CN201655515U - Double-voltage double-shunting dry-type transformer - Google Patents

Abstract

The utility model relates to the technical field of the design and the manufacture of a double-voltage double-shunting dry-type transformer. An iron core adopts a full bias seam-stacking iron core; a high-voltage coil takes the shape of a cookie or a cylinder; and a low-voltage coil takes the shape of a cylinder. On the basis of the voltage of each phase of the high-voltage coil ranges from 8 kV*2.5% to 12 kV*2.5%, a 250 V wire turn is additionally arranged at the head end of the coil, a 275 V wire turn is additionally arranged at the tail end thereof, and the original head end and the original tail end serve as taps. By changing the number of wire turns of the high-voltage coil used for transformer running, the combination of different voltages and shunting methods of 8 kV*2.5% to 12 kV*2.5%, 10 kV-1<+3>*2.5%, and 8.5 kV*2.5% to 12.5 kV*2.5% can be achieved on a dry-type distribution transformer. Therefore, the utility model can not only widen the application range of the transformer, but also provide convenience for preparation of the transformer, and reduce inventories of a transformer manufacturer.

Description

Two voltages, two tap dry-type transformer

Technical field

The utility model belongs to the design and manufacturing technology field of transformer, is specially a kind of dry-type power transformer, particularly a kind of pair of voltage, two tap dry-type distribution transformer.

Background technology

In China, 10/0.4kV and 10.5/0.4kV are two commonly used voltages combinations of 10kV level distribution transformer, ± 2 * 2.5% and 10kV _-1 ^{+ 3}The * 2.5%, two kinds of tapping ranges that dry-type transformer is common, usually, every transformer only can be realized a kind of voltage combination, a kind of tapping range, for example: it is 10kV that the transformer that voltage is combined as 10 ± 2 * 2.5%/0.4kV only is satisfied with high tension voltage, low voltage voltage is 0.4kV, the high-voltage tap scope is ± 2 * 2.5% requirement, if desired 10.5 ± 2 * 2.5%/0.4kV or 10 _-1 ^{+ 3}The voltage of * 2.5%/0.4kV, tapping range combination all must can be satisfied by other transformer.

The utility model content

The purpose of this utility model provides and a kind ofly can realize 10kV ± 2 * 2.5%, 10kV on a product _-1 ^{+ 3}* 2.5% with the dry-type distribution transformer of the different voltages of 10.5kV ± 2 * 2.5%, tapping range combination, can enlarge the scope of application of product, can be convenient to power transformer product again and get the raw materials ready, reduce the makers' quantity in stock of transformer.

Structure of the present utility model is: iron core is a full bias seam stack iron core, high-tension coil is cake formula or drum type brake, low-voltage coil is a drum type brake, it is characterized in that: every phase high-tension coil is on the basis of 10kV ± 2 * 2.5%, in the head end of coil increase 250V wire turn, increase the wire turn of 275V in end, head end originally and end all become tap.

Use of the present utility model: establish every phase high-tension coil on the basis of 10kV ± 2 * 2.5%, after the head end of coil increased the wire turn of 250V, its input was called A1, B1, C1; Behind the wire turn of terminal increase 275V, its input is called X1, Y1, Z1; After head end originally becomes tap, be called A2, B2, C2, after end originally becomes tap, be called X2, Y2, Z2.See Fig. 1:, be 10kV ± 2 * 2.5% transformers if A2 (B2, C2), X2 (Y2, Z2) are inserted electrical network; If A1 (B1, C1), X2 (Y2, Z2) are inserted electrical network, be 10kV _-1 ^{+ 3}* 2.5% transformer; If A1 (B1, C1), X1 (Y1, Z1) are inserted electrical network, be 10.5kV ± 2 * 2.5% transformers.

The utility model preferably is arranged on low-voltage coil the outside of single-phase iron core, and high-tension coil is arranged on the outside of low-voltage coil.Coil is sealed forming and hardening by electric insulating sealant or vacuum pressure impregnation is sealed or the epoxide resin vacuum cast.

The said full bias seam stack of the utility model iron core is a prior art.

The said high and low pressure coil of the utility model can be formed by the Nomex paper covered wire or the Copper Foil coiling of H level enamelled wire or du pont company, and coil-conductor insulation, layer insulation, the insulation of coil upper and lower end parts and the inside and outside insulating cylinder of high and low pressure coil all can adopt the Nomex paper of du pont company or other F level, H level, C class F insulating material F.Electric insulating sealant and treatment process that said electric insulating sealant is sealed forming and hardening are prior art, and treatment process that said vacuum pressure impregnation is sealed and poured with epoxy resin technology also are prior art.

The utility model high-tension coil structure can be open type or encapsulated type, and open type is by glass fiber covered wire or Nomex paper covered wire, and coiling is a disc coil, and behind the impregnated insulating paint, coil is not done any sealing.Encapsulated type is a cylindrical layer winding by glass fiber covered wire or enamelled wire or the coiling of Nomex paper covered wire, adopts vacuum pouring technology manufacturing or insulating cement to seal curing.

The utility model low-voltage coil can be if do not establish axial and radial ventilation road.

The utlity model has following advantage: can on a dry-type distribution transformer product, realize 10kV ± 2x2.5%, 10kV _-1 ^{+ 3}* 2.5% different voltages with 10.5kV ± 2x2.5%, tap make up, and can enlarge the scope of application of product, can be convenient to power transformer product again and get the raw materials ready, and reduce the makers' quantity in stock of transformer.

Description of drawings

Fig. 1 is a high-tension coil outlet schematic diagram of the present utility model.

The brace position view that Fig. 2 is embodiment when 10kV ± 2x2.5% state.

Fig. 3 is that embodiment is at 10kV _-1 ^{+ 3}Brace position view during * 2.5% state.

The brace position view that Fig. 4 is embodiment when 10.5kV ± 2x2.5% state.

Embodiment

Embodiment: see Fig. 2～4.Every phase high-tension coil is on the basis of 10kV ± 2 * 2.5%, and after the head end of coil increased the wire turn of 250V, its input was called A1, B1, C1; Behind the wire turn of terminal increase 275V, its input is called X1, Y1, Z1; After head end originally becomes tap, be called A2, B2, C2, after end originally becomes tap, be called X2, Y2, Z2.Product is high pressure brace 1 and position such as Fig. 2 of 2 when 10kV ± 2x2.5% state, is that A2 (B2, C2), X2 (Y2, Z2) are inserted electrical network at this moment.If to the top terminals, position such as Fig. 3 promptly realize 10kV with brace 1 Rotate 180 degree _-1 ^{+ 3}* 2.5% pressure regulation requirement is that A1 (B1, C1), X2 (Y2, Z2) are inserted electrical network at this moment.If again with brace 2 Rotate 180 degree to the bottom terminals, position such as Fig. 4 promptly realize the pressure regulation requirement of 10.5kV ± 2x2.5%, are at this moment A1 (B1, C1), X1 (Y1, Z1) are inserted electrical network.。

Claims (2)

1. two voltages, two tap dry-type transformer, iron core is a full bias seam stack iron core, high-tension coil is cake formula or drum type brake, low-voltage coil is a drum type brake, it is characterized in that: every phase high-tension coil is on the basis of 10kV ± 2 * 2.5%, in the head end of coil increase 250V wire turn, increase the wire turn of 275V in end, head end originally and end all become tap.

2. as the said transformer of claim 1, it is characterized in that: low-voltage coil is arranged on the outside of single-phase iron core, and high-tension coil is arranged on the outside of low-voltage coil.

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