CN210039895U

CN210039895U - Excitation surge current suppression device applied to transformer

Info

Publication number: CN210039895U
Application number: CN201921269146.0U
Authority: CN
Inventors: 蒋卫民
Original assignee: Hunan Huarui Yineng Electric Co Ltd
Current assignee: Hunan Huarui Yineng Electric Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-02-07
Anticipated expiration: 2029-08-06

Abstract

The utility model is suitable for the field of transformers, and provides a device for inhibiting excitation surge current applied to a transformer, which comprises two lower clamping pieces, two upper clamping pieces, a resistance bracket and a plurality of series resistors arranged on the resistance bracket, wherein the resistance bracket comprises an upper fixing strip and a lower fixing strip, the upper fixing strip is screwed on the upper clamping piece, the lower clamping piece is screwed with a plurality of supporting plates upwards, the lower fixing strip is rigidly connected at the upper end of the supporting plates, a plurality of hoops with the same quantity are all clamped on the upper fixing strip and the lower fixing strip, a hoop clamped on the lower fixing strip is correspondingly arranged under the hoop on any upper fixing strip, the upper end and the lower end of the series resistors are respectively arranged in the upper hoop and the lower hoops which are correspondingly arranged, go up the folder top and still be provided with high-pressure vacuum contactor, the utility model provides a device has more the wholeness when installing series resistance, and required installation space still less.

Description

Excitation surge current suppression device applied to transformer

Technical Field

The utility model relates to a transformer field, concretely relates to be applied to suppression excitation surge current device on transformer.

Background

When a transformer is switched on and power is transmitted, an iron core of the transformer can generate various magnetic fluxes, a transformer switching-on always generates excitation inrush current with a large amplitude for a long time, the transformer protection action can be caused, and switching-on failure can be caused, damage to a system and other electric equipment can be caused due to the fact that the excitation inrush current is large, the traditional direct switching-on can not avoid the generation of the excitation inrush current, and a device for restraining the excitation inrush current is added by a manufacturer aiming at the problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be applied to suppression excitation surge device on transformer aims at solving when current transformer installation series resistance and occupies the position comparatively, and the device lacks the problem of wholeness.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize: a device for suppressing excitation surge current applied to a transformer comprises a lower clamping piece fixedly arranged at the front and back sides of the lower side of the transformer, an upper clamping piece fixedly arranged at the front and back sides of the upper side of the transformer, resistance support and install a plurality of series resistance on resistance support, resistance support includes fixed strip and lower fixed strip, it is straight shaft-like and be on a parallel with the horizontal plane setting with lower fixed strip to go up the fixed strip spiro union, it has a plurality of backup pads to go up the intermediate position department at last folder, the folder spiro union makes progress has a plurality of backup pads down, the fixed strip rigid coupling is in the backup pad upper end down, it has a plurality of staple bolts the same quantity to go up equal joint on fixed strip and the lower fixed strip, it all corresponds the staple bolt that is provided with a joint on the fixed strip down to go up under the staple bolt on the fixed strip wantonly, the last lower extreme of series resistance is installed respectively between two staple bolts that correspond the setting from top to bottom, it still is provided with high-pressure vacuum contactor to.

Furthermore, a connecting rod is arranged between the two supporting plates, and two ends of any connecting rod penetrate through the two supporting plates and are connected to a connecting head of the transformer.

Further, the upper clamping piece and the lower clamping piece are in threaded connection through the stud bolts.

Further, all open on last fixed strip and the lower fixed strip and have a plurality of bolt holes and the quantity of bolt hole is more than the quantity of staple bolt.

Furthermore, a base is arranged below the lower clamping piece, and a reinforcing rib is arranged at the connecting part between the lower clamping piece and the base.

The utility model has the advantages that: the device divides voltage by installing a plurality of series resistors at the periphery of the transformer so as to reduce the voltage of a transformer winding and indirectly reduce excitation inrush current; through setting up the resistance support, then install a plurality of series resistance again on the resistance support, this kind of mode is for independently making the shell of series resistance on the market, installs the series resistance in this shell, then is installing the shell the mode on the transformer, and not only the occupation volume is less, can not bring the trouble for the cable arrangement, has more the wholeness moreover.

Drawings

Fig. 1 is a schematic structural diagram of a magnetizing inrush current suppression device applied to a transformer according to the present invention.

In the figure: 10-a transformer; 20-a lower clamp; 30-an upper clamp; 40-a resistive support; 41-fixing strips; 42-lower fixing strip; 43-anchor ear; 50-a support plate; 60-high voltage vacuum contactor; 70-a connecting rod; 80-stud bolts; 90-a base; 100-reinforcing ribs; 110-series resistance.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of protection of the present invention.

As shown in fig. 1, a magnetizing inrush current suppressing device applied to a transformer comprises a lower clamping piece 20 fixedly installed at the front and back sides of the lower side of a transformer 10, an upper clamping piece 30 fixedly installed at the front and back sides of the upper side of the transformer 10, a resistor support 40, and a plurality of series resistors 110 installed on the resistor support 40, wherein the resistor support 40 comprises an upper fixing strip 41 and a lower fixing strip 42, the upper fixing strip 41 and the lower fixing strip 42 are straight rod-shaped and arranged parallel to the horizontal plane, the upper fixing strip 41 is screwed at the middle position of the upper clamping piece 30, the lower clamping piece 20 is screwed with a plurality of support plates 50, the lower fixing strip 42 is rigidly connected to the upper ends of the support plates 50, a plurality of anchor ears 43 with the same number are respectively clamped on the upper fixing strip 41 and the lower fixing strip 42, an anchor ear 43 clamped on the lower fixing strip 42 is correspondingly arranged under the anchor ear 43 on any upper fixing strip 41, the upper and lower ends of the series resistor 110 are respectively installed in the upper and lower two correspondingly arranged hoops 43, the series resistor 110 is removed or fixed by loosening and tightening the two correspondingly arranged hoops 43, and a high-voltage vacuum contactor 60 is further arranged above the upper clamping piece 30 to connect or disconnect the circuit.

Further, a connecting rod 70 is arranged between the two supporting plates 50, and two ends of any connecting rod 70 penetrate through the two supporting plates 50 and are connected to the connecting head of the transformer 10 so as to reinforce the positions of the supporting plates 50, and the supporting plates 50 are just connected into a whole, so that the situation that the lower fixing strip 42 is loosened due to looseness of the supporting plates 50 is avoided.

Further, the upper and

lower clip members

30 and 20 are threadedly coupled to each other by means of the stud bolts 80 to secure the positions of the upper and

lower clip members

30 and 20.

Furthermore, a plurality of bolt holes for clamping the hoop 43 are formed in the upper fixing strip 41 and the lower fixing strip 42, the number of the bolt holes is larger than that of the hoop 43, so that a constructor can conveniently adjust the position of the hoop 43, the constructor arranges the bayonets of the hoop 43 on the bolt holes, and then screws the bolts into the bolt holes and presses the hoop 43.

Further, a base 90 is disposed under the lower clip 20, and a reinforcing rib 100 is disposed at a connection portion between the lower clip 20 and the base 90, so as to improve the overall stability of the transformer 10.

The utility model discloses a concrete theory of operation: the utility model reduces the winding voltage of the transformer 10 by installing a plurality of series resistors 110 at the periphery of the transformer 10 to divide the voltage, indirectly reduces the excitation surge current, by rigidly connecting the upper fixing strip 41 and the lower fixing strip 42 to the original upper and lower clamping pieces 20 of the transformer 10, and symmetrically arranging a plurality of anchor ears 43 with the same number on the upper fixing strip 41 and the lower fixing strip 42, the upper fixing strip 41, the lower fixing strip 42 and the plurality of anchor ears 43 are combined into a resistor bracket 40 which can be used for installing and removing the series resistor 110, then, a plurality of series resistors 110 are mounted on the resistor support 40, in this way, compared with the case of the series resistor which is manufactured separately on the market, the series resistor is mounted in the case, the enclosure is then mounted on the transformer 10 in a manner that not only occupies a small volume, does not cause any trouble in cable routing, but also has more integrity.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A device for restraining excitation inrush current applied to a transformer is characterized by comprising a lower clamping piece fixedly arranged at the front and back sides of the lower side of the transformer, an upper clamping piece fixedly arranged at the front and back sides of the upper side of the transformer, a resistor support and a plurality of series resistors arranged on the resistor support, wherein the resistor support comprises an upper fixing strip and a lower fixing strip, the upper fixing strip is screwed on the upper clamping piece, the lower clamping piece is upwards screwed with a plurality of supporting plates, the lower fixing strip is rigidly connected at the upper ends of the supporting plates, a plurality of hoops with the same number are respectively clamped on the upper fixing strip and the lower fixing strip, a hoop clamped on the lower fixing strip is correspondingly arranged under any hoop on the upper fixing strip, the upper end and the lower end of each series resistor are respectively arranged in the upper hoop and the lower hoops which are correspondingly arranged, and a high-voltage vacuum contactor is also arranged above the upper clamping piece.

2. The device for suppressing magnetizing inrush current for transformer as claimed in claim 1, wherein a connecting rod is disposed between the two supporting plates, and both ends of any connecting rod penetrate through the two supporting plates and are connected to the connecting terminal of the transformer.

3. The magnetizing inrush current suppression device for transformers according to claim 1, wherein the upper clamp member and the lower clamp member are screwed together by a stud bolt.

4. The device for suppressing magnetizing inrush current for transformer of claim 1, wherein a plurality of bolt holes are formed on each of the upper and lower fixing bars, and the number of the bolt holes is greater than the number of the anchor ears.

5. The device for suppressing magnetizing inrush current for transformer according to claim 1, wherein a base is disposed under the lower clip, and a connecting portion between the lower clip and the base is provided with a reinforcing rib.