CN206353174U

CN206353174U - A kind of furnace transformer secondary current test device

Info

Publication number: CN206353174U
Application number: CN201720028511.3U
Authority: CN
Inventors: 师强周; 梁霞; 沙静; 王利军
Original assignee: JINGZHOU JIANGLING SHENDA ELECTRIC Co Ltd
Current assignee: JINGZHOU JIANGLING SHENDA ELECTRIC Co Ltd
Priority date: 2017-01-11
Filing date: 2017-01-11
Publication date: 2017-07-25
Anticipated expiration: 2027-01-11

Abstract

The utility model is related to transformer technology field, especially a kind of furnace transformer secondary current test device, including three current transformers, three current transformers are separately mounted at the every phase connection in furnace transformer high-pressure side, three current transformers interconnect, the terminals of the current transformer are respectively connected in continous way contact plate, also access has adjustable transformer in the continous way contact plate, the secondary terminals of the adjustable transformer are connected with isolation transformer, the adjustable transformer leading-out terminal is connected with outside display instrument, the furnace transformer secondary current test device is greatly improved when furnace transformer is smelted in terms of the measurement of electrode current, measurement to tens of thousands of amperes of high currents of electrode current, accuracy is greatly improved, economic benefit is obvious, the reliability of product is greatly improved, economic benefit is improved to enterprise, also there is good social benefit simultaneously.

Description

A kind of furnace transformer secondary current test device

Technical field

The utility model is related to transformer technology field, more particularly to a kind of furnace transformer secondary current test device.

Background technology

In electric furnace smeltings such as electric arc furnaces, ladle refining furnaces, electrode current is up to tens of thousands of amperes.In smelting process, electrode The size of electric current generally determines the characteristic of smelting.Many electric furnaces need coordination electrode electric current, therefore electrode in smelting process The measurement of electric current is particularly important, and electrode current is larger, measures more difficult, the method generally used at present is to utilize electric furnace Short net electric current and electrode current between transformer and electric furnace is equal, selects a conductor to install additional on the multi-channel parallel conductor of short net Current transformer, electrode current value is converted into by the current value of transformer.The error of such a method measurement is larger, because in parallel 2-3 short net, actual current has a relatively large deviation, and the current transformer cost more than 8000/5A is higher, and accuracy is poor.

Utility model content

The purpose of this utility model is the high shortcoming of cost in order to solve to exist in the prior art error greatly, and propose A kind of furnace transformer secondary current test device.

To achieve these goals, the utility model employs following technical scheme：

A kind of furnace transformer secondary current test device, including three current transformers are designed, three electric currents are mutual Sensor is separately mounted at the every phase connection in furnace transformer high-pressure side, and three current transformers interconnect, the electric current The terminals of transformer are respectively connected in continous way contact plate, and also access has adjustable transformer in the continous way contact plate, The secondary terminals of the adjustable transformer are connected with isolation transformer, and the adjustable transformer leading-out terminal shows with outside Show that instrument is connected.

It is preferred that, annularly it is provided with six hard contacts on the continous way contact plate.

It is preferred that, the electric current no-load voltage ratio of the isolation transformer is one.

The utility model proposes a kind of furnace transformer secondary current test device, beneficial effect is：By in electricity The primary side that stove voltage rises installs current transformer, and the primary side line current of furnace transformer is measured with this current transformer, Continous way contact plate, adjustable transformer and isolation transformer, the leading-out terminal and display instrument of isolation transformer are provided with simultaneously Connection, just can now read the secondary side motor current values of furnace transformer, the furnace transformer two from display instrument Primary current test device is greatly improved when furnace transformer is smelted in terms of the measurement of electrode current, tens of thousands of to electrode current The measurement of ampere high current, accuracy is greatly improved, and substantially, the reliability of product is greatly improved economic benefit, to enterprise Industry improves economic benefit, while also having good social benefit.

Brief description of the drawings

Fig. 1 be the utility model proposes a kind of furnace transformer secondary current test device circuit theory diagrams.

In figure：1 current transformer, 2 continous way contact plates, 3 adjustable transformer, 4 isolation transformers, 5 furnace transformers.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.

Reference picture 1, a kind of furnace transformer secondary current test device, including three current transformers 1, three electric currents are mutual Sensor 1 is separately mounted at the every phase connection in the high-pressure side of furnace transformer 5, and three current transformers 1 interconnect, current transformer 1 terminals are respectively connected in continous way contact plate 2, and also access has adjustable transformer 3 in continous way contact plate 2, can adjust The secondary terminals of transformer 3 are connected with isolation transformer 4, and the adjustable leading-out terminal of transformer 3 is connected with outside display instrument, Annular in shape on continous way contact plate 2 to be provided with six hard contacts, the electric current no-load voltage ratio of isolation transformer 4 is one, continous way contact Disk 2 ensure that current transformer 1 occurs without open circuit phenomenon, can effectively prevent the open-circuit voltage of current transformer 1, make electric current mutual The gear regulation of sensor 1 is synchronous with the gear regulation holding of furnace transformer 5, and adjustable mutual-inductor 3 is used to ensure electric furnace transformation The output current of the electrode current summation current transformer 1 of device 5 remains linear relationship so that tester can be according to display instrument Test data in table reads the secondary current size of furnace transformer 5, contrasts existing test device, testing cost is low, Accuracy is higher.

Operation principle：When the device body of furnace transformer 5 is assembled, current transformer 1 is first attached to the high pressure of furnace transformer 5 In outlet, then the outlet of current transformer 1 is connected in the control cabinet of the outside of furnace transformer 5, the wiring of continous way contact plate 2 with Current transformer 1 is connected, and the connecting line of continous way contact plate 2 is connected with adjustable transformer 3, can adjust the wiring of transformer 3 It is connected again with isolation transformer 4, the outlet of isolation transformer 4 is directly connected in display instrument, installation, display instrument shows What is shown is exactly the secondary side electrode current numerical value of furnace transformer 5.

It is described above, only the utility model preferably embodiment, but protection domain of the present utility model is not This is confined to, any one skilled in the art is in the technical scope that the utility model is disclosed, according to this practicality New technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility model Within enclosing.

Claims

1. a kind of furnace transformer secondary current test device, including three current transformers (1) are characterized in that, described in three Current transformer (1) is separately mounted at the every phase connection in furnace transformer (5) high-pressure side, three current transformer (1) phases Mutually it is coupled, the terminals of the current transformer (1) are respectively connected in continous way contact plate (2), the continous way contact plate (2) In also access have adjustable transformer (3), the secondary terminals of the adjustable transformer (3) are connected with isolation transformer (4), Adjustable transformer (3) leading-out terminal is connected with outside display instrument.

2. a kind of furnace transformer secondary current test device according to claim 1, it is characterised in that the continous way Annularly six hard contacts are provided with contact plate (2).

3. a kind of furnace transformer secondary current test device according to claim 1, it is characterised in that the isolation is mutual The electric current no-load voltage ratio of sensor (4) is one.