CN212364543U

CN212364543U - Low-voltage line load leakage detection device

Info

Publication number: CN212364543U
Application number: CN202021942647.3U
Authority: CN
Inventors: 陈华军; 曾端阳
Original assignee: Qidong County Branch Of Hengyang Xiangneng Rural Power Service Co ltd
Current assignee: Qidong County Branch Of Hengyang Xiangneng Rural Power Service Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-01-15
Anticipated expiration: 2030-09-08

Abstract

The utility model discloses a low-voltage line load electric leakage detection device, including pincerlike ampere meter and electric leakage detection circuit, electric leakage detection circuit includes that first connecing the electricity to press from both sides, the second connects the electricity to press from both sides, current-limiting element, rectifier module and third to connect the electricity to press from both sides, and first connecing electricity to press from both sides and the second connects the electricity to press from both sides and pass through the wire connection, and current-limiting element and rectifier module establish ties on first connecing the electricity to press from both sides and the third connects the wire that the electricity pressed from both sides and connect, and rectifier module sets up to make the electric current connect the electricity from first connecing the electricity to. The utility model can diagnose the leakage position quickly and accurately, and greatly improve the quick response of the transmission line leakage maintenance; the utility model has the advantages of convenient carrying, simple operation, low cost of each component of the device, repeated use, and reduced use cost; the utility model discloses need not dismantle the transformer, reduced the intensity of labour of investigation process, can find out the electric leakage position under the circumstances of not having a power failure, the investigation process can not influence resident and enterprise's power consumption.

Description

Low-voltage line load leakage detection device

Technical Field

The utility model relates to an electric power transmission field especially relates to an easy operation, but quick check low-voltage line load leakage detection device.

Background

In the existing power transmission line, in the process of transmitting power to users by the transmission line of the transformer (below 0.4 KV), the phenomenon of electric leakage sometimes occurs, and further, the troubleshooting and maintenance are required by power technicians.

At present, a common leakage detection method is shown in fig. 1, before leakage detection, an outlet terminal A, B, C of a main switch of a distribution box and N four wires must be completely detached, then the four wires are connected together, and then one phase wire is jumped from any one of the front ends of the switches to the three originally detached phase wires, so that a leakage circuit and a grounding flat iron of a transformer form a loop through the ground. And then detecting the overlapped A, B and C three-phase line by using an alternating current gear of the clamp ammeter, then gradually checking each phase until a leakage point is found, and recovering power transmission after searching and repairing.

The technical personnel need to disassemble each phase line of the output end of the main switch of the distribution box, and meanwhile, the A, B and C three-phase lines need to be checked step by step, so that the workload is very large and the safety is not high; particularly, in the process of inspection, power failure processing needs to be performed on residents or factories and enterprises in the electric leakage area, which brings great inconvenience to life of the residents and production and power utilization of the enterprises.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an easy operation, but low tension line area load of reuse of short-term test transmission line electric leakage position is checked electric leakage device fast.

In order to realize the above-mentioned purpose, the utility model discloses a low-voltage line load leakage detection device, including pincerlike ampere meter and leakage detection circuit, the leakage detection circuit includes that first connecing electric clamp, second to connect electric clamp, current limiting element, rectifier module and third to connect the electric clamp, first connecing electric clamp and second to connect the electric clamp to pass through the wire and connect, current limiting element and rectifier module establish ties first connecing electric clamp and third to connect on the wire that the electric clamp is connected, rectifier module sets up to make the electric current follow first connecing electric clamp connects the electric clamp unidirectional conduction to the third.

Furthermore, the first power connection clamp, the second power connection clamp and the third power connection clamp are all crocodile clamps.

Further, the conducting wire is 800-1200mm long and has a cross section of 4-6mm²The annealed copper wire of (1).

Further, the current limiting element is a bulb, and the power of the bulb is 150 and 200W.

Further, the rectifier module is a rectifier diode, and the type of the rectifier diode is 1N 5408.

Furthermore, the clamp ammeter is a manual range alternating current-direct current clamp ammeter.

Compared with the prior art, the utility model has the advantages of:

1. the utility model can diagnose the leakage position quickly and accurately, and greatly improve the quick response of the transmission line leakage maintenance;

2. the utility model has the advantages of convenient carrying, simple operation, low cost of each component of the device, repeated use and reduced use cost;

3. the utility model discloses need not dismantle the transformer, reduced the intensity of labour of investigation process, can find out the electric leakage position under the circumstances of not having a power failure, the investigation process can not influence resident and enterprise's power consumption, and the facilitate promotion is used.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic diagram of leakage detection under load for a low-voltage line disclosed in the prior art;

fig. 2 is a schematic structural diagram of a pincerlike leakage testing device of the leakage testing device and method for low-voltage line with load according to the preferred embodiment of the present invention;

fig. 3 is a schematic structural diagram of an electric leakage inspection device with load for low-voltage line according to the preferred embodiment of the present invention;

fig. 4 is a schematic flow chart of the leakage detection method with load for low-voltage line according to the preferred embodiment of the present invention.

Illustration of the drawings:

1. a first power connection clip; 2. a second power connection clip; 3. a third power connection clip; 4. a bulb; 5. a rectifier diode; 6. a transformer; 7. a clamp-on ammeter; 8. grounding flat iron; 9. leakage current; 10. and (4) screws.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

The utility model discloses a low-voltage line load leakage detection device, as shown in figure 2, including pincerlike ampere meter 7 and electric leakage detection circuit, electric leakage detection circuit includes first electricity clamp 1 that connects, the second connects electricity clamp 2, current-limiting element, rectifier module and third connect electricity clamp 3, first electricity clamp 1 that connects with the second and connects electricity clamp 2 to pass through the wire and connect, establish ties on the wire that first electricity clamp 1 and third connect electricity clamp 3 to be provided with current-limiting element and rectifier module, rectifier module sets up to make the electric current connect 3 one-way conduction from first electricity clamp 1 to third electricity clamp, wherein, the wire is 1000mm long sectional area, the wire is 6mm long sectional area²The annealed copper wire of (1). Through the device, can need not realize one-man operation, investigation under the condition of tearing transformer or block terminal open, reduced the intensity of labour of investigation process, more importantly, can arrange the electric leakage position under the circumstances of not having a power failure, the investigation process can not influence resident and enterprise's power consumption, convenient to popularize and apply.

In this embodiment, first connecing electric clamp 1, second to connect electric clamp 2 and third to connect electric clamp 3 and be the crocodile clip that can bear the heavy current, in case press from both sides tightly the connection back, can release both hands, carry out the electric leakage investigation.

In the embodiment, the current limiting element is the bulb 4, the bulb 4 is 200W, and the use cost is remarkably low compared with other large-resistance current limiting components; and rectifier diode 5 is directly selected for use to the rectifier module, and rectifier diode 5's model is 1N5408, and is same, and relative other types of rectifier circuit module, use cost is showing and is reducing, convenient to popularize and apply.

In this embodiment, the clamp ammeter 7 is a manual range ac/dc clamp ammeter, and specifically, a manual range ac/dc clamp ammeter of the type described in the Binjiang brand BM823 can be used, and an automatic range clamp ammeter is not used, because it is possible to prevent the automatic range clamp ammeter from being automatically switched to an ac current level during measurement, and further, measurement cannot be performed or measurement fails.

Then, the utility model discloses a low-voltage line load leakage detection method, this method should avoid the thunder and lightning time quantum when the operation, as shown in fig. 3 and 4, low-voltage line load leakage detection device including above-mentioned scheme, include following step:

s1, clamping the grounding wire of the transformer 6 by using the first power clamp 1, wherein the specific position is the upper end from the N phase line to the screw 10 of the grounding flat iron 8;

s2, clamping the grounding flat iron 8 of the transformer 6 by the second grounding clamp 2, so that the grounding circuit of the transformer 6 is positioned between the second grounding clamp 2 and the first grounding clamp 1 to be short-circuited, and the transformer 6 is ensured to be kept in a grounding safe state when the screw 10 at the grounding flat iron 8 is removed;

s3, removing the screw 10 at the position of the grounding flat iron 8, so as to separate the grounding flat iron 8 from the grounding wire of the transformer 6, and grounding the transformer 6 through the first grounding clamp 1, the second grounding clamp 2 and the conducting wires between the first grounding clamp and the second grounding clamp;

s4, clamping the grounding flat iron 8 of the transformer 6 by the third electricity-connecting clamp 3, and loosening the second electricity-connecting clamp 2, so that the transformer 6 forms a direct current conductive loop with a leakage point after being grounded through the bulb 4 and the rectifier diode 5;

s5, the direct current gear of the clamp ammeter 7 is used for detecting the A, B and C three-phase line at the output end of the transformer 6, if the clamp ammeter 7 has current display, the phase line has electric leakage (the leakage detection circuit and the leakage position are formed with leakage current 9 through the ground), so that the phase line with the electric leakage can be judged quickly, and then the phase line is checked backwards until the leakage point, so that the leakage position can be found simply and quickly, and the screw 10 for installing the grounding flat iron 8 is recovered after the checking is finished.

In this embodiment, in step S3, after removing the screws 10 on the grounding flat iron 8, the insulating gloves are worn to prevent the leakage of electricity from the transformer 6 and the electric shock of the technician.

In the present embodiment, in step S4, after the second power receiving clip 2 is released, the second power receiving clip 2 is connected to the first power receiving clip 1, so that the wire between the second power receiving clip 2 and the first power receiving clip 1 is short-circuited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a low-voltage line load leakage detection device, characterized in that, includes pincerlike ampere meter (7) and electric leakage detection circuit, electric leakage detection circuit includes first electricity clamp (1), second electricity clamp (2), current limiting element, rectifier module and third electricity clamp (3) that connects, first electricity clamp (1) and second electricity clamp (2) are connected through the wire, current limiting element and rectifier module establish ties on the wire that first electricity clamp (1) and third electricity clamp (3) are connected, rectifier module sets up to make the electric current follow first electricity clamp (1) connects third electricity clamp (3) unidirectional conduction.

2. The low-voltage line loaded leakage detection device according to claim 1, wherein the first (1), second (2) and third (3) electrical connection clamps are all crocodile clamps.

3. The low-voltage line on-load leakage inspection device as claimed in claim 1, wherein the conductive line is 800-1200mm long and has a cross-sectional area of 4-6mm²The annealed copper wire of (1).

4. The low-voltage line on-load leakage inspection device as claimed in claim 1, wherein the current limiting element is a lamp (4), and the power of the lamp (4) is 150-200W.

5. The low-voltage line loaded leakage detection device according to claim 1, wherein the rectifying module is a rectifying diode (5), and the type of the rectifying diode (5) is 1N 5408.

6. The low-voltage line loaded leakage detection device according to claim 1, wherein the clamp ammeter (7) is a manual range ac/dc clamp ammeter.