CN102403114A - Outdoor box-type 10-20kV voltage transformer - Google Patents

Abstract

The invention is an outdoor box-type 10-20kV voltage transformer, which includes a high-voltage insulating bushing, a metal box body, a voltage transformer body, a voltage transformer secondary winding outlet terminal board, and a channel steel; the high-voltage insulating bushing Pass through the upper end surface of the metal box and connect with the two terminals of the outlet of the primary winding of the voltage transformer, keep a certain space distance between the body of the voltage transformer and the metal box, and install the terminal board for the outlet of the secondary winding of the voltage transformer On the outer side of the lower end of one side of the metal box, the voltage transformer body and the metal box are installed on the channel steel; the outdoor box-type 10-20kV voltage transformer is developed according to the actual needs of the distribution network site. Converter appliances for power grid protection, detection, and electric energy metering can prevent oil-immersed voltage transformers from leaking oil and epoxy resin cast voltage transformers from aging and cracking defects in wind and sun; its application can improve distribution network The safe operation of the system improves the reliability of power supply, reduces the damage of transformers, improves the power supply, and increases the benefits of enterprises and society.

Description

Outdoor box type 10~20kV voltage transformer

technical field

The invention relates to an outdoor box-type 10-20kV voltage transformer, which is a transformer applied to power supply protection, detection and electric energy measurement of distribution networks.

Background technique

At present, with the rapid development of industrial and agricultural production, the rapid improvement of the national economy, the continuous improvement of people's living standards, the unprecedented development of the power industry, and the rapid development of the national power grid construction. The power of the grid is transformed and delivered to thousands of households through the distribution network and distribution transformers. The voltage transformers used for the protection, detection, and high-voltage voltage signal collection of the current distribution network and distribution transformer systems are oil-immersed. type, epoxy resin casting type; the disadvantage of oil-immersed voltage transformer is that it is easy to leak oil, the insulation is difficult to guarantee, and it often breaks down; the disadvantage of epoxy resin casting type voltage transformer is that epoxy resin is easy to be exposed to wind and sun. Aging and cracking, causing power outages. If the outdoor box-type voltage transformer is used, the above defects can be avoided.

Contents of the invention

The invention provides an outdoor box-type 10-20kV voltage transformer, which can avoid the oil leakage failure of the oil-immersed voltage transformer and the aging, cracking and power failure accidents of the epoxy resin casting type voltage transformer.

Outdoor box-type 10-20kV voltage transformer, including high-voltage insulating bushing, metal box body, voltage transformer body, secondary winding outlet terminal board of voltage transformer, and channel steel; the high-voltage insulating bushing passes through the metal The box body is connected to two outlets of the primary winding of the voltage transformer, and a certain space distance is maintained between the voltage transformer body and the metal box body, and the secondary winding outlet terminal board of the voltage transformer is installed on the metal box. Outside the lower end of one side of the box body, a rain cover is installed on the top of the outlet terminal board, and the voltage transformer body and the metal box body are installed on the channel steel.

The metal box is in a three-dimensional shape, six sides are metal, and there are two holes on it for installing high-voltage insulating bushings. The voltage transformer body is installed in the metal box, and the metal box is installed on the channel steel. The outer side of the lower end of one side of the metal box body is installed with the secondary winding outgoing terminal board of the voltage transformer.

The voltage transformer body includes an iron core, a primary winding, a secondary winding, and epoxy resin; the iron core is O-shaped, the primary winding is placed on one side of the iron core O-shaped, and the secondary winding is placed on the iron core. The other side of the core is O-shaped; the epoxy resin is used to cast the transformer body, and the overall casting package is tightly glued; the two ends of the primary winding are connected to the high-voltage two-phase line; the two ends of the secondary winding are connected Protection, detection, electric energy metering circuit.

The outdoor box-type 10-20kV voltage transformer is developed according to the actual needs of the site as a transformer for distribution network protection, detection, and electric energy measurement. Compared with the prior art, the present invention has outstanding substantive features and significant advantages Progressive, specifically, the outdoor box-type voltage transformer has a reasonable design and ideally realizes the transformation of power distribution network protection, detection, and electric energy measurement. It will play a positive role in ensuring the safe operation of the power grid. The outdoor The specific advantages of box-type 10-20kV voltage transformer:

The invention provides an outdoor box-type 10-20kV voltage transformer, which can avoid the oil leakage failure of the oil-immersed voltage transformer and the aging and cracking defects of the epoxy resin casting type voltage transformer.

The application of outdoor box-type 10-20kV voltage transformers can reduce accidents in distribution network and distribution transformer system, increase power supply, and increase enterprise and social benefits.

The application of outdoor box-type 10-20kV voltage transformer can improve the safe operation of the distribution network system, improve the reliability of power supply, reduce the damage of the transformer, and reduce the equipment investment of the distribution network system.

Description of drawings

Fig. 1 is the structural schematic diagram of outdoor box type 10～20kV voltage transformer of the present invention;

Fig. 2 is a schematic diagram of the metal box structure of the present invention;

Fig. 3 is a composition diagram of the voltage transformer body of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is a structural schematic diagram of an outdoor box-type 10-20kV voltage transformer of the present invention, including a high-voltage insulating bushing 1, a metal box body 2, a voltage transformer body 3, a voltage transformer secondary winding outlet terminal board 4, and a voltage transformer installation Channel steel 5; the high-voltage insulating bushing passes through the upper end surface of the metal box and is connected to the two terminals of the primary winding outlet of the voltage transformer, and a certain space distance is maintained between the voltage transformer body and the metal box. The outlet wiring board of the secondary winding of the voltage transformer is installed on the outer side of the lower end of one side of the metal box, and the upper end of the outlet wiring board is equipped with a rain cover, and the voltage transformer body and the metal box are installed on the channel steel. The voltage transformer body is installed in the metal box, and (to avoid the wind and sun of the voltage transformer) is fixed on the installation channel steel. A certain space distance is kept between the voltage transformer body and the metal box. For heat dissipation and ventilation, the outdoor box The outlet lines of the two high-voltage insulating bushings at the upper end of the type 10kV voltage transformer are respectively connected to the high-voltage two-phase line, and the outlet wires of the secondary winding of the voltage transformer are connected to protection, detection, and electric energy metering devices.

Fig. 2 is the structural representation of metal box body of the present invention, and described metal box body is three-dimensional shape, and six sides are metal plates 2, and two holes 21 are arranged on upper end face; For installing high-voltage insulating bushing, voltage transformer is installed in the metal box body The body and the metal box are installed on the channel steel 5, and the outer side of the lower end of one side of the metal box is installed with a voltage transformer secondary winding outgoing line terminal board 4, and the top of the outgoing line terminal board is equipped with a rain cover. The metal box is used to protect the voltage transformer from wind and sun.

Fig. 3 is a composition diagram of the voltage transformer body of the present invention, the voltage transformer body includes an iron core 32,

Primary winding 31, secondary winding 33, epoxy resin 34; the iron core is O-shaped, the primary winding is placed on one side of the iron core O-shaped, and the secondary winding is placed on the other side of the iron core O-shaped; Epoxy resin is used to cast the body of the transformer, poured as a whole, tightly wrapped and glued firmly, the purpose is to prevent moisture and keep the body of the transformer well insulated. The two terminals L1 and L2 of the primary winding are connected to the high-voltage two-phase line; the two terminals K1 and K2 of the secondary winding are connected to protection, detection and electric energy metering circuits.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; 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 present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (3)

1. An outdoor box-type 10-20kV voltage transformer, characterized in that: it includes a high-voltage insulating bushing, a metal box, a voltage transformer body, a voltage transformer secondary winding outlet terminal board, and a voltage transformer installation channel steel; The high-voltage insulating bushing passes through the upper end surface of the metal box and is connected to the two ends of the primary winding outlet of the voltage transformer, and a certain space distance is maintained between the voltage transformer body and the metal box. The outlet wiring board of the secondary winding of the voltage transformer is installed on the outer side of the lower end of one side of the metal box, and the upper end of the outlet wiring board is equipped with a rain cover, and the voltage transformer body and the metal box are installed on the channel steel. 2. The outdoor box-type 10-20kV voltage transformer according to claim 1, characterized in that: the metal box is a three-dimensional shape, six sides are metal plates, and there are two holes on it for installing high-voltage insulating bushings , the voltage transformer body is installed in the metal box, the metal box is installed on the channel steel, and the secondary winding outlet terminal board of the voltage transformer is installed outside the lower end of one side of the metal box. 3. The outdoor box-type 10-20kV voltage transformer according to claim 1, characterized in that: the voltage transformer body includes an iron core, a primary winding, a secondary winding, and epoxy resin; the iron core is O Shaped, the primary winding is set on one side of the iron core O-shaped, and the secondary winding is set on the other side of the iron core O-shaped; the epoxy resin is used to cast the transformer body, cast as a whole, and be tightly wrapped and glued; The two ends of the primary winding are respectively connected to the high-voltage two-phase line through the high-voltage insulating sleeve; the two ends of the secondary winding are connected to detection, protection, and electric energy metering circuits.

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