CN204046012U - A kind of specific purpose tool for CT in auxiliary replacement 10kV switch cubicle - Google Patents

Abstract

The utility model discloses a special tool for auxiliary replacement of CT in a 10kV switch cabinet, which includes a chassis car, an insulating support body, a door opening guide body and at least one closing body, the bottom of the insulating support body is fixed on the chassis car, The two door-opening guides are respectively fixed on both sides of the lower part of the insulating support, and the closing body is fixed on the front upper part of the insulating supporting body; during the process of advancing to the valve through the chassis, the door-opening guide touches the valve to trigger the valve to open and the closing body Close the static contact box on the busbar side, and then operate the static contact on the line side to replace the CT. After using this special tool, you only need to cut off the power at the feeder interval where the current CT to be replaced can be safely replaced, which reduces the scope of power outages and reduces maintenance costs; secondly, after using this special tool, only one person is required to replace it. It avoids the situation that the valve suddenly drops due to the careless operation of two people, causing personal and equipment damage, and improves work safety and work efficiency.

Description

A special tool for auxiliary replacement of CT in 10kV switchgear

technical field

The utility model relates to the field of maintenance of high-voltage switch cabinets, in particular to a special tool for assisting the replacement of CTs in 10kV switch cabinets.

Background technique

With the increasing number of industries and residences and the increasing demand for electricity from users, CT (current transformers) with transformation ratios of 200/5, 300/5, and even 400/5 in the early high-voltage switchgear can no longer meet user needs. , it is necessary to increase the CT change and replace the CT with a transformation ratio of 600/5. At present, to replace the CT, the entire 10kV busbar needs to be shut down, and the overhaul takes 8 hours. The long and wide-ranging power outage not only causes load loss to the company, but also brings troubles to users.

Utility model content

The utility model provides a special tool for auxiliary replacement of CT in a 10kV switch cabinet, which overcomes the shortcomings of the prior art described in the background art.

The technical solution adopted by the utility model to solve its technical problems is:

A special tool for auxiliary replacement of CT in a 10kV switch cabinet. The lead wire row on one side of the CT is installed in the static contact box on the line side in the switch cabinet. The door-opening guide body and at least one closing body used to close the static contact box on the busbar side of the switch cabinet, the bottom of the insulating support body is fixed on the chassis vehicle, and the two door-opening guide bodies are respectively fixed on both sides of the lower part of the insulating support body, and the closing body It is fixed on the upper front of the insulating support body; during the process of advancing to the valve through the chassis, the door-opening guide body touches the valve to trigger the valve to open, and the closing body closes the static contact box on the bus side, and then operates the static contact on the line side to replace the CT .

In one embodiment: the door-opening guide is a concave-shaped guide adapted to the linear guide groove on the inner wall of the switch cabinet, which has a mounting surface and two guiding sides, and the door-opening guide is locked to the insulating support body through the mounting surface. The front ends of the two guiding sides respectively extend forward and partly bend opposite to each other to form an unlocking key for pushing against and opening the shutter.

In one embodiment: the closing body is an end cover member that covers the static contact box on the side of the busbar and closes its opening.

In an embodiment: the groove is a hollow part cylinder with only a bottom surface and a side surface.

In an embodiment: the closing body includes three, which are respectively used to close the static contact boxes on the bus side of different phase sequences in the three-phase line.

In an embodiment: the insulating support body is a wedge-shaped body inclined from back to front.

Compared with the background technology, this technical solution has the following advantages:

A special tool for auxiliary replacement of CT in a 10kV switch cabinet. The lead wire row on one side of the CT is installed in the static contact box on the line side in the switch cabinet. The special tool includes a chassis car, an insulating support body, and two The door opening guide body of the cabinet valve and at least one closing body used to close the static contact box on the busbar side of the switch cabinet, during the process of advancing to the valve through the chassis vehicle, the door opening guide touches the valve door to trigger the valve to open, and the closing body closes the busbar The side static contact box, and then operate the line side static contact to replace the CT; after using this special tool, only need to cut off the power at the feeder interval where the current CT is to be replaced can be safely replaced, which reduces the scope of power failure and reduces the maintenance cost. , After using this special tool, only one person is required to operate and replace it, which avoids the situation that the valve suddenly falls due to the careless operation of two people and causes personal and equipment damage, and improves work safety and work efficiency.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 depicts a side view of the utility model.

Fig. 2 depicts the front view of the utility model.

Fig. 3 depicts the application diagram of the utility model in the switch cabinet.

Detailed ways

Please refer to Figure 1 and Figure 2, a special tool for auxiliary replacement of CT in a 10kV switch cabinet. The CT is installed in the static contact box 10 on the line side in the switch cabinet. The special tool includes a chassis car 1, an insulating support body 2. Two door opening guides 3 for opening the valve 30 of the switch cabinet and at least one closing body 4 for closing the static contact box 20 on the busbar side of the switch cabinet.

The bottom of the insulating support body 2 is fixed on the chassis vehicle 1, the two door-opening guide bodies 3 are respectively fixed on both sides of the lower part of the insulating support body 2, and the closing body 4 is fixed on the front upper part of the insulating support body 2; in this embodiment, the The insulating support body 2 is a wedge-shaped body inclined from back to front.

The door-opening guide body 3 is a concave-shaped guide body adapted to the linear guide groove on the inner wall of the switch cabinet, and has a mounting surface 31 and two guiding sides 32. On the left and right sides of the lower part of the body 2, the front ends of the two guide sides 32 of the door-opening guide body 3 respectively extend forward and partly bend away from each other to form an unlock key 33 for touching and opening the valve.

The closing body 4 is an end cover member that covers the static contact box on the busbar side and closes its opening. In this embodiment, the end cover member is a hollow cylinder with only a mounting bottom surface and a peripheral side edge. Other structural closures capable of sealing and isolating the static contact box on the busbar side also belong to the protection scope of the present invention, and are not limited to end cover components. In this embodiment, the closing body 4 includes three, which are respectively used to close the static contact boxes 20 on the bus side of different phase sequences in the three-phase line.

When the utility model is in use, please refer to Figure 3, place the special tool on the 10kV transfer trolley, push it to the test position of the middle cabinet of the 10kV switch cabinet, use the operating handle to push the special tool from the test position into the working position, that is, to The valve 30 of the switch cabinet is pushed forward, and the door-opening guide body 3 cooperates with the guide groove on the inner wall of the switch cabinet to push forward. During the process of advancing, the special tool uses the unlocking key 33 on the door-opening guide body 3 to push against the locking piece on the valve, and the valve Open to expose the busbar static contact box 20 and the line side static contact box 10; when the special tool is pushed to the working position, its closing body 4 will replace the valve to close the busbar side static contact box 20 again, isolating the charged busbar side , At this time, the static contact box on the line side is not closed, and the static contact on the line side can be operated to remove the copper bar fixing the CT and replace the CT.

After using this special tool, you only need to cut off the power supply at the feeder interval where the current CT to be replaced can be safely replaced, which reduces the scope of power outages. Taking the 110kV Renmin Substation 10kV Human Ring II Line 688 switch interval of the State Grid Longyan Power Supply Company as an example, use this After the special tool is used, the power failure operation time can be reduced by 2 hours, and the power failure range is reduced from the original entire busbar (8 feeder intervals on average) to 1 feeder interval, the operation efficiency is improved, and the maintenance cost is reduced; secondly, the use of this After the special tool is installed, only one person needs to operate and replace it, which avoids the situation that the valve suddenly falls due to the careless operation of two people and causes personal and equipment damage, and improves work safety and work efficiency.

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited accordingly, that is, the equivalent changes and modifications made according to the patent scope of the utility model and the contents of the specification should still belong to this utility model. within the scope of utility models.

Claims (5)

1. the specific purpose tool for CT in auxiliary replacement 10kV switch cubicle, CT side lead is arranged in the line side fixed contact box in switch cubicle, it is characterized in that: comprise chassis vehicle, insulation support body, two and open a guide way and at least one obturator for closed switch cabinet bus bar side fixed contact box for opening switch cabinet valve, the bottom of insulation support body is fixing on a chassis, two open a guide way is separately fixed at both sides, insulation support body bottom, and obturator is installed in the front upper of insulation support body; In the process advanced to valve by chassis vehicle, open a guide way and contact valve and trigger valve and open obturator enclosed busbar side fixed contact box simultaneously, and then operating line trackside fixed contact changes CT.

2. a kind of specific purpose tool for CT in auxiliary replacement 10kV switch cubicle according to claim 1, it is characterized in that: described in open the concave shape guide way that a guide way is adaptive switch cubicle inwall line channel, it has installed surface and two guiding sides, open a guide way and be locked in insulation support body by installed surface, the front end of two guiding sides is respectively to front extension and opposingly formed for contacting and opening the spoon of unblanking of valve to ground part bending.

3. a kind of specific purpose tool for CT in auxiliary replacement 10kV switch cubicle according to claim 1, is characterized in that: described obturator is that lid connects bus bar side fixed contact box and closes the cover member of its opening.

4. a kind of specific purpose tool for CT in auxiliary replacement 10kV switch cubicle according to claim 1 or 3, is characterized in that: described obturator comprises three, is respectively used to the bus bar side fixed contact box of different phase sequence in closed three-phase line.

5. a kind of specific purpose tool for CT in auxiliary replacement 10kV switch cubicle according to claim 1, is characterized in that: described insulation support body be one by after the sphenoid that turns forward.