CN203606421U - Improved current transformer - Google Patents

Abstract

The utility model provides an improved current transformer comprising a casing (1), a current transformer (2), a current protection plate (3), and a pluggable integral terminal (4). The current transformer (2), the current protection plate (3), and the pluggable integral terminal (4) are disposed in the casing (1). The current protection plate (3) is connected with the current transformer (2), and the current transformer (2) is connected with the pluggable integral terminal (4). The improved current transformer is advantageous in that the measurement of the current signals can be facilitated, the on-site wiring is not required, and the operation of the on-site electrical devices cannot be affected; the structure is novel and compact, the reliability is high, the maintenance is simple, and the economical efficiency and the practicability are integrated into one body.

Description

An Improved Current Transformer

Technical field:

The utility model relates to an improved current transformer, which belongs to the field of single-item current monitoring of electric power alternating current, and can convert alternating current signals into voltage signals and provide them to a current collection unit for collection.

Background technique:

At present, the monitoring of the change of the electric AC current is a routine monitoring content of the power system. Through the change of the current, the condition of the load and the condition of the power equipment itself can be understood.

The current transformer is a device used to monitor the AC current signal. Usually, the chassis of the current transformer is often hung under the measured equipment to complete the signal conversion.

The existing current transformers have the following problems: (1) The current wiring is complicated. If multiple current detections need to be pulled through the cable trench for a long distance, it is easy to cause an accident at the end of the screen; (2) The output line of the current transformer does not support live plugging of equipment. Unplugging, thereby affecting the need for live detection of electrical equipment through the portable sampling module.

Therefore, it is very necessary to study the current transformer suitable for live detection of power equipment.

An improved current transformer has been applied in the capacitive equipment and surge arrester wireless insulation live detection project developed by us. In this project, two improved current transformers are installed under the capacitive equipment on a line nearby. One of them is An improved current transformer is installed under one capacitive device to measure the leakage current of this capacitive device, and another improved current transformer is installed under another capacitive device to measure the leakage current of this capacitive device, and the two and improved current transformers are used to measure the leakage current of this capacitive device. The portable acquisition module matching the transformer collects the leakage current of two capacitive devices and uploads them. The master station system calculates the relative dielectric loss of the devices and can understand the insulation conditions of the capacitive devices. This improved current transformer has simple wiring, convenient use, does not affect the operation of primary equipment, and has achieved good application results.

Utility model content:

The utility model provides an improved current transformer, the purpose of which is: the improved current transformer can be installed under the measured equipment nearby, and the connection with the main line on the primary side is simple; it provides a portable sampling module for live detection of electric equipment. The convenient and safe signal interface is suitable for the monitoring equipment to collect the AC signal of the equipment under test.

The technical solution provided by the utility model is: an improved current transformer, characterized in that:

The current transformer includes a chassis (1), a current transformer (2), a current protection board (3) and a pluggable integral terminal (4); the current transformer (2), a current protection board (3) and a pluggable The board-type integral terminals (4) are installed inside the chassis (1); the current protection board (3) is connected to the current transformer (2); and the current transformer (2) is connected to the pluggable board-type integral terminal (4).

Preferably, the pluggable integral terminal (4) adopts a joint with a female port structure.

Preferably, the signal acquisition end of the portable sampling module adopts a pluggable integral terminal with a male structure connector.

Preferably, the pluggable overall terminal of the portable acquisition module and the pluggable integral terminal (4) fixed in the wall-mounted outdoor chassis (1) are a set of terminals, and the two are connected through a connector of a male-female pluggable structure. Connect or disconnect.

Preferably, the chassis (1) is a wall-mounted outdoor chassis, and the structure of the chassis (1) is a cuboid; its front side is a door that can be rotated around the side of the chassis (1), and the rear side of the chassis (1) Features two hooks.

Preferably, the current protection board (3) includes overcurrent and overvoltage protection elements.

Compared with the closest technical solution, the beneficial effects of the utility model are:

The utility model is applied in the capacitive equipment and lightning arrester wireless insulation live detection project developed by us. It has simple wiring, convenient use, does not affect the operation of the primary equipment, and has achieved good application effects.

It can realize the conversion of primary current signal into secondary voltage signal, which can be used by the portable sampling module matched with this chassis, and can realize the measurement of current signal conveniently without on-site wiring. collection.

The acquisition end and the primary side AC current are completely isolated and do not affect each other. It has the characteristics of novel and compact structure, high reliability, and simple maintenance. It can be widely used in the occasion of portable live monitoring of electric power equipment.

Description of drawings:

Figure 1 is a structural block diagram of an improved current transformer.

Among them: 1-chassis; 2-current transformer; 3-current protection board; 4-pluggable integral terminal.

Detailed ways:

In order to better understand the utility model, the content of the utility model is further illustrated below in conjunction with specific examples.

The specific embodiment of the utility model is shown in Figure 1. The current transformer (2), the current protection board (3) (3), and the pluggable integral terminal (4) are installed in the chassis (1), and the AC current signal First enter the current transformer (2) through the current protection board (3).

The current protection board (3) contains overcurrent and overvoltage protection components. When the AC power has overvoltage and overcurrent, the current protection board (3) can limit the current and voltage so that the subsequent circuit does not exceed the protection limit; It is required that the AC current during work cannot be broken. A bypass switch is provided on the current protection board (3). When the follow-up equipment needs to be repaired, the bypass switch is closed, and the follow-up equipment can be repaired. The bypass switch is turned on during normal work, and the AC The current signal passes through the iron core of the current transformer (2) after passing through the current protection board (3).

The output signal of the current transformer (2) is output externally through the pluggable integral terminal (4), and the pluggable integral terminal (4) adopts a connector with a female port structure; On-site, connect a channel of AC current signal to be measured, and the whole pre-installation process is completed.

When the user needs to measure the current of this line, open the chassis (1), and connect the portable acquisition module with pluggable integral terminals with male structure connectors and the pluggable acquisition module with female structure connectors in the chassis (1). The overall terminal (4) is connected. After the portable acquisition module is powered on, it communicates with the master station through wireless communication and uploads current data. After the work of the portable acquisition module is completed, power off and unplug the pluggable integral terminal. Take it out from the chassis (1), so as to complete the entire measurement work.

The above is only an embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the application pending approval. within the scope of the claims of the present utility model.

Claims (6)

1. An improved current transformer, characterized in that: The current transformer includes a chassis (1), a current transformer (2), a current protection board (3) and a pluggable integral terminal (4); the current transformer (2), a current protection board (3) and a pluggable The board-type integral terminals (4) are installed inside the chassis (1); the current protection board (3) is connected to the current transformer (2); and the current transformer (2) is connected to the pluggable board-type integral terminal (4). 2. A kind of improved current transformer as claimed in claim 1, is characterized in that: The pluggable integral terminal (4) adopts a joint with a female structure. 3. A kind of improved current transformer as claimed in claim 1, is characterized in that: The signal acquisition end of the portable sampling module adopts a pluggable integral terminal with a male structure connector. 4. A kind of improved current transformer as claimed in claim 2 or 3, is characterized in that: The pluggable integral terminal of the portable acquisition module and the pluggable integral terminal (4) fixed in the wall-mounted outdoor chassis (1) are a set of terminals, and the two are connected or disconnected through joints of a male-female plug-in structure. open. 5. A kind of improved current transformer as claimed in claim 1, is characterized in that: The cabinet (1) is a wall-mounted outdoor cabinet, and the structure of the cabinet (1) is a cuboid; its front side is a door that can be rotated around the side of the cabinet (1), and the rear side of the cabinet (1) is provided with two a hook. 6. A kind of improved current transformer as claimed in claim 1, is characterized in that: The current protection board (3) contains overcurrent and overvoltage protection elements.

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