ends of the four groups of supporting legs (2) are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the cabinet body (1), a working cavity is arranged in the cabinet body (1), an opening is arranged in the central area of the front side wall of the cabinet body (1) and communicated with the working cavity, the left end of the cabinet door (3) is connected with the left half area of the front side wall of the cabinet body (1) through a hinge, the left end of the left guide rail (4) and the right end of the right guide rail (5) are respectively connected with the central area of the inner left side wall and the inner right side wall of the cabinet body (1), the left end and the right end of the drawer (6, the placing cavity is communicated with the top end of the drawer (6), a plurality of groups of through holes are formed in the bottom end of the drawer (6), a ventilation hole is longitudinally formed in the central area of the top end of the cabinet body (1), and the frequency converter group body (7) is installed in the central area of the side wall of the inner bottom of the drawer (6); the novel cabinet is characterized by further comprising a barrel (8), a fan (9), a left connecting plate (10), a right connecting plate (11), a left fixing plate (12), a right fixing plate (13), a left telescopic rod (14), a right telescopic rod (15), a left spring (16), a right spring (17), a left baffle (18) and a right baffle (19), wherein a mounting hole is longitudinally formed in the central area of the bottom end of the cabinet body (1), the top end of the barrel (8) penetrates through the mounting hole and is fixedly connected with the inner side wall of the mounting hole, an inner cavity is formed in the barrel (8), the inner cavity is respectively communicated with the top end and the bottom end of the barrel (8), the fan (9) is transversely installed in the inner cavity, the right end of the left connecting plate (10) and the left end of the right connecting plate (11) are respectively connected with the lower half areas of the left side wall and the right side wall of the barrel (8), a left fixing groove and a right fixing groove are, left side fixed plate (12) and right fixed plate (13) top respectively with the cabinet body (1) bottom left side half regional with half regional connection on the right side, left side fixed plate (12) and right fixed plate (13) left side wall central zone transversely are provided with left flexible hole and right flexible hole respectively, left side spring (16) left end and right spring (17) right-hand member respectively with left baffle (18) right side wall and right baffle (19) left side wall central zone are connected, left side spring (16) right-hand member and right spring (17) left end respectively with left fixed plate (12) left side wall and right fixed plate (13) right side wall central zone are connected, left side telescopic link (14) left end and right telescopic link (15) right-hand member pass left side flexible hole and right flexible hole respectively and insert respectively to left fixed slot and right fixed slot in.

2. The control cabinet of the drawer modular frequency converter group as claimed in claim 1, further comprising a bottom plate (20) and four sets of pulley blocks (21), wherein the bottom ends of the four sets of legs (2) are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the top end of the bottom plate (20), the top ends of the four sets of pulley blocks (21) are respectively connected with the left front side, the right front side, the left rear side and the right rear side of the bottom end of the bottom plate (20), and four sets of brake plates (22) are respectively arranged on the four sets of pulley blocks (21).

3. The control cabinet of the drawer modular frequency converter group as claimed in claim 2, further comprising a fixing seat (23), a fixing pin (24), a front support rod (25), a rear support rod (26) and a pull rod (27), wherein the right end of the fixing seat (23) is connected with the upper half area of the left side wall of the cabinet body (1), a communication hole is formed in the central area of the front side wall of the fixing seat (23), the front end of the fixing pin (24) is connected with the upper half area of the rear side wall of the front support rod (25), the rear end of the fixing pin (24) penetrates through the communication hole and is connected with the upper half area of the front side wall of the rear support rod (26), the bottom ends of the front support rod (25) and the rear support rod (26) are respectively connected with the front half area and the rear half area of the top end of the pull rod.

4. The control cabinet of drawer modular frequency converter set as claimed in claim 3, further comprising a left auxiliary plate (29), a right auxiliary plate (30), a left stabilizer bar (31) and a right stabilizer bar (32), wherein the left end of the left auxiliary plate (29) and the right end of the right auxiliary plate (30) are respectively connected with the left half area and the right half area of the top end of the cabinet body (1), the right end of the left auxiliary plate (29) is connected with the left end of the right auxiliary plate (30), the top ends of the left stabilizer bar (31) and the right stabilizer bar (32) are respectively connected with the left half area of the bottom end of the left auxiliary plate (29) and the right half area of the bottom end of the right auxiliary plate (30), and the bottom ends of the left stabilizer bar (31) and the right stabilizer bar (32) are respectively connected with the left half area and the right half area of the top end of the cabinet body.

5. The control cabinet of a drawer modular frequency converter group according to claim 4, characterized in that it further comprises a sieve (33), said sieve (33) being mounted transversely to the lower half of the internal cavity.

6. The control cabinet of a drawer modular frequency converter set according to claim 5, characterized in that it further comprises a dust screen (34), said dust screen (34) being mounted transversely in the ventilation holes.

7. The control cabinet of drawer modular frequency converter set according to claim 6, characterized in that it further comprises a handle (35), the rear end of the handle (35) is connected with the right half area of the front side wall of the cabinet door (3).

8. The control cabinet of a drawer modular frequency converter group according to claim 7, characterized in that the cabinet door (3) is provided with a viewing aperture in the central area of the front side wall and with a transparent plate (36) at the viewing aperture.