CN116264126A - A remote switching device for transformer on-load tap changer - Google Patents

Abstract

The invention provides a remote switching device of an on-load tap changer of a transformer, which comprises a junction box and a remote controller, wherein a remote control circuit board is arranged in the junction box, the remote controller is in communication connection with the remote control circuit board, a power supply module is arranged in the junction box and is in power supply connection with the remote control circuit board, the remote control circuit board is provided with a first normally open branch and a second normally open branch, an outgoing line interface is arranged on the outer side of the junction box, the first normally open branch and the second normally open branch are electrically connected with the outgoing line interface, the outgoing line interface is connected with outgoing lines, the outgoing lines are provided with 4 outgoing terminals, and the 4 outgoing terminals are connected with 4 terminals of the on-load tap changer for upshifting and downshifting. According to the invention, the lifting gear of the on-load tap-changer is realized in a remote control switching mode, so that the characteristic test time of the on-load tap-changer is effectively shortened, and the manpower and material resources are saved.

Description

A remote switching device for transformer on-load tap changer

technical field

The invention relates to the technical field of transformers, in particular to a remote switching device for a transformer on-load tap changer.

Background technique

On-load tap changer refers to a voltage regulating device that can be switched during transformer operation and used to change the tap connection position of the transformer winding. At the transformer maintenance site, when the on-load tap-changer is inspected by hanging core, that is, after the on-load tap-changer is hoisted out of the transformer body for inspection, a characteristic test must be carried out to ensure that the tap-changer is installed well. When working on site, the staff need to run back and forth to switch the on-load tap-changer constantly, which is very time-consuming.

Contents of the invention

The invention solves the very time-consuming problem of switching the on-load tap-changer back and forth during the characteristic test, and proposes a remote switching device for the on-load tap-changer of the transformer, which realizes the up-down gear of the on-load tap-changer through remote control switching. Effectively shorten the test time of on-load tap-changer characteristics, saving manpower and material resources.

In order to achieve the above object, the following technical solutions are proposed:

A remote switching device for a transformer on-load tap changer, comprising a junction box and a remote controller, the junction box is provided with a remote control circuit board, the remote controller communicates with the remote control circuit board, and the junction box is provided with a power supply module , the power supply module is connected to the remote control circuit board for power supply, the remote control circuit board is provided with a first normal branch circuit and a second normal branch circuit, the outer side of the junction box is provided with a lead line interface, the first normal branch circuit and the The second normal branch circuit is electrically connected to the lead-out line interface, and the lead-out line interface is connected with a lead-out line. The lead-out line is provided with 4 lead-out terminals, and the 4 lead-out terminals are connected to the upshift and downshift of the on-load tap changer. 4 terminals of the file.

In the present invention, four lead-out terminals form two sub-nodes, only need to connect the two sub-nodes to the switching device of the on-load tap-changer in parallel, without considering the size of the operating mechanism box of the on-load tap-changer; Whether the device is a button type or a rotary type, in the electrical circuit, the gear adjustment is realized by the on-off of the nodes, and the electrical implementation is highly versatile. The invention realizes switching control of the on-load tap changer by controlling the on-off of the node, and the action accuracy rate is 100%. The invention realizes remote control on-off of nodes, the action accuracy rate is 100%, the node withstand voltage level is greater than 1000V, and the flow capacity is greater than 10A. The remote controller of the present invention is connected with the remote control circuit board through communication, and can be used 100% reliably within a range of 25 meters.

Preferably, the junction box is an IP68 waterproof junction box with an upper case and a lower case, the bottom of the lower case is provided with a support column, and the remote control circuit board is fixed on the support column by screws.

Preferably, the power supply module is a rechargeable battery pack, a charging interface is provided outside the junction box, one end of the charging interface is electrically connected to the rechargeable battery pack, and the other end of the charging interface is connected to an external charger. The present invention is equipped with a rechargeable battery pack, so that the remote control circuit board does not need an external power supply when used on the spot, and the use time is longer than 144 hours after one charge.

Preferably, a power display module and a power switch are arranged outside the junction box, and the power display module and power switch are electrically connected to the rechargeable battery pack. The purpose of setting the power display module and the power switch in the present invention is to facilitate on-site use.

Preferably, the model of the remote control circuit board is YPDC-2PC, and the remote control is provided with an upshift button and a downshift button. When the remote control circuit board receives a signal from pressing the upshift button, the first normally branch is closed, The on-load tap-changer is shifted up; when the remote control circuit board receives the downshift button press signal, the second normal branch circuit is closed, and the on-load tap-changer is downshifted.

Preferably, the lead-out terminal is provided with a terminal clip. In order to ensure the durable strength of the wiring leading out the nodes of the two pairs of remote control circuit boards, the present invention has four fixed wiring terminals provided with wiring clips.

Preferably, a camera and a receiver are provided, the camera is used to capture the video of the gear change of the on-load tap changer, and the receiver is used to receive the video of the gear change of the on-load tap changer. The present invention obtains the gear switching situation through the camera, does not need people to cooperate with the feedback gear switching situation, and the gear feedback accuracy rate is 100%.

Preferably, the camera is fixedly connected with a universal flexible shaft, and a strong magnet is connected at the bottom of the universal flexible shaft. In order to allow the angle of the camera to be adjusted, the present invention uses a universal flexible shaft to fix the camera, and adjusts the universal flexible shaft to change the viewing angle, and the bottom is fixed on the on-load tap changer operation box by a strong magnet.

Preferably, the junction box is provided with a receiving groove, and the receiving groove is used for clamping the universal flexible shaft and the strong magnet. The purpose of this arrangement of the present invention is to make the device easy to store and carry.

The beneficial effect of the present invention is that: the present invention realizes switching control of the on-load tap changer by controlling the on-off of the node, the action accuracy rate is 100%, realizes the remote control on-off of the node, the action accuracy rate is 100%, and effectively shortens the characteristics of the on-load tap changer. Test time, saving manpower and material resources.

Description of drawings

Fig. 1 is a cross-sectional view of an embodiment junction box;

Fig. 2 is a side view of an embodiment junction box;

Fig. 3 is the schematic diagram of embodiment remote controller;

Fig. 4 is the schematic diagram of embodiment camera;

Fig. 5 is the schematic diagram of embodiment remote control circuit board circuit;

Among them: 1. Upper shell 2, Lower shell 3, Remote control circuit board 4, Power supply module 5, Charging interface 6, Leading line interface 7, Support column 8, Screw 9, Power display module 10, Power switch 11, Upshift button 12 , downshift button 13, camera 14, universal flexible shaft 15, strong magnet 16, storage slot.

Detailed ways

Example:

This embodiment proposes a transformer on-load tap changer remote switching device, referring to Figure 1, including a junction box and a remote control, the junction box is provided with a remote control circuit board 3, the remote control and the remote control circuit board 3 communication connection, the junction box A power supply module 4 is provided, and the power supply module 4 is connected to the remote control circuit board 3 for power supply. The remote control circuit board 3 is provided with a first normal branch circuit and a second normal branch circuit. and the second normal branch circuit are electrically connected to the lead-out line interface 6, the lead-out line interface 6 is connected with a lead-out line, and the lead-out line is provided with 4 lead-out terminals, and the 4 lead-out terminals are connected to the 4 ports of the on-load tap-changer for upshifting and downshifting. terminals. The junction box is an IP68 waterproof junction box, and is provided with an upper case 1 and a lower case 2. The bottom of the lower case 2 is provided with a support column 7, and the remote control circuit board 3 is fixed on the support column 7 by screws 8. The power supply module 4 is a rechargeable battery pack, and a charging interface 5 is provided outside the junction box. One end of the charging interface 5 is electrically connected to the rechargeable battery pack, and the other end of the charging interface 5 is connected to an external charger. Referring to FIG. 2 , a power display module 9 and a power switch 10 are provided outside the junction box, and the power display module 9 and the power switch 10 are electrically connected to the rechargeable battery pack. With reference to Fig. 5, the model of the remote control circuit board 3 is YPDC-2PC. With reference to Fig. 3, the remote controller is provided with an upshift button 11 and a downshift button 12. When the remote control circuit board 3 receives the signal that the upshift button 11 is pressed, the One normally branch circuit is closed, and the on-load tap-changer is shifted up; when the remote control circuit board 3 receives the downshift button 12 pressing signal, the second normally branch circuit is closed, and the on-load tap-changer is shifted down. The lead-out terminals are provided with terminal clips. In order to ensure the durable strength of the wiring leading out the nodes of the two pairs of remote control circuit boards, the present invention has four fixed wiring terminals provided with wiring clips. Referring to Fig. 4, the present invention is also provided with a camera 13 and a receiver, the camera 13 is used to capture the video of the on-load tap changer gear change, and the receiver is used to receive the video of the on-load tap changer gear change. The camera head 13 is fixedly connected with a universal flexible shaft 14, and the bottom of the universal flexible shaft 14 is connected with a strong magnet 15. The junction box is provided with a receiving groove 16, and the receiving groove 16 is used for clamping the universal flexible shaft 14 and the strong magnet 15. Receivers of the present invention include, but are not limited to, cell phones and computers.

The invention is mainly composed of a junction box, a remote controller and an angle-adjustable camera. The junction box leads to two pairs of normally open nodes, which are used to connect to the corresponding on-load tap-changer upshift and downshift in the on-load tap-changer mechanism box. 4 terminals, the controller is used to control the on-off of the node so as to realize the upshift and downshift of the on-load tap changer. The junction box is rechargeable and has a power display function. The adjustable-angle camera is fixed on the operation box of the on-load tap-changer for feedback of the gear position of the on-load tap-changer.

When in use, connect the four lead-out clips of the junction box to the four nodes of the switching circuit of the on-load tap-changer, and fix the adjustable-angle camera at a suitable position on the operation box of the on-load tap-changer, so that the staff can remotely The upshift and downshift of the on-load tap-changer can be adjusted through the controller, and the adjustment results fed back by the adjustable-angle camera can be viewed through the APP on the mobile phone.

Generally the present invention has the following advantages:

1. Realize the node remote control on-off, the action accuracy rate is 100%, the node withstand voltage level is greater than 1000V, and the flow capacity is greater than 10A.

2. The switching control of the on-load tap changer is realized through the on-off of the control node, and the action accuracy rate is 100%.

3. The circuit board does not need an external power supply when used on site, and it can be used for more than 144 hours on one charge.

4. It can be used 100% reliably within a range of 25 meters.

5. There is no need for people to cooperate with the feedback of gear switching, and the accuracy of gear feedback is 100%.

Claims (7)

1. The utility model provides a transformer on-load tap changer remote switching device, characterized by, including terminal box and remote controller, be equipped with remote control circuit board (3) in the terminal box, remote controller and remote control circuit board (3) communication connection, be equipped with power module (4) in the terminal box, power module (4) are connected with remote control circuit board (3) power supply, remote control circuit board (3) are equipped with first normal open branch road and second normal open branch road, the terminal box outside is equipped with lead-out wire interface (6), first normal open branch road and second normal open branch road electricity are connected in lead-out wire interface (6), lead-out wire interface (6) have connect the lead-out wire, the lead-out wire is equipped with 4 outgoing terminals, 4 outgoing terminals connect in 4 terminals of on-load tap changer upshift and downshift.

2. The remote switching device of the on-load tap-changer of the transformer according to claim 1, wherein a camera (13) and a receiver are provided, the camera (13) is used for shooting and acquiring video of the gear change of the on-load tap-changer, and the receiver is used for receiving the video of the gear change of the on-load tap-changer.

3. The remote switching device of the transformer on-load tap-changer according to claim 2, wherein the camera (13) is fixedly connected with a universal flexible shaft (14), and a strong magnet (15) is connected to the bottom of the universal flexible shaft (14).

4. The remote switching device of the on-load tap-changer of the transformer according to claim 1, wherein the junction box is an IP 68-level waterproof junction box and is provided with an upper shell (1) and a lower shell (2), a support column (7) is arranged at the bottom of the lower shell (2), and the remote control circuit board (3) is fixed on the support column (7) through a screw (8).

5. The remote switching device of the transformer on-load tap-changer according to claim 1, wherein the power supply module (4) is a rechargeable battery pack, a charging interface (5) is arranged on the outer side of the junction box, one end of the charging interface (5) is electrically connected with the rechargeable battery pack, and the other end of the charging interface (5) is connected with an external charger.

6. The remote switching device of the on-load tap-changer of the transformer according to claim 5, wherein an electric quantity display module (9) and a power switch (10) are arranged on the outer side of the junction box, and the electric quantity display module (9) and the power switch (10) are electrically connected with the rechargeable battery pack.

7. The remote switching device of an on-load tap changer of a transformer of claim 1, wherein the outgoing terminal is provided with a binding clip.

Images