CN208093914U - A kind of connector for realizing CT secondary side automatic short circuit functions - Google Patents

Abstract

The utility model provides a connector for realizing the automatic short-circuit function of the CT secondary side. By setting a contactable or detachable short-connection piece between the two insertion pieces used to connect the CT secondary side, it is convenient for debugging. When overhauling the power distribution instrument with current measurement function, quickly realize the short circuit of the secondary side of the CT in the power distribution system, and then remove the instrument; specifically include the plug substrate, and the first inserts parallel to each other are arranged on the plug substrate and the second insert; a slide bar is provided between the first insert and the second insert, and the slide bar penetrates through the plug substrate and is slidably fitted with the plug substrate, between the first insert and the second insert A shorting piece is provided, and the two ends of the shorting piece are respectively in contact with the terminal of the first insertion piece and the terminal of the second insertion piece, and one end of the slide bar is fixedly connected with the shorting piece; A return spring is covered, and one end of the return spring is fixedly connected with the end of the slide bar, and the other end of the return spring is in contact with the plug substrate.

Description

A connector used to realize the automatic short circuit function of CT secondary side

technical field

The utility model relates to a power line protection device, in particular to a connector for realizing the automatic short circuit function of a CT secondary side.

Background technique

In power transmission and distribution systems, current transformers (CTs) are commonly used to measure system current. Due to the physical characteristics of the current transformer, when the output of the secondary side of the CT is open, it will cause high voltage on the secondary side, causing personal injury and burning the CT. Therefore, when debugging and overhauling the power distribution instrument with current measurement function, it is strictly required to short-circuit the secondary side of the CT in the system first, and then remove the instrument. If the operator negligently removes the instrument directly, it will cause equipment and personnel damage. During the debugging process in strict accordance with the operating procedures, frequent short-circuiting of the secondary output of the CT will cause a decrease in efficiency.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a connector for realizing the automatic short circuit function of the secondary side of the CT, by setting a contactable or separable contact between the two inserts used to connect the secondary side of the CT Short-circuiting piece, so as to realize the automatic short-circuiting function of the CT secondary side when using a current transformer (CT) to measure the power transmission and distribution system; it is convenient to quickly realize the power distribution system when debugging and repairing the power distribution instrument with the current measurement function Short circuit the secondary side of the CT, and then remove the meter.

A connector for realizing the automatic short-circuiting function of the secondary side of a CT, comprising a plug substrate, on which a first insertion piece and a second insertion piece parallel to each other are penetratingly arranged, and it is characterized in that: the first insertion piece The terminal of one insert is used to connect the first terminal of the secondary side of the CT, and the terminal of the second insert is used to connect the second terminal of the secondary side of the CT; in the first insert There is a sliding bar between the second inserting piece, and the sliding bar is arranged through the plug base plate and is slidably fitted with the plug base plate, and a short The two ends of the shorting piece are respectively in contact with the terminal of the first insert and the terminal of the second inserting piece, and one end of the sliding bar is fixedly connected with the shorting piece; Both ends are covered with return springs, one end of the return spring is fixedly connected to the end of the slide bar, and the other end of the return spring is in contact with the plug substrate.

The principle of the utility model: the first insert and the second insert are respectively connected to the two terminals on the secondary side of the CT through the first wire and the second wire in one-to-one correspondence. Before the first insert and the second insert are inserted into the socket on the instrument, the shorting link is stabilized between the first insert and the second insert by the return spring, and the two ends of the short link are respectively Contact with the terminals of the first insert and the second insert, thereby shorting the CT secondary side;

When the first insertion piece and the second insertion piece are to be inserted into the socket installed on the instrument, the shell of the socket pushes up the slide bar, the return spring at the outer end of the slide bar is compressed, and the return spring at the inner end of the slide bar The bit spring is opened, and the slide bar pushes up the shorting piece, so that the shorting piece is separated from the first piece and the second piece, so that the secondary side of the CT, that is, the output side, is connected to the test through the contact between the piece and the jack. In the instrument, the measurement function is realized;

In addition, when the first insertion piece and the second insertion piece are pulled out, the slide bar slowly stretches out under the action of the two return springs, driving the shorting piece to slowly approach the first insertion piece and the second insertion piece. Before the insertion piece is separated from the jack, the two ends of the shorting piece are in contact with the inner sides of the terminals of the first insertion piece and the second insertion piece respectively, so as to realize the short connection.

In order to better realize the utility model, it may further be: the shorting piece is in the shape of a door, the opening of the shorting piece faces the plug substrate, and a semicircular shape is integrated on the outer sides of both ends of the shorting piece. The protrusions respectively abut against the inner sides of the terminals of the first insert and the second insert; the end of the slide bar is fixedly connected with the middle part of the shorting link.

In order to better realize the utility model, it may be further that: the first insertion piece and the second insertion piece are both strip-shaped insertion pieces.

Beneficial effects of the utility model: the CT secondary side wiring is set as a plug, and the two inserts on the plug substrate are contacted or separated through the shorting piece, thereby realizing the function of the CT secondary side automatic short circuit, and the principle is simple Easy to implement; a slide bar is set on the plug base plate, and the slide bar slides on the plug base plate through the return spring, so that the shorting piece is driven to move under the action of the external force and the return spring, so as to realize the contact or separation between the shorting piece and the insertion piece. The structure is simple and easy to operate, and the production cost is low; through this scheme, when debugging and repairing the power distribution instrument with current measurement function, the secondary side of the CT in the power distribution system can be short-circuited quickly, and then the instrument can be removed to improve work efficiency and safety in operation.

Description of drawings

Fig. 1 is a perspective view of the utility model.

1. Plug substrate; 21. First insert; 22. Second insert; 3. Shorting piece; 31. Protrusion; 41/42. Return spring; 5. Slider.

Detailed ways

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

As shown in FIG. 1 , a connector for realizing the automatic short-circuit function of the secondary side of CT includes a plug base plate 1 , and a first insertion piece 21 and a second insertion piece 21 parallel to each other are arranged through the plug base plate 1 . piece 22, the first insertion piece 21 and the second insertion piece 22 are strip-shaped insertion pieces, the terminal of the first insertion piece 21 is used to connect the first terminal of the CT secondary side, the second The terminal of the two inserts 22 is used to connect the second terminal of the secondary side of the CT; a slide bar 5 is provided between the first insert 21 and the second insert 22, and the slide bar 5 runs through It is arranged on the plug base plate 1 and is slidably matched with the plug base plate 1. A shorting piece 3 is provided between the first insertion piece 21 and the second insertion piece 22. Both ends of the shorting piece 3 Contact with the terminals of the first insert 21 and the second insert 22 respectively, one end of the slide bar 5 is fixedly connected with the short link 3; both ends of the slide bar 5 are sleeved There are return springs 41, 42, one end of the return springs 41, 42 is fixedly connected to the end of the slide bar 5, and the other end of the return springs 41, 42 is in contact with the plug substrate 1 ;

Wherein, the shorting piece 3 is in the shape of a door, the opening of the shorting piece 3 faces the plug substrate 1, and semicircular bumps 31 are integrated on the outer sides of both ends of the shorting piece 3, so that The protrusions 31 abut against the insides of the terminals of the first insertion piece 21 and the second insertion piece 22 respectively;

The principle of the utility model: the first inserting piece 21 and the second inserting piece 22 are respectively connected to the two lines output by the secondary side of the CT through the first wire and the second wire in one-to-one correspondence. Before the first insertion piece 21 and the second insertion piece 22 are not inserted into the socket on the instrument, the shorting piece 3 is stabilized between the first insertion piece 21 and the second insertion piece 22 by return springs 41, 42, and Make the protrusions 31 at both ends of the shorting piece 3 contact with the inner side of the terminal end of the first inserting piece and the second inserting piece respectively, thereby short-circuiting the first electric wire and the second electric wire;

When the first insertion piece 21 and the second insertion piece 22 were to be inserted into the socket installed on the instrument, the housing of the socket pushed up the slide bar 5, and the return spring 42 at the outer end of the slide bar 5 was compressed, and the slide bar 5 The return spring 42 at the inner end opens, and the slide bar 5 pushes up the shorting piece 3, so that the protrusion 31 of the shorting piece 3 is separated from the first inserting piece 21 and the second inserting piece 22, so that the secondary of CT The output side is connected to the test instrument through the contact between the insert and the jack to realize the measurement function;

In addition, when the first insertion piece 21 and the second insertion piece 22 are pulled out, the slide bar 5 slowly stretches out under the action of the two return springs, driving the shorting piece to slowly approach the first insertion piece 21 and the second insertion piece. Inserting piece 22, before the inserting piece is separated from the jack, the two ends of the shorting piece 3 are respectively in contact with the inner sides of the terminal ends of the first inserting piece 21 and the second inserting piece 22 to realize short-circuiting.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. A connector for realizing the automatic short-circuiting function of the CT secondary side, comprising a plug substrate, on which a first insertion piece and a second insertion piece parallel to each other are penetratingly arranged, and it is characterized in that: the The terminal of the first insert is used to connect the first terminal of the secondary side of the CT, and the terminal of the second insert is used to connect the second terminal of the secondary side of the CT; A slide bar is provided between the insert piece and the second insert piece, and the slide bar is arranged through the plug base plate and is slidably fitted with the plug base plate, and a slide bar is provided between the first insert piece and the second insert piece. There is a shorting piece, the two ends of the shorting piece are respectively in contact with the terminal of the first insertion piece and the terminal of the second insertion piece, and one end of the slider is fixedly connected with the shorting piece; Both ends of the rod are covered with return springs, one end of the return spring is fixedly connected to the end of the slide bar, and the other end of the return spring is in contact with the plug substrate. 2. A connector for realizing the automatic short-circuit function of the CT secondary side according to claim 1, characterized in that: the short-circuit piece is in the shape of a door, and the opening of the short-circuit piece faces the The plug base plate is integrally provided with semicircular bumps on the outer sides of both ends of the shorting piece, and the bumps are respectively abutted against the inner sides of the terminal ends of the first plug piece and the second plug piece; The end of the slide bar is fixedly connected with the middle part of the short link. 3. A connector for realizing the automatic short-circuit function of CT secondary side according to claim 1 or 2, characterized in that: the first insert and the second insert are long strip inserts .