CN205211581U - Modular power type voltage transformer - Google Patents

Abstract

The utility model relates to a combined power supply type voltage transformer, which includes a pressure vessel, and is characterized in that: an insulating bushing is arranged on the pressure vessel, and SF ₆ gas is used as an insulating medium in the pressure vessel and the insulating bushing; A transformer part and a transformer part are installed in the pressure vessel, and the transformer part and the transformer part are connected in parallel by a primary winding. The transformer part includes an iron core, a high-voltage coil, a low-voltage coil and a low-voltage shield, and the transformer part includes a transformer core, a transformer low-voltage shield and a transformer high-voltage coil, and the transformer low-voltage shield is arranged on the transformer iron. on the core. The high-voltage coil is connected to the primary terminal block through a high-voltage conductor, the high-voltage conductor is arranged in the insulating casing, and the primary terminal block extends out of the insulating casing. The utility model solves the situation that some small-capacity power consumption units are difficult to obtain civil electricity, and has the function of measuring and protecting the high-voltage power grid.

Description

Combined Power Type Voltage Transformer

technical field

The utility model relates to a combined power supply type voltage transformer, which belongs to the technical field of electric equipment.

Background technique

SF ₆ gas-insulated transformers use non-combustible, disaster-proof and safe SF ₆ gas as the insulating medium. SF ₆ gas-insulated transformers are mainly used in large-capacity high-voltage power transmission.

The transformer can change high voltage into low voltage and large current into small current, which is used for measurement or protection system. Its function is mainly to convert high voltage or large current into standard low voltage or standard small current in proportion to realize Standardization and miniaturization of measuring instruments, protective equipment and automatic control equipment; meanwhile, transformers can also be used to separate high-voltage systems to ensure the safety of people and equipment.

SF ₆ gas insulated transformers are mainly matched with GIS (gas insulated substation).

In the prior art, it is difficult for some small-capacity power consumers to obtain civilian electricity, such as communication base stations in uninhabited areas, electrified railways, etc.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a combined power supply type voltage transformer, which combines a large ratio small capacity transformer with a high voltage voltage transformer, so that one product has the function of power supply and Full functionality of voltage transformers.

According to the technical solution provided by the utility model, the combined power supply type voltage transformer includes a pressure vessel, which is characterized in that: an insulating bushing is arranged on the pressure vessel, and SF ₆ gas is used in the pressure vessel and the insulating bushing As an insulating medium; a transformer part and a transformer part are installed in the pressure vessel, and the transformer part and the transformer part are connected in parallel by a primary winding.

Further, the transformer part includes an iron core, a high-voltage coil, a low-voltage coil and a low-voltage shield, and the low-voltage shield is arranged between the low-voltage coil and the iron core; the transformer part includes a transformer core, a transformer low-voltage shield and the high-voltage coil of the transformer, and the low-voltage shielding cover of the transformer is arranged on the iron core of the transformer.

Further, the high-voltage coil is connected to the primary wiring bar through a high-voltage conductor, the high-voltage conductor is arranged in the insulating sleeve, and the primary wiring bar extends out of the insulating sleeve.

Further, the high voltage coil of the transformer part and the transformer high voltage coil of the transformer part are connected in parallel by a primary winding.

Further, an explosion-proof device is installed at the bottom of the pressure vessel.

Further, a secondary terminal box is installed outside the pressure vessel, and a density relay is installed in the secondary terminal box.

Further, a voltage equalization shielding cylinder is arranged at the lower part of the insulating sleeve.

The combined power supply type voltage transformer described in the utility model uses a relatively simple and feasible method, which solves the problem that some small-capacity power consumption units have difficulty in obtaining civilian electricity, and at the same time ensures the function of measuring and protecting the high-voltage power grid.

Description of drawings

Fig. 1 is a schematic structural diagram of the combined power supply type voltage transformer described in the present invention.

Fig. 2 is a view along the direction A of Fig. 1 .

Fig. 3 is the wiring diagram of the utility model.

detailed description

Below in conjunction with specific accompanying drawing, the utility model is further described.

As shown in Figures 1 to 3: the combined power supply type voltage transformer includes a primary terminal block 1, a high-voltage conductor 2, an insulating sleeve 3, a voltage equalizing shielding cylinder 4, SF ₆ gas 5, a density relay 6, and a secondary Terminal box 7, iron core 8, high-voltage coil 9, low-voltage coil 10, low-voltage shield 11, pressure vessel 12, explosion-proof device 13, transformer core 14, transformer low-voltage shield 15, transformer high-voltage coil 16, primary winding 17 etc.

As shown in Fig. 1 and Fig. 2, the utility model includes a pressure vessel 12, an insulating bushing 3 is arranged on the pressure vessel 12, a transformer part A and a transformer part B are installed in the pressure vessel 12, and an explosion-proof is installed at the bottom of the pressure vessel 12 In the device 13, a secondary terminal box 7 is installed outside the pressure vessel 12, and a density relay 6 is installed in the secondary terminal box 7; SF ₆ gas 5 is used as an insulating medium in the pressure vessel 12 and the insulating sleeve 3.

The transformer part A includes an iron core 8, a high-voltage coil 9, a low-voltage coil 10 and a low-voltage shield 11, and the low-voltage shield 11 is arranged between the low-voltage coil 10 and the iron core 8; the high-voltage coil 9 is connected once through a high-voltage conductor 2 The terminal block 1 and the high-voltage conductor 2 are arranged in the insulating sleeve 3 , and the primary terminal block 1 extends out of the insulating sleeve 3 .

The transformer part B includes a transformer core 14 , a transformer low-voltage shield 15 and a transformer high-voltage coil 16 , and the transformer low-voltage shield 15 is covered on the transformer core 14 .

The high-voltage coil 9 of the transformer part A and the transformer high-voltage coil 16 of the transformer part B are connected in parallel by the primary winding 17, and the wiring diagram is shown in FIG. 2 .

The lower part of the insulating sleeve 3 is provided with a voltage equalizing shielding cylinder 4 .

In the utility model, the transformer part and the mutual inductor part are combined in a pressure vessel, and the primary winding is connected in parallel and led out through an insulating bushing. Since the transformer and the transformer are connected in parallel, they have independent iron cores, they will not affect each other during operation, and at the same time meet their respective performance requirements, and have the power supply function and all the functions of the voltage transformer.

Claims (7)

1. a modular power supply type voltage transformer, comprises pressure vessel (12), it is characterized in that: on described pressure vessel (12), arrange insulating sleeve (3), in pressure vessel (12) and insulating sleeve (3), adopt SF ₆gas (5) is as dielectric; In described pressure vessel (12), install transformer portion (A) and instrument transformer part (B), transformer portion (A) and instrument transformer part (B) are connected in parallel by a winding (17).

2. modular power supply type voltage transformer as claimed in claim 1, it is characterized in that: described transformer portion (A) comprises iron core (8), high-tension coil (9), low-voltage coil (10) and low pressure radome (11), low pressure radome (11) is arranged between low-voltage coil (10) and iron core (8); Described instrument transformer part (B) comprises transformer iron core (14), instrument transformer low pressure radome (15) and instrument transformer high-tension coil (16), and instrument transformer low pressure radome (15) is located on transformer iron core (14).

3. modular power supply type voltage transformer as claimed in claim 2, it is characterized in that: described high-tension coil (9) connects primary connection row (1) by high-pressure conductor (2), high-pressure conductor (2) is arranged in insulating sleeve (3), and it is outside that primary connection row (1) stretches out insulating sleeve (3).

4. modular power supply type voltage transformer as claimed in claim 2, is characterized in that: the high-tension coil (9) of described transformer portion (A) and the instrument transformer high-tension coil (16) of instrument transformer part (B) are connected in parallel by a winding (17).

5. modular power supply type voltage transformer as claimed in claim 1, is characterized in that: install explosion-protection equipment (13) in the bottom of described pressure vessel (12).

6. modular power supply type voltage transformer as claimed in claim 1, is characterized in that: install secondary terminals case (7) in described pressure vessel (12) outside, packing density relay (6) in secondary terminals case (7).

7. modular power supply type voltage transformer as claimed in claim 1, is characterized in that: arrange in the bottom of described insulating sleeve (3) and all press shielding cylinder (4).