High-capacity American transformer

Abstract

The utility model discloses a high-capacity American transformer. The high-capacity American transformer comprises a primary coil, a secondary coil, a first fuse circuit, a second fuse circuit and a third fuse circuit, each of the first fuse circuit, the second fuse circuit and the third fuse circuit comprises a load switch, a first series circuit and a second series circuit, and the first end of the load switch is the input end of the first fuse circuit, the input end of the second fuse circuit or the input end of the third fuse circuit; a second end of the load switch is connected to a first series circuit input end and a second series circuit input end; a first series circuit output end and a second series circuit output end are connected to form a first fuse circuit output end, a second fuse circuit output end or a third fuse circuit output end; each of the first series circuit and the second series circuit comprises a backup fuse and a plug-in fuse. The high-capacity American transformer solves the problem that in the prior art, a traditional fuse wiring mode cannot meet the large-current requirement.

Description

Technical Field

[0001] The utility model relates to a transformer, in particular to a large-capacity American-style transformer. Background Art

[0002] The Chinese patent discloses a dry-type transformer with application number CN202022643089.7 that uses plug-in fuses to control the output voltage. This dry-type transformer that uses plug-in fuses to control the output voltage belongs to the technical field of distribution equipment, and includes a transformer housing, an iron core, an upper clamping piece, and a lower clamping piece. The iron core is wound with coils, and the iron core is arranged inside the transformer housing. It also includes a fuse base. The upper clamping piece is connected with a terminal block, and the fuse base is arranged on the terminal block; the terminal block is provided with an input end, an output end, and a tap lead end; the coil includes a primary coil and a secondary coil. There are two iron cores, and the two ends of the primary coils around the two iron cores are connected in parallel and connected to the input end through wires; one end of the secondary coils around the two iron cores is respectively connected to the output end; the two secondary coils are provided with tap leads, and the tap leads are connected to the tap lead end. The two ends of the fuse base are respectively connected to each pair of tap lead ends.

[0003] Although the dry-type transformer that uses plug-in fuses to control the output voltage can achieve the function of voltage transformation, the disadvantages of this dry-type transformer that uses plug-in fuses to control the output voltage are still: Since the capacities of large-capacity American-style transformers are 1600 kVA and 2000 kVA products, and there are no current models of this size in the production factories of plug-in fuses and backup fuses, the traditional fuse wiring method cannot meet the large-current demand. Summary of the Utility Model

[0004] The utility model aims to provide a large-capacity American-style transformer to solve the problem that the traditional fuse wiring method in the prior art cannot meet the large-current demand.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model discloses a large-capacity American transformer, comprising: a primary coil, a secondary coil, a first fuse circuit, a second fuse circuit and a third fuse circuit; the first fuse circuit, the second fuse circuit and the third fuse circuit all comprise: a load switch, a first series circuit and a second series circuit, the first end of the load switch is the input end of the first fuse circuit, the input end of the second fuse circuit or the input end of the third fuse circuit, the second end of the load switch is connected to the input ends of the first series circuit and the second series circuit, and the output ends of the first series circuit and the output ends of the second series circuit are connected to form the output end of the first fuse circuit, the output end of the second fuse circuit or the output end of the third fuse circuit; the first series circuit and the second series circuit both comprise: a backup fuse and a plug-in fuse, one end of the backup fuse is the input end of the first series circuit or the input end of the second series circuit, the other end of the backup fuse is connected to one end of the plug-in fuse, and the other end of the plug-in fuse is the output end of the first series circuit or the output end of the second series circuit; the input end of the first fuse circuit is connected to the A-phase incoming line, the second fuse circuit is connected to the B-phase incoming line, and the third fuse circuit is connected to the C-phase incoming line; the primary coil comprises: an A-phase first coil, an A-phase second coil, a B-phase first coil, a B-phase second coil, a C-phase first coil and a C-phase second coil, the upper end of the A-phase first coil is connected to the output end of the first fuse circuit, the upper end of the A-phase first coil is connected to the lower end of the C-phase second coil, the lower end of the A-phase first coil is arranged close to the upper end of the A-phase second coil, and there is a break between the lower end of the A-phase first coil and the upper end of the A-phase second coil; the upper end of the B-phase first coil is connected to the output end of the second fuse circuit, the upper end of the B-phase first coil is connected to the lower end of the A-phase second coil, the lower end of the B-phase first coil is arranged close to the upper end of the B-phase second coil, and there is a break between the lower end of the B-phase first coil and the upper end of the B-phase second coil; the upper end of the C-phase first coil is connected to the output end of the second fuse circuit, the upper end of the C-phase first coil is connected to the lower end of the B-phase second coil, the lower end of the C-phase first coil is arranged close to the upper end of the C-phase second coil, and there is a break between the lower end of the C-phase first coil and the upper end of the C-phase second coil; the secondary coil comprises: an a-phase coil, a b-phase coil and a c-phase coil, the upper ends of the a-phase coil, the b-phase coil and the c-phase coil are connected to form an o-phase output end, the lower end of the a-phase coil is the a-phase output end, the lower end of the b-phase coil is the b-phase output end, and the lower end of the c-phase coil is the c-phase output end; the A-phase first coil, the A-phase second coil and the a-phase coil are all wound around the first iron core, the B-phase first coil, the B-phase second coil and the b-phase coil are all wound around the second iron core, and the C-phase first coil, the C-phase second coil and the c-phase coil are all wound around the third iron core.

[0007] Preferably, the load switch, the backup fuse and the plug-in fuse are all installed on the rear mounting plate.

[0008] Preferably, the a-phase output terminal, b-phase output terminal, c-phase output terminal, and o-phase output terminal are all installed on the front mounting plate.

[0009] Preferably, a connecting seat is installed on the front mounting plate, and an A-phase connector, a B-phase connector, and a C-phase connector are installed on the connecting seat. The A-phase connector, B-phase connector, and C-phase connector are respectively connected to the A-phase incoming line power, B-phase incoming line power, and C-phase incoming line power.

[0010] Preferably, the connecting seat is installed on the first edge of the front mounting plate, and the a-phase output terminal, b-phase output terminal, c-phase output terminal, and o-phase output terminal are arranged close to the second edge of the front mounting plate. The first edge and the second edge are parallel to each other.

[0011] Preferably, from the second edge to the first edge, the o-phase output terminal, a-phase output terminal, b-phase output terminal, and c-phase output terminal are arranged in sequence.

[0012] Preferably, the connection between the connecting seat and the c-phase output terminal is blocked by an insulating device.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1) In this application, through the A-phase first coil, A-phase second coil, B-phase first coil, B-phase second coil, C-phase first coil, C-phase second coil, a-phase coil, b-phase coil, and c-phase coil, mutual inductance between coils is achieved, thus achieving the purpose of voltage transformation. At the same time, the A-phase incoming line power, B-phase incoming line power, and C-phase incoming line power connected to the primary coil are transformed into four-phase outputs of a-phase, b-phase, c-phase, and o-phase, achieving the purpose of changing from three-phase high-voltage input to low-voltage four-phase output.

[0015] 2) By connecting a parallel first series circuit and a second series circuit at the voltage transformation connection points of the three-phase high-voltage input, that is, the A-phase incoming line power, B-phase incoming line power, and C-phase incoming line power, which are two groups of backup fuses and plug fuses in parallel, the problem that a single group of backup fuses and plug fuses cannot pass a large current is avoided. It ensures that a large current can smoothly pass through the parallel first series circuit and second series circuit. The parallel first series circuit and second series circuit have a current-sharing effect, thus ensuring the safety of the circuit and also meeting the requirements of high voltage and high current of the product.

[0016] Other advantages, objectives, and features of the utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a coil layout diagram of a large-capacity American transformer.

[0018] Figure 2 It is the front view of a large-capacity American transformer.

[0019] Figure 3 It is the side view of a large-capacity American transformer.

[0020] Figure 4 It is the top view of a large-capacity American transformer.

[0021] Reference numerals: load switch 1, backup fuse 2, plug-in fuse 3, rear mounting plate 4, o-phase output terminal 50, a-phase output terminal 51, b-phase output terminal 52, c-phase output terminal 53, front mounting plate 6, insulating device 7, A-phase connector 81, B-phase connector 82, C-phase connector 83. Detailed implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific implementation manners:

[0023] Such as Figures 1 to 4As shown, the present utility model discloses a large-capacity American transformer, comprising: a primary coil, a secondary coil, a first fuse circuit, a second fuse circuit, and a third fuse circuit; the first fuse circuit, the second fuse circuit, and the third fuse circuit each include: a load switch, a first series circuit, and a second series circuit. The first end of the load switch is the input end of the first fuse circuit, the input end of the second fuse circuit, or the input end of the third fuse circuit. The second end of the load switch is connected to the input ends of the first series circuit and the second series circuit. The output end of the first series circuit and the output end of the second series circuit are connected to form the output end of the first fuse circuit, the output end of the second fuse circuit, or the output end of the third fuse circuit; both the first series circuit and the second series circuit include: a backup fuse and a plug-in fuse. One end of the backup fuse is the input end of the first series circuit or the input end of the second series circuit. The other end of the backup fuse is connected to one end of the plug-in fuse. The other end of the plug-in fuse is the output end of the first series circuit or the output end of the second series circuit; the input end of the first fuse circuit is connected to the A-phase incoming line, the second fuse circuit is connected to the B-phase incoming line, and the third fuse circuit is connected to the C-phase incoming line; the primary coil includes: an A-phase first coil, an A-phase second coil, a B-phase first coil, a B-phase second coil, a C-phase first coil, and a C-phase second coil. The upper end of the A-phase first coil is connected to the output end of the first fuse circuit. The upper end of the A-phase first coil is connected to the lower end of the C-phase second coil. The lower end of the A-phase first coil is disposed close to the upper end of the A-phase second coil, and there is a break between the lower end of the A-phase first coil and the upper end of the A-phase second coil; the upper end of the B-phase first coil is connected to the output end of the second fuse circuit. The upper end of the B-phase first coil is connected to the lower end of the A-phase second coil. The lower end of the B-phase first coil is disposed close to the upper end of the B-phase second coil, and there is a break between the lower end of the B-phase first coil and the upper end of the B-phase second coil; the upper end of the C-phase first coil is connected to the output end of the second fuse circuit. The upper end of the C-phase first coil is connected to the lower end of the B-phase second coil. The lower end of the C-phase first coil is disposed close to the upper end of the C-phase second coil, and there is a break between the lower end of the C-phase first coil and the upper end of the C-phase second coil; the secondary coil includes: an a-phase coil, a b-phase coil, and a c-phase coil. The upper ends of the a-phase coil, the b-phase coil, and the c-phase coil are connected to form an o-phase output end. The lower end of the a-phase coil is the a-phase output end. The lower end of the b-phase coil is the b-phase output end. The lower end of the c-phase coil is the c-phase output end; the A-phase first coil, the A-phase second coil, and the a-phase coil are all wound around the first iron core. The B-phase first coil, the B-phase second coil, and the b-phase coil are all wound around the second iron core. The C-phase first coil, the C-phase second coil, and the c-phase coil are all wound around the third iron core. The A-phase first coil is located above the A-phase second coil. The B-phase first coil is located above the B-phase second coil. The C-phase first coil is located above the C-phase second coil.

[0024] The load switch, the backup fuse and the plug-in fuse are all installed on the rear mounting plate. The installation of the load switch, the backup fuse and the plug-in fuse is realized.

[0025] The a-phase output terminal 51, the b-phase output terminal 52, the c-phase output terminal 53 and the o-phase output terminal 50 are all installed on the front mounting plate. The installation of the a-phase output terminal 51, the b-phase output terminal 52, the c-phase output terminal 53 and the o-phase output terminal 50 is realized.

[0026] A connecting seat is installed on the front mounting plate. An A-phase connector 81, a B-phase connector 82 and a C-phase connector 83 are installed on the connecting seat. The A-phase connector 81, the B-phase connector 82 and the C-phase connector 83 are respectively connected to the A-phase incoming power, the B-phase incoming power and the C-phase incoming power. It is realized that it is customary to install both the input and the output on the front mounting plate. At the same time, after connecting high voltage from the A-phase connector 81, the B-phase connector 82 and the C-phase connector 83, the load switch, the backup fuse and the plug-in fuse for connecting high voltage are arranged on the rear mounting plate. Since there are many components used in parallel for the backup fuse and the plug-in fuse in order to meet large current, they are arranged opposite to the positions of the low-voltage o-phase output terminal 50, a-phase output terminal 51, b-phase output terminal 52 and c-phase output terminal 53 to avoid mutual interference between high voltage and low voltage. Therefore, this layout method not only meets the requirement that both the input and the output are on the customary front mounting plate, but also meets the requirement that the rear mounting plate with more load switches, backup fuses and plug-in fuses for connecting high voltage is set far away from the front mounting plate, reducing the risk of mutual interference between high voltage and low voltage.

[0027] The connecting seat is installed on the first edge of the front mounting plate. The a-phase output terminal 51, the b-phase output terminal 52, the c-phase output terminal 53 and the o-phase output terminal 50 are arranged close to the second edge of the front mounting plate. The first edge and the second edge are parallel to each other.

[0028] From the second edge to the first edge, the o-phase output terminal 50, the a-phase output terminal 51, the b-phase output terminal 52 and the c-phase output terminal 53 are arranged in sequence. The layout of the o-phase output terminal 50, the a-phase output terminal 51, the b-phase output terminal 52 and the c-phase output terminal 53 is convenient for connecting external devices.

[0029] The connection between the connecting seat and the c-phase output terminal is separated by an insulating device.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. Large-capacity American transformer, characterized in that, Comprising: A primary coil, a secondary coil, a first fuse circuit, a second fuse circuit, and a third fuse circuit; The first fuse circuit, the second fuse circuit, and the third fuse circuit each include: a load switch, a first series circuit, and a second series circuit. The first end of the load switch is the input end of the first fuse circuit, the input end of the second fuse circuit, or the input end of the third fuse circuit. The second end of the load switch is connected to the input ends of the first series circuit and the second series circuit. The output ends of the first series circuit and the second series circuit are connected to form the output end of the first fuse circuit, the output end of the second fuse circuit, or the output end of the third fuse circuit; Both the first series circuit and the second series circuit include: a backup fuse and a plug-in fuse. One end of the backup fuse is the input end of the first series circuit or the input end of the second series circuit. The other end of the backup fuse is connected to one end of the plug-in fuse. The other end of the plug-in fuse is the output end of the first series circuit or the output end of the second series circuit; The input end of the first fuse circuit is connected to the A-phase incoming line, the second fuse circuit is connected to the B-phase incoming line, and the third fuse circuit is connected to the C-phase incoming line; The primary coil includes: an A-phase first coil, an A-phase second coil, a B-phase first coil, a B-phase second coil, a C-phase first coil, and a C-phase second coil. The upper end of the A-phase first coil is connected to the output end of the first fuse circuit. The upper end of the A-phase first coil is connected to the lower end of the C-phase second coil. The lower end of the A-phase first coil is arranged close to the upper end of the A-phase second coil, and there is a break between the lower end of the A-phase first coil and the upper end of the A-phase second coil; The upper end of the B-phase first coil is connected to the output end of the second fuse circuit. The upper end of the B-phase first coil is connected to the lower end of the A-phase second coil. The lower end of the B-phase first coil is arranged close to the upper end of the B-phase second coil, and there is a break between the lower end of the B-phase first coil and the upper end of the B-phase second coil; The upper end of the C-phase first coil is connected to the output end of the second fuse circuit. The upper end of the C-phase first coil is connected to the lower end of the B-phase second coil. The lower end of the C-phase first coil is arranged close to the upper end of the C-phase second coil, and there is a break between the lower end of the C-phase first coil and the upper end of the C-phase second coil; The secondary coil includes: an a-phase coil, a b-phase coil, and a c-phase coil. The upper ends of the a-phase coil, the b-phase coil, and the c-phase coil are connected to form an o-phase output end. The lower end of the a-phase coil is the a-phase output end, the lower end of the b-phase coil is the b-phase output end, and the lower end of the c-phase coil is the c-phase output end; The A-phase first coil, the A-phase second coil, and the a-phase coil are all wound around the first iron core. The B-phase first coil, the B-phase second coil, and the b-phase coil are all wound around the second iron core. The C-phase first coil, the C-phase second coil, and the c-phase coil are all wound around the third iron core.

2. The large-capacity American transformer according to claim 1, characterized in that, The load switch, the backup fuse, and the plug-in fuse are all installed on the rear mounting plate.

3. The large-capacity American transformer according to claim 2, characterized in that, The a-phase output end, the b-phase output end, the c-phase output end, and the o-phase output end are all installed on the front mounting plate.

4. The large-capacity American transformer according to claim 3, characterized in that, A connection seat is installed on the front mounting plate. An A-phase connector, a B-phase connector, and a C-phase connector are installed on the connection seat. The A-phase connector, the B-phase connector, and the C-phase connector are respectively connected to the A-phase incoming line, the B-phase incoming line, and the C-phase incoming line.

5. The large-capacity American transformer according to claim 4, wherein The connection base is installed on the first edge of the front mounting plate, and the a-phase output terminal, b-phase output terminal, c-phase output terminal, and o-phase output terminal are arranged close to the second edge of the front mounting plate, and the first edge and the second edge are parallel to each other.

6. The large-capacity American transformer according to claim 5, characterized in that, From the second edge to the first edge, the o-phase output terminal, a-phase output terminal, b-phase output terminal, and c-phase output terminal are arranged in sequence.

7. The large-capacity American transformer according to claim 6, wherein, The connection between the connection base and the c-phase output terminal is separated by an insulating device.

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