CN2416585Y

CN2416585Y - Outdoor dry transformer on column

Info

Publication number: CN2416585Y
Application number: CN 00227585
Authority: CN
Inventors: 王邦文; 胡成; 胡建新; 胡培中
Original assignee: SHUNDE SPECIAL TRANSFORMER FACTORY
Current assignee: SHUNDE SPECIAL TRANSFORMER FACTORY
Priority date: 2000-03-15
Filing date: 2000-03-15
Publication date: 2001-01-24
Anticipated expiration: 2010-03-15

Abstract

The utility model relates to an outdoor dry transformer on a column, which comprises a transformer body which is composed of an iron core and high-voltage and low-voltage windings and a guard shield. The inner layer of low-voltage winding and the outer layer of high-voltage winding are integral coils integrally cast by filled epoxy resin; the outer surface of the coil coated with semiconductor material connects with the ground; a grounding shielding layer is arranged between the high-voltage and low-voltage windings; the high-voltage outlet is led out by the cable directly. The outdoor dry transformer on a column has the advantages of moistureproof performance, fire retardant performance, maintenance-free performance and strong capacity for resisting short circuits, which the dry transformer has; simultaneously, the utility model can be arranged outdoors, and also saves installation space and maintenance cost. Because the utility model is near the load, the power supply is stable and reliable, and the line consumption is low, without being affected by high harmonic interference from other users.

Description

Dry-type transformer on the outdoor type post

The utility model relates to dry-type transformer on a kind of outdoor type post that mainly is applicable to small-sized dwelling house and minimized office building.

Existing distribution transformer mostly is outdoor oil immersed type or indoor dry-type transformer greatly, towards a slice sub-district or the power supply of building, all exists floor space big, secondary line is long wait not enough.For the user away from the center of supply, the single household power consumption is big and relatively disperse, power supply quality is required higher again small-sized residential customer, and vast rural subscribers, and existing transformer is difficult to satisfy their demand.

The purpose of this utility model aims to provide dry-type transformer on a kind of outdoor type post that dispersion load such as small-sized dwelling house, villa rustica or the bigger user of single household power consumption is provided stable, safety, the supply of high-quality alternating electromotive force, to overcome weak point of the prior art.

Be applicable to dry-type transformer on the outdoor type post in small-sized dwelling house and minimized office building by this purpose design a kind of, comprise the transformer body and the guard shield that are made of iron core, high pressure winding, low pressure winding, its architectural feature is the whole coil that described internal layer low pressure winding and outer high pressure winding form for the cast of band filling epoxy resin one; The coil outer surface is coated with semiconductor substance and ground connection, and main insulation is applied on the resin-cast solid insulation fully; Be provided with ground shield between the high-low pressure winding; High-voltage terminal is that cable is directly drawn.

Described low pressure winding is one section two-layer drum type brake winding, and the high pressure winding is the drum type brake winding of multisectional multilayer.The semiconductor substance of coil outer surface coating is generally the high value semiconductor varnish.According to the design-calculated needs, can between described low pressure winding and high pressure winding, be provided with the cast heat dissipation wind channel.Screen between described high-low pressure winding is coated semiconductor material, copper mesh or Copper Foil.This ground shield can be kept apart low-pressure side (promptly inserting the indoor side of user) safely with the 10kV high-pressure side.Described transformer is integrated with high pressure overvoltage release guard device, and this device is connected in parallel on the outer high pressure lead-out wire position of housing.

The utility model has the protection against the tide of dry-type transformer, fire-retardant, non-maintaining, advantage that anti-short circuit capability is strong concurrently, can be installed on the open air again simultaneously, has saved installing space and maintenance cost.Because near load, so power supply is stable, reliable, line loss is low, is not subjected to the interference of other users' high order harmonic component.And simple installation.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is that an example structure master looks schematic diagram;

Fig. 2 is the schematic top plan view of Fig. 1.

Fig. 3 looks schematic diagram for the transformer device structure master;

Fig. 4 is the schematic top plan view of Fig. 3.

Fig. 5 looks schematic diagram for the loop construction master;

Fig. 6 is the schematic top plan view of Fig. 5.

Fig. 7 handles structural representation for high-voltage terminal.

Fig. 8 is the another kind of processing mode structural representation of high-voltage terminal;

Fig. 9 is the schematic top plan view of Fig. 8.

Figure 10 is the accessory configuration schematic diagram.

Referring to Fig. 1, Fig. 2, resin casting dry-type transformer 2 places among the cylindric guard shield 3, iron core, coil surface and shell one point earth, and top one side is provided with high-voltage terminal 1, and opposite side is provided with low pressure outlet 4.Except that exposed low-voltage wiring terminal, the transformer body surface in the shell of this product and the shell all insulate fully with 10kV.Shell bottom plate and top cover edge are provided with louvre.

Referring to Fig. 3, Fig. 4, transformer is made of the coil 6 of one cast, the iron core 7 and the fastening folder 5 of single-column band return yoke.Unshakable in one's determination repeatedly being amassed by the cold-reduced silicon sheet full bias seam forms, and no punching constitutes a transformer body through fastener and coil.

Referring to Fig. 5, Fig. 6, the high-low pressure winding 16,17 of transformer is band filling epoxy resin 15 one molded coils.Main insulation is born by the solid epoxy of cast.Needs according to heat radiation can be provided with cast air channel 8.Low pressure winding 17 is one section two-layer drum type brake winding 11, and high pressure winding 16 is the drum type brake winding 13 of multisectional multilayer.For guaranteeing fail safe, the reliability of transformer operation, separate with earth shield copper mesh 10 between the high-low pressure winding.Coil surface coating semiconductor varnish 14 and ground connection are to guarantee that main insulation is applied on the epoxy resin fully.9 is the high-voltage terminal cable among the figure, and 12 is the coil boss.

Referring to Fig. 7-Fig. 9, high pressure adopts cable outlet, and high-tension cable can adopt dual mode with being connected of high-tension coil.Mode one as shown in Figure 7, described high-voltage terminal cable 9 is special-purpose 10kV level high-tension cable; One end stretches in the casting resin, in coil boss 12 positions and high-voltage terminal welding 21; The other end directly passes closure head, connects the 10kV high voltage transmission line.Mode two is as Fig. 8, shown in Figure 9, and described high-voltage terminal is cast with two direct

insertion cable joints

18,19 in coil boss 12 positions, by the elbow plug-in type 10kV cable connector head connection high-tension cable of special use, draws shell and inserts the 10kV high voltage transmission line outward.

Referring to Figure 10, described transformer 2 is integrated with high pressure overvoltage release guard device 22, and this device is connected in parallel on the lead-out wire position of the outer high-voltage terminal cable 9 of housing.23 is the low pressure outlet terminal among the figure, and B is connected to the 10kV power transmission line, and it is indoor that C is connected to the user.

Screen between described high-low pressure winding can be coated semiconductor material, copper mesh or Copper Foil.

Claims

1. dry-type transformer on the outdoor type post that is applicable to small-sized dwelling house and minimized office building, comprise the transformer body (2) and the guard shield (3) that constitute by (7), high pressure winding (16) unshakable in one's determination, low pressure winding (17), it is characterized in that the whole coil (6) that described internal layer low pressure winding and outer high pressure winding form for the cast of band filling epoxy resin one; The coil outer surface is coated with semiconductor substance (14) and ground connection; Be provided with ground shield (10) between the high-low pressure winding; High-voltage terminal (1) is directly drawn for cable.

2. dry-type transformer on the post according to claim 1 is characterized in that described low pressure winding is one section two-layer drum type brake winding, and the high pressure winding is the drum type brake winding of multisectional multilayer.

3. dry-type transformer on the post according to claim 1 and 2 is characterized in that being provided with between described low pressure winding and the high pressure winding cast heat dissipation wind channel (8).

4. dry-type transformer on the post according to claim 1 and 2 is characterized in that the semiconductor substance of described coil outer surface coating is the high value semiconductor varnish.

5. dry-type transformer on the post according to claim 1 is characterized in that the screen between described high-low pressure winding is coated semiconductor material, copper mesh or Copper Foil.

6. dry-type transformer on the post according to claim 1 is characterized in that described high-voltage terminal cable is a 10kV level high-tension cable; One end stretches in the casting resin, in coil boss (12) position and high-voltage terminal welding; The other end directly passes closure head, connects the 10kV high voltage transmission line.

7. dry-type transformer on the post according to claim 1, it is characterized in that described high-voltage terminal is cast with two direct insertion cable joints (18,19) in the coil lug boss position, elbow plug-in type 10kV cable connector head by special use connects high-tension cable, draws shell and inserts the 10kV high voltage transmission line outward.

8. dry-type transformer on the post according to claim 1 is characterized in that described transformer is integrated with high pressure overvoltage release guard device (22), and this device is connected in parallel on the outer high pressure lead-out wire position of housing.