CN201673778U

CN201673778U - Multifunctional testing transformer

Info

Publication number: CN201673778U
Application number: CN2010201630161U
Authority: CN
Inventors: 张晓峰; 李德家; 郑运洪; 季华峰; ***松
Original assignee: Wuhan Yiye Machinery & Electronic Engineering Co Ltd
Current assignee: Wuhan Yiye Machinery & Electronic Engineering Co Ltd
Priority date: 2010-04-13
Filing date: 2010-04-13
Publication date: 2010-12-15
Anticipated expiration: 2020-04-13

Abstract

The utility model provides a multifunctional testing transformer which is characterized in that: the multifunctional testing transformer comprises an iron core, an input winding, a measuring winding, a intermediate-pressure winding, a supercharging winding and a series winding; wherein the input winding and the measuring winding are provided at one end of the iron core, and the intermediate-pressure winding, the supercharging winding and the series winding are provided at the other end of the iron core; a low-pressure end of the intermediate-pressure winding is grounded; a high-pressure end of the intermediate-pressure winding is welded with the low-pressure end of the supercharging winding in series; and a high-pressure end of the supercharging winding is welded with the low-pressure end of the series winding in series. The multifunctional testing transformer can simultaneously satisfy the connection test of electrical devices with different capacities and different voltage grades. The multifunctional testing transformer further has the following advantages: convenient and simple operation, small weight of the whole device, high convenience and high practicability.

Description

The multifunction test transformer

Technical field

The utility model relates to a kind of electric equipment commissioning test device.

Background technology

In the commissioning test of metallurgical construction engineering electric equipment, in order to guarantee that electric equipment safety puts into operation in the middle and high pressure power supply-distribution system, carry out the dielectric voltage withstand test according to high-tension electricity equipment such as GB GB50150-2006 regulation reply high-tension switch cabinet, GIS, high-tension motor, generating set, power transformer, instrument transformers.

Dielectric voltage withstand test is divided into two kinds of DC voltage withstand test and AC voltage withstand test.For 35kV and following high-tension electricity distribution system, in the metallurgical construction construction, utilize testing transformer to carry out the commissioning test of the said equipment usually.Yet, the electric equipment of different capabilities, different electric pressures, when carrying out commissioning test, use same experimental rig often can not satisfy test requirements document, and will bring multiple troubles such as construction cost, equipment control, onsite moving to unit in charge of construction according to the different experimental rig of test needs configuration.

The utility model content

The technical problems to be solved in the utility model is: a kind of multifunction test transformer is provided, can carries out directly that motor is withstand voltage, tandem is withstand voltage and DC voltage withstand test, with the commissioning test requirement of the electric equipment that satisfies different capabilities, different electric pressures simultaneously.

The utility model is to solve the problems of the technologies described above the technical scheme of being taked to be: the multifunction test transformer is characterized in that: it comprises iron core, input winding, measures winding, middle pressure winding, supercharging winding and series excitation winding; Wherein import winding and measure the end that winding is located at iron core, middle pressure winding, supercharging winding and series excitation winding are located at the other end of iron core; The middle low-pressure end ground connection of pressing winding; In press the welding of connecting with the low-pressure end of supercharging winding of the high-pressure side of winding; The welding of connecting with the low-pressure end of series excitation winding of the high-pressure side of supercharging winding.

Press such scheme, the enamelled wire turn ratio of described input winding, measurement winding, middle pressure winding, supercharging winding and series excitation winding is 2: 1: 160: 338: 2.

Press such scheme, the enamelled wire number of turn of described measurement winding is 84 circles.

Press such scheme, the enamelled wire line footpath Φ 2.26mm of described input winding.

Press such scheme, the enamelled wire line footpath Φ 2.26mm of described measurement winding.

Press such scheme, the described middle enamelled wire line footpath Φ 0.31mm that presses winding.

Press such scheme, the enamelled wire line footpath Φ 0.15mm of described supercharging winding.

Press such scheme, the enamelled wire line footpath Φ 1.8mm of described series excitation winding.

The course of work of the present utility model is: input winding and operation control box link; Middle combination formation high pressure winding of pressing winding and supercharging winding is selected not collinear footpath for control device weight, satisfies the test requirements document of the tested thing of different capabilities, different electric pressures simultaneously.

The beneficial effects of the utility model are: 1, satisfy the commissioning test of the electric equipment of different capabilities, different electric pressures simultaneously; 2, convenient and simple for operation; 3, whole installation weight is light, and is convenient and practical.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment

Fig. 2 is a motor AC voltage withstand test schematic diagram

Fig. 3 is electric equipment DC voltage withstand test schematic diagrams such as power cable

Fig. 4 is a series excitation test connection schematic diagram

Embodiment

Fig. 1 is a structural representation of the present utility model, and it comprises iron core T, input winding L 1, measures winding L 2, middle pressure winding L 3, supercharging winding L 4 and series excitation winding L 5; Wherein import winding L 1 and measure the end that winding L 2 is located at iron core, middle pressure winding L 3, supercharging winding L 4 and series excitation winding L 5 are located at the other end of iron core; The middle low-pressure end ground connection of pressing winding L 3; In press the welding of connecting with the low-pressure end of supercharging winding L 4 of the high-pressure side of winding L 3; The welding of connecting with the low-pressure end of series excitation winding L 5 of the high-pressure side of supercharging winding L 4.Wherein said iron core T is a rectangle.

The input winding directly is that Φ 2.26 numbers of turn are that the enamelled wire coiling of 168 circles forms by line, and input voltage is 0～200V; Measuring winding directly is that Φ 2.26 numbers of turn are that the enamelled wire coiling of 84 circles forms by line, and output voltage is 0～100V; In to press winding directly be that Φ 0.31 number of turn is that the enamelled wire coiling of 13440 circles forms by line, output voltage is 16kV, capacity is 6kVA; The supercharging winding directly is that Φ 0.15 number of turn is that the enamelled wire coiling of 28392 circles forms by line, constitutes the high pressure winding with middle pressure winding, and high pressure winding output voltage is 50kV, and capacity is 6kVA; The series excitation winding directly is that Φ 1.8 numbers of turn are that the enamelled wire coiling of 168 circles forms by line, and series welding is connected on the 50kV/6kVA high pressure winding, with the potential difference of high pressure winding be 200V.

Fig. 2 is a motor AC voltage withstand test schematic diagram, and when directly carrying out the AC voltage withstand test of motor, generator, the voltage output end of operation control box CZ links to each other with input winding L 1, and the voltage measurement end of operation control box links to each other with measurement winding L 2; The high-pressure side of middle pressure winding L 3 is connected to an end of the first current-limiting protection resistance R 1, and the other end of current-limiting protection resistance R is connected on the winding of motor M, middle pressure winding low-pressure end ground connection.

Fig. 3 is electric equipment DC voltage withstand test schematic diagrams such as power cable, and when carrying out the DC voltage withstand test of electric equipment, the voltage output end of operation control box CZ links to each other with input winding L 1, and the voltage measurement end of operation control box links to each other with measurement winding L 2; The high-pressure side of supercharging winding is connected to the negative pole of silicon stack G; the positive pole of silicon stack G links to each other with an end of the second current-limiting protection resistance R 2; the other end of the second current-limiting protection resistance R 2 links to each other with the negative pole of microammeter A, and the positive pole of microammeter A is connected on the tested thing S, high pressure winding low-pressure end ground connection.

Fig. 4 is a series excitation test connection schematic diagram, and when carrying out the tandem AC voltage withstand test of electric equipment, the voltage output end of operation control box CZ links to each other with input winding L 1, and the voltage measurement end of operation control box links to each other with the secondary side of voltage divider FYQ; The high-pressure side of series excitation winding L 5 is connected to the high-pressure side of the input winding l1 of second level testing transformer T2, and series excitation winding low-pressure end is connected to the low-pressure end of second level testing transformer T2 input winding l1; The middle low-pressure end of winding L 3 of pressing is connected and ground connection with the low-pressure end of measuring winding L 2; The input winding l1 high-pressure side of second level testing transformer T2 links to each other with low-pressure end and the shell of the high pressure winding l3 of the low-pressure end of the measurement winding l2 of T2, T2 respectively; The high-pressure side of the high pressure winding l3 of T2 links to each other with the 3rd current-limiting protection resistance R 3 one ends, and the other end of current-limiting protection resistance R 3 links to each other with tested thing S with the high-pressure side of voltage divider FYQ respectively; The low-pressure end ground connection of voltage divider FYQ.Second level testing transformer T2 is placed on the insulating support EJ, and model is 5kV/3kVA.

Claims

1. multifunction test transformer is characterized in that: it comprises iron core, input winding, measures winding, middle pressure winding, supercharging winding and series excitation winding; Wherein import winding and measure the end that winding is located at iron core, middle pressure winding, supercharging winding and series excitation winding are located at the other end of iron core; The middle low-pressure end ground connection of pressing winding; In press the welding of connecting with the low-pressure end of supercharging winding of the high-pressure side of winding; The welding of connecting with the low-pressure end of series excitation winding of the high-pressure side of supercharging winding.

2. multifunction test transformer according to claim 1 is characterized in that: the enamelled wire turn ratio of described input winding, measurement winding, middle pressure winding, supercharging winding and series excitation winding is 2: 1: 160: 338: 2.

3. multifunction test transformer according to claim 2 is characterized in that: the enamelled wire number of turn of described measurement winding is 84 circles.

4. multifunction test transformer according to claim 3 is characterized in that: the enamelled wire line footpath Φ 2.26mm of described input winding.

5. multifunction test transformer according to claim 3 is characterized in that: the enamelled wire line footpath Φ 2.26mm of described measurement winding.

6. multifunction test transformer according to claim 3 is characterized in that: the enamelled wire line footpath Φ 0.31mm that presses winding in described.

7. multifunction test transformer according to claim 3 is characterized in that: the enamelled wire line footpath Φ 0.15mm of described supercharging winding.

8. multifunction test transformer according to claim 3 is characterized in that: described series excitation winding wire diameter Φ 1.8mm.