CN215449445U

CN215449445U - Testing device for CT secondary side overvoltage protection device

Info

Publication number: CN215449445U
Application number: CN202121262023.1U
Authority: CN
Inventors: 华锡琪; 蒋莹; 徐建荣
Original assignee: Wuxi Longcheng Electric Manufacturing Co ltd
Current assignee: Wuxi Longcheng Electric Manufacturing Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-01-07
Anticipated expiration: 2031-06-07

Abstract

The utility model discloses a testing device for a CT secondary side overvoltage protection device, which comprises a device main body, a tension rod and a clamp, wherein the device main body is connected with a protective cover, a slot is formed in the device main body, a connecting column penetrates through a magnet, a contact head is arranged below the connecting column, a torsion shaft is arranged in the device main body, a first winding disc is arranged on the torsion shaft, a clamping plate is arranged on the sliding groove, a first spring is arranged behind the clamping plate, a threaded rod is arranged on a limiting groove, the tension rod is arranged on the threaded rod, and the clamp is arranged on the top surface in the protective cover. This CT secondary side is testing arrangement for overvoltage protection device is provided with magnet, contact and insulating cover, and the accessible is held insulating cover on the fixed head and is inhaled magnet and be connected with the junction magnetism with magnet on the fixed head to carry out current and voltage's conduction through the contact, this kind of mode prevents that the junction from being in sunken inconvenient prior art through the clip centre gripping.

Description

Testing device for CT secondary side overvoltage protection device

Technical Field

The utility model relates to the technical field of secondary side overvoltage protector testing, in particular to a testing device for a CT secondary side overvoltage protection device.

Background

In an electric power system, a current transformer applies measurement and control of primary current, the secondary side of the transformer is in an approximate short-circuit state during normal work, and output voltage is very low. In operation, if the secondary winding is open or abnormal current flows through the primary winding, overvoltage of thousands of volts or even tens of thousands of volts is generated on the secondary side. The insulation of a secondary system is damaged, the mutual inductor is burnt due to overexcitation, and even the life safety of operating personnel is endangered. The action speed is fast, the overload capacity is strong, the static leakage current is small, and the requirements of various CT protection can be met.

Need detect it and test in CT secondary side overvoltage protector use to guarantee that it can normal operating, but the device that has now to CT secondary side overvoltage protector detection and test on the market has can't satisfy people's demand at present, partial CT secondary side overvoltage protector's junction is in sunken state among the prior art, can cause the inconvenience when connecting like this, and testing arrangement can appear the pencil when using and influence normal work efficiency in a jumble. Therefore, we propose a testing device for a secondary side overvoltage protection device of a CT so as to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a testing device for a CT secondary side overvoltage protection device, which aims to solve the problems that in the prior art, the connection position of a part of CT secondary side overvoltage protectors is in a concave state, which causes inconvenience in connection, and the wiring harnesses are disordered to influence normal working efficiency when the testing device is used.

In order to achieve the purpose, the utility model provides the following technical scheme: a testing device for a CT secondary side overvoltage protection device comprises a device main body, a tension rod and a clamp, wherein a protective cover is connected to the device main body, a slot is formed in the device main body, a connecting wire is installed on the slot, the other end of the connecting wire is connected with a fixing head, an insulating sleeve is wrapped outside the fixing head, a magnet is installed inside the fixing head, a connecting column penetrates through the magnet, a contact head is arranged below the connecting column, a torsion shaft is installed inside the device main body, a first winding disc is arranged on the torsion shaft, an external power line is installed on the first winding disc, a sliding groove is installed on the side face of the device main body, a clamping plate is arranged on the sliding groove, a first spring is installed behind the clamping plate, a pull ring is connected to the clamping plate, a second spring is arranged inside the sliding groove, a buckle is installed on the second spring, and a second winding disc is arranged on the protective cover, and the inside top surface of protective cover installs the spacing groove, be provided with the threaded rod on the spacing groove, and install the tight pole that rises on the threaded rod, the inside top surface of protective cover is provided with anchor clamps.

Preferably, the connection mode between the connection line and the slot is detachable connection, and the fixing head is connected with the slot through the connection line.

Preferably, the contact head is connected with the connecting wire through the connecting column, and the fixing head is fixed through being connected with the clamp in a clamping manner.

Preferably, the first winding disc forms a torsion mechanism through a torsion shaft, and the connection mode between the sliding groove and the external power line is through connection.

Preferably, splint constitute elastic construction through first spring, and splint are sliding connection inside the spout to splint are spacing mutually through being connected with the buckle block.

Preferably, the connection mode between the tension rod and the threaded rod is threaded connection, and a vertical relation is formed between the central axis of the tension rod and the top surface of the inner portion of the protective cover.

Compared with the prior art, the utility model has the beneficial effects that: this CT secondary side overvoltage protection device uses testing arrangement:

(1) the magnet, the contact head and the insulating sleeve are arranged, the magnet on the fixing head can be connected with the connecting part in a magnetic attraction mode by holding the insulating sleeve on the fixing head, and current and voltage are conducted through the contact head, so that the connecting part is prevented from being sunken and inconvenient to clamp through a clamp in the prior art, and the device is more practical;

(2) be provided with first rolling dish and second rolling dish, the first rolling dish of accessible twists reverse and carry out the rolling with external power source line and accomodate to the accessible is fixed the connecting wire winding on the second rolling dish, makes things convenient for next use, makes work efficiency obtain the promotion.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is a partial cross-sectional structural view of the main body of the present invention;

FIG. 3 is a schematic side view of the present invention;

FIG. 4 is a schematic cross-sectional view of a retaining head according to the present invention;

FIG. 5 is a schematic view of the structure at A in FIG. 1 according to the present invention;

FIG. 6 is a schematic view of the structure of FIG. 3 at B according to the present invention.

In the figure: 1. a device main body; 2. a protective cover; 3. a slot; 4. a connecting wire; 5. a fixed head; 6. an insulating sleeve; 7. a magnet; 8. connecting columns; 9. a contact head; 10. a torsion shaft; 11. a first winding tray; 12. connecting a power line externally; 13. a chute; 14. a splint; 15. a first spring; 16. a pull ring; 17. a second spring; 18. buckling; 19. a second winding disc; 20. a limiting groove; 21. a threaded rod; 22. a tension rod; 23. and (4) clamping.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a testing device for a CT secondary side overvoltage protection device comprises a device main body 1, a protective cover 2, a slot 3, a connecting wire 4, a fixed head 5, an insulating sleeve 6, a magnet 7, a connecting post 8, a contact head 9, a torsion shaft 10, a first winding disc 11, an external power wire 12, a sliding chute 13, a clamping plate 14, a first spring 15, a pull ring 16, a second spring 17, a buckle 18, a second winding disc 19, a limiting groove 20, a threaded rod 21, a tension rod 22 and a clamp 23, wherein the device main body 1 is connected with the protective cover 2, the device main body 1 is provided with the slot 3, the slot 3 is provided with the connecting wire 4, the other end of the connecting wire 4 is connected with the fixed head 5, the outer side of the fixed head 5 is wrapped with the insulating sleeve 6, the magnet 7 is arranged inside the fixed head 5, the connecting post 8 penetrates through the magnet 7, the contact head 9 is arranged below the connecting post 8, the torsion shaft 10 is arranged inside the device main body 1, and seted up first rolling dish 11 on the torsion shaft 10, install external power cord 12 on the first rolling dish 11, and install 1 side-mounting of device main part has spout 13, be provided with splint 14 on the spout 13, and splint 14 rear portion installs first spring 15, be connected with pull ring 16 on the splint 14, and the inside second spring 17 that is provided with of spout 13, install buckle 18 on the second spring 17, be provided with second rolling dish 19 on the protective cover 2, and the inside top surface of protective cover 2 installs spacing groove 20, be provided with threaded rod 21 on the spacing groove 20, and install tension rod 22 on the threaded rod 21, the inside top surface of protective cover 2 is provided with anchor clamps 23.

The connection mode between connecting wire 4 and the slot 3 is for dismantling the connection, and fixed head 5 is connected with slot 3 through connecting wire 4 to the function of convenient change and conduction is realized, makes the device more reasonable.

Contact 9 is connected with connecting wire 4 through spliced pole 8, and fixed head 5 is connected mutually through being connected with anchor clamps 23 block and is fixed, convenient storage makes the more practical of device.

First rolling dish 11 constitutes torsion mechanism through torsion axle 10, and the connected mode between spout 13 and the external power supply line 12 is through connection, can carry out the rolling to external power supply line 12 and accomodate for the device is more reasonable.

Splint 14 constitutes elastic structure through first spring 15, and splint 14 is sliding connection inside spout 13 to splint 14 is spacing mutually through being connected with buckle 18 block, can carry out the centre gripping to external power supply line 12 and fix, realizes the location to length.

The connecting mode between the tension rod 22 and the threaded rod 21 is threaded connection, and the central axis of the tension rod 22 and the inner top surface of the protective cover 2 are in a vertical relation, so that the connection line 4 is prevented from being broken due to looseness, and the device is not convenient to use next time, and is more stable.

The working principle is as follows: when the testing device for the secondary side overvoltage protection device of the CT is used, firstly, the protective cover 2 is opened, the fixing head 5 is taken down from the clamp 23, then the connecting wire 4 is taken down from the second winding disc 19 for standby, then the external power supply wire 12 is pulled to take down the connecting power supply from the first winding disc 11, the second spring 17 below the buckle 18 is compressed by the pulling pull ring 16 to shrink inwards, and then the external power supply wire 12 is clamped and fixed by the clamping plate 14 to slide in the sliding groove 13 through the pushing of the first spring 15.

Then place the position that needs detected with contact 9 on the fixed head 5, and it is fixed to inhale the connection through magnet 7 magnetism simultaneously, later detect and measure, detect afterwards and take off fixed head 5 after accomplishing, and twine connecting wire 4 on second rolling dish 19 and tight pole 22 that rises, fixed head 5 then the block advances anchor clamps 23 and fixes, later rotatory threaded rod 21 and tight pole 22 threaded connection that rises, thereby realize sliding on spacing groove 20 and rise tightly connecting wire 4, at last pulling pull ring 16, make splint 14 be located buckle 18 rear and fix, and pull out external power cord 12 and twist reverse first rolling dish 11 through torsion shaft 10 and accomodate external power cord 12, this is exactly whole work flow. And those not described in detail in this specification are well within the skill of those in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a CT secondary side is testing arrangement for overvoltage protection device, includes device main part (1), tight pole (22) and anchor clamps (23) that rises, its characterized in that: the device is characterized in that a protective cover (2) is connected onto the device body (1), a slot (3) is formed in the device body (1), a connecting wire (4) is installed on the slot (3), the other end of the connecting wire (4) is connected with a fixing head (5), an insulating sleeve (6) wraps the outer side of the fixing head (5), a magnet (7) is installed inside the fixing head (5), a connecting column (8) penetrates through the magnet (7), a contact head (9) is arranged below the connecting column (8), a torsion shaft (10) is installed inside the device body (1), a first winding disc (11) is arranged on the torsion shaft (10), an external power supply wire (12) is installed on the first winding disc (11), a sliding groove (13) is installed on the side face of the device body (1), a clamping plate (14) is arranged on the sliding groove (13), and a first spring (15) is installed on the rear side face of the clamping plate (14), be connected with pull ring (16) on splint (14), and inside second spring (17) that is provided with of spout (13), install buckle (18) on second spring (17), be provided with second rolling dish (19) on protective cover (2), and protective cover (2) inside top surface installs spacing groove (20), be provided with threaded rod (21) on spacing groove (20), and install tight pole (22) that rises on threaded rod (21), the inside top surface of protective cover (2) is provided with anchor clamps (23).

2. The testing device for the secondary side overvoltage protection device of the CT according to claim 1, wherein: the connecting mode between connecting wire (4) and slot (3) is for dismantling the connection, and fixed head (5) are connected with slot (3) through connecting wire (4).

3. The testing device for the secondary side overvoltage protection device of the CT according to claim 1, wherein: the contact head (9) is connected with the connecting wire (4) through the connecting column (8), and the fixing head (5) is fixed through clamping connection with the clamp (23).

4. The testing device for the secondary side overvoltage protection device of the CT according to claim 1, wherein: the first winding disc (11) forms a torsion mechanism through a torsion shaft (10), and the connection mode between the sliding groove (13) and the external power line (12) is through connection.

5. The testing device for the secondary side overvoltage protection device of the CT according to claim 1, wherein: the clamping plate (14) forms an elastic structure through the first spring (15), the clamping plate (14) is in sliding connection inside the sliding groove (13), and the clamping plate (14) is limited through clamping connection with the buckle (18).

6. The testing device for the secondary side overvoltage protection device of the CT according to claim 1, wherein: the connecting mode between tight pole (22) and threaded rod (21) rises is threaded connection, and is the vertical relation between the axis of tight pole (22) and the inside top surface of protective cover (2).