JP3242666U - Harmonic Eliminator for Ferromagnetic Resonance of Instrument Transformer - Google Patents

Abstract

[Problem] To remove the harmonics of ferromagnetic resonance of a potential transformer to avoid the influence of dust intrusion on the wiring, and to avoid the influence on the use of the equipment due to the heat quantity of the internal components becoming too high. Provide equipment. A ferromagnetic resonance harmonic elimination device for a voltage transformer includes a housing, a wiring platform mounted on the top of the housing, a plurality of wiring grooves drilled on the top of the wiring platform, and a wiring groove on the bottom of the housing. A heat dissipating base is installed, a bracket is horizontally mounted inside the housing, a harmonic remover is arranged on the bracket, the inside of the heat dissipating base is hollow, and a plurality of heat dissipating holes are drilled on the side, and the housing is A plurality of openings are formed in the bottom surface of the heat dissipating base, and the bottoms of the openings communicate with the inside of the heat dissipating base. Wiring work can be performed by the wiring platform provided inside, and the wiring points are wired by the dustproof cover. The heat dissipation base enhances the heat dissipation effect of the bottom of the device. [Selection drawing] Fig. 1

Description

The present utility model relates to the technical field of harmonic eliminators, and more particularly to a harmonic eliminator for ferromagnetic resonance of voltage transformers.

Ferromagnetic resonance occurs frequently in power systems, and overvoltages occur during resonance, seriously threatening system safety. Ferromagnetic resonance overvoltages can occur in any system from 3 to 220 kV, and especially in grids below 35 kV, almost all internal overvoltage faults are caused by ferromagnetic resonance. Overvoltages due to ferromagnetic resonance last for a long time and can exist for even longer periods of time. In the case of frequency division resonance, the overvoltage is generally not high, but the current of the PT is large, and it is easy to cause the PT to overheat and explode. , the overvoltage is very high, which often damages the equipment insulation and leads to serious accidents, periodically detecting the open delta voltage (i.e. zero-sequence voltage) of the voltage transformer by the harmonic elimination device, It is a secondary device that effectively eliminates ferromagnetic resonance of various frequencies in instrument transformers.

The patent with publication number CN216489735U discloses a ferromagnetic resonance overvoltage harmonic eliminator in the technical field of voltage harmonic eliminator, which includes a harmonic eliminator body, and is displayed at a central position on the front surface of the harmonic eliminator body. A screen is attached, a control button is attached at a position close to the bottom of the display screen on the front surface of the harmonic eliminator body, and a first telescopic rod and a second telescopic rod are inserted into the harmonic eliminator body. , an adjusting plate is fixedly connected to one outer end of the first telescopic rod and the second telescopic rod.

Although the above technical means can be adapted to scenes with different installation widths, the protection and dust-proof effects during use are both insufficient, and they cannot be effectively protected in different scenes, especially in complex environments such as outdoors. Equipment is susceptible to damage from collisions, and when the equipment is laid down, poor heat dissipation at the bottom often causes internal components to become too hot.

The purpose of this utility model is that both the protection during use and the dust-proof effect mentioned in the above background art are insufficient, and it cannot be effectively protected in different scenes, especially in complex environments such as outdoors. In order to solve the problem that the equipment is easily damaged by collision, and when the equipment is placed, the heat dissipation at the bottom is not sufficient, and the temperature of the internal components is often too high. Another object of the present invention is to provide a device for removing harmonics of ferromagnetic resonance of an instrument.

To achieve the above objectives, the present utility model provides a device for removing harmonics of ferromagnetic resonance of a voltage transformer, comprising a housing, a wiring platform mounted on the top of the housing, and a wiring platform mounted on the top of the wiring platform. A plurality of wiring grooves are drilled, a heat dissipation base is mounted on the bottom of the housing, a bracket is horizontally mounted inside the housing, a harmonic remover is disposed on the bracket, and the inside of the heat dissipation base is hollow. a plurality of heat radiating holes are formed in the side surface, a plurality of openings are formed in the bottom surface of the housing, and the bottom of the openings communicates with the inside of the heat radiating base.

Preferably, a rib is provided outside the top of the wiring platform, one end of the rib is open, a dust cover is slidably provided inside the rib, and the dust cover is slidable inside the rib. be provided.

Preferably, an iron plate is attached to one end of the dust cover, a magnetic attraction plate is attached to one end rib of the top of the wiring platform, and the magnetic attraction plate is magnetically connected to the iron plate.

Preferably, a sponge pad is attached to the bottom of the dust cover, and the sponge pad can cover the upper portion of the wiring groove.

Preferably, the wiring groove is composed of a plurality of wiring holes arranged in order, a screw tube is attached to the bottom of the wiring hole, a conducting wire is connected to the bottom of the screw pipe, and one end of the conducting wire Connected to the remover.

Preferably, a control panel is mounted on the front face of the housing and mounting plates are fixed to the bottom of both sides of the housing.

Preferably, a plurality of springs are attached to both sides of the harmonic rejector, baffles are attached to the outer ends of the springs, and the baffles are attached to the inner wall of the housing.

Preferably, the threaded tube is vertically fixed to the bottom of the wiring groove, a bolt is screwed inside the threaded tube, and the external wiring is inserted into the threaded tube and tightened in the threaded tube by the bolt.

Preferably, a door is hinged to one side of said housing.

Preferably, said bracket is of perforated construction and there is a gap between the bottom and the bottom of the housing.

Compared with the prior art, the beneficial effects of this utility model are as follows.

1. In the instrument transformer ferromagnetic resonance harmonic elimination device, the wiring work can be performed by the wiring platform installed inside, and the wiring point is wired with a dustproof cover to prevent dust from entering and affecting the wiring. avoid giving

2. In the instrument transformer ferromagnetic resonance harmonic elimination device, the heat dissipation base enhances the heat dissipation effect of the bottom of the equipment, and when used for a long time, the heat dissipation of the bottom is insufficient, and the internal components To avoid the heat of the equipment from becoming too high and affecting the use of the equipment.

1 is a schematic diagram of the integrated structure of the present utility model; FIG. It is an internal structure schematic diagram of this utility model. FIG. 2 is a structural schematic diagram of the dustproof cover of the present utility model;

The following clearly and completely describes the technical means in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Examples only, not all implementations. Based on the embodiments of this utility model, all other embodiments obtained by persons skilled in the art without creative labor fall within the protection scope of this utility model.

This utility model provides a ferromagnetic resonance harmonic elimination device for voltage transformer, as shown in FIGS. A plurality of wiring grooves 21 are opened in the top of the housing 1, a heat dissipation base 4 is attached to the bottom of the housing 1 for dissipating heat from the bottom of the equipment, a bracket 12 is horizontally attached inside the housing 1, and the bracket 12 has a high pitch. A harmonic remover 6 for removing waves is arranged, the inside of the heat radiation base 4 has a hollow structure, a plurality of heat radiation holes 41 are formed in the side surface, and a plurality of openings 13 are formed in the bottom surface of the housing 1. The bottom of the opened opening 13 communicates with the inside of the heat dissipation base 4, which is convenient for timely dissipation of heat.

In this embodiment, a rib 23 is provided on the outer side of the top of the wiring platform 2 , one end of the rib 23 is open, and a dustproof cover 5 is slidably provided inside the rib 23 . It is convenient for the dust cover 5 to seal the top of the wiring platform 2 .

Specifically, an iron plate 51 is attached to one end of the dustproof cover 5 , a magnetic attraction plate 22 is attached to one end rib 23 of the top of the wiring platform 2 , and the magnetic attraction plate 22 is magnetically connected to the iron plate 51 . .

Furthermore, a sponge pad 52 is attached to the bottom of the dustproof cover 5, and the sponge pad 52 can cover the upper portion of the wiring groove 21, thereby suppressing the wiring groove 21 from being damaged by abrasion.

Further, the wiring groove 21 is composed of a plurality of wiring holes arranged in order, a screw tube 211 is attached to the bottom of the wiring hole, a conducting wire 212 is connected to the bottom of the screw pipe 211, and one end of the conducting wire 212 It is connected to the wave remover 6 and is convenient for removing harmonics.

In addition, a control panel 3 is mounted on the front surface of the housing 1, and a mounting plate 11 is fixed on the bottom of both sides of the housing 1, which is convenient for mounting and fixing the equipment.

Further, a plurality of springs 61 are attached to both sides of the harmonic remover 6, baffles 62 are attached to the outer ends of the springs 61, the baffles 62 are attached to the inner wall of the housing 1, and the outer side of the harmonic remover 6 to avoid collisions.

Further, the threaded tube 211 is vertically fixed to the bottom of the wiring groove 21, a bolt is screwed inside the threaded tube 211, the external wiring is inserted into the threaded tube 211 and tightened in the threaded tube 211 by the bolt, and the wiring is convenient for

In addition, a door 14 is hinged to one side of the housing 1 for convenient opening of the housing 1 and maintenance of the harmonic remover 6 .

Moreover, the bracket 12 has a perforated structure, and there is a gap between the bottom and the bottom of the housing 1 to ensure that the bottom has a certain space for heat dissipation.

When the device for removing ferromagnetic resonance harmonics of a potential transformer of this utility model is used, first assemble the device, then open the dustproof cover 5, and connect the positive and negative terminals through the wiring groove 21 according to the current direction. When the ferromagnetic resonance overvoltage occurs, the harmonic is removed by the harmonic remover 6. In the process of using the equipment, the heat is dissipated from the bottom heat dissipation base 4, and the internal components work stably. is secured, the harmonic remover 6 is placed inside, a baffle 62 is attached to the outer end of the spring 61, and the baffle 62 is attached to the inner wall of the housing 1, when the device is transported and carried, Thereby, the spring 61 can perform a certain buffering effect, avoiding the outside of the harmonic remover 6 from being hit.

Lastly, what needs to be explained is that in the harmonic remover 6 and the like of this embodiment, the electronic components in the above components are all general standard components or components known to those skilled in the art. and principles are all known to those skilled in the art from technical manuals or from normal experimental methods, and in the empty space of the device, all the above electrical components are respectively connected by wires and concretely A suitable connection method should refer to the operation sequence between the electrical components in the above working principle to complete the electrical connection, which are all well-known techniques in this field.

Above, the basic principles, main features and advantages of the utility model have been shown and explained. It is obvious to a person skilled in the art that the present utility model is not limited to the above examples, and the above examples and description are only preferred embodiments of the present utility model. Without departing from the spirit and scope of this utility model, this utility model may have various changes and improvements, all of which fall within the scope of this claimed utility model. belongs to It is intended that the scope of the claims of this utility model be limited by the following claims and their equivalents.

1, housing 11, mounting plate 12, bracket 13, opening 14, door 2, wiring platform 21, wiring groove 211, screw tube 212, conducting wire 22, magnetic attraction plate 23, rib 3, control panel 4, heat dissipation base 41, Heat radiation hole 5, dust cover 51, iron plate 52, sponge pad 6, harmonic remover 61, spring 62, baffle.

Claims (10)

A device for ferromagnetic resonance harmonic rejection of a potential transformer comprising a housing (1), wherein a wiring platform (2) is mounted on top of said housing (1), and a plurality of A wiring groove (21) is opened, a heat dissipation base (4) is attached to the bottom of the housing (1), a bracket (12) is laterally attached inside the housing (1), and the bracket (12 ), a harmonic remover (6) is placed in the housing (1), the inside of the heat dissipation base (4) has a hollow structure, a plurality of heat dissipation holes (41) are formed on the side surface, and a plurality of heat dissipation holes (41) are formed on the bottom surface of the housing (1). is opened, and the bottom of said opening (13) communicates with the inside of the heat dissipation base (4). A rib (23) is provided outside the top of the wiring platform (2), one end of the rib (23) is open, and a dust cover (5) is slidably provided inside the rib (23), 2. A device for removing ferromagnetic resonance harmonics in a potential transformer according to claim 1, wherein said dust-proof cover (5) is slidably provided inside said rib (23). An iron plate (51) is attached to one end of the dust cover (5), and a magnetic attraction plate (22) is attached to one end rib (23) of the top of the wiring platform (2), and the magnetic attraction plate (22) is magnetically connected to the iron plate (51). A meter according to claim 2, characterized in that a sponge pad (52) is attached to the bottom of said dustproof cover (5), and said sponge pad (52) can cover the upper part of the wiring groove (21). Ferromagnetic Resonance Harmonic Eliminator for Industrial Transformers. The wiring groove (21) is composed of a plurality of wiring holes arranged in order, a screw pipe (211) is attached to the bottom of the wiring hole, and a conducting wire (212) is connected to the bottom of the screw pipe (211). and one end of the lead wire (212) is connected to the harmonic rejector (6). The instrument according to claim 1, characterized in that a control panel (3) is mounted on the front face of the housing (1) and mounting plates (11) are fixed on the bottom of both sides of the housing (1). Transformer Ferromagnetic Resonance Harmonic Eliminator. A plurality of springs (61) are mounted on both sides of the harmonic remover (6), a baffle (62) is mounted on the outer end of the spring (61), and the baffle (62) is inside the housing (1). 2. A device for removing harmonics of ferromagnetic resonance of a potential transformer according to claim 1, wherein said device is attached to a wall. The threaded tube (211) is vertically fixed to the bottom of the wiring groove (21), a bolt is screwed inside the threaded tube (211), and the external wiring is inserted into the threaded tube (211) and screwed by the bolt. 6. A device for removing harmonics of ferromagnetic resonance of a voltage transformer according to claim 5, characterized in that it is clamped in a tube (211). A device for removing harmonics of ferromagnetic resonance of a potential transformer according to claim 1, characterized in that a door (14) is hinged to one side of said housing (1). Ferromagnetic resonance harmonics of voltage transformer according to claim 1, characterized in that said bracket (12) is of perforated structure and there is a gap between the bottom and the bottom of housing (1). wave removal device.

Images