CN205301503U

CN205301503U - One -tenth dish cable partial discharge detection device

Info

Publication number: CN205301503U
Application number: CN201520960542.3U
Authority: CN
Inventors: 陈国涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-28
Filing date: 2015-11-28
Publication date: 2016-06-08
Anticipated expiration: 2025-11-28

Abstract

The utility model discloses an one -tenth dish cable partial discharge detection device, including casing, signal display ware, signal generator, first lead wire mouth, second lead wire mouth, lead wire, first terminal and second terminal, a data port on the casing is equipped with first lead wire mouth and second lead wire mouth with the signal generator number of pass according to line connection, casing side, first lead wire mouth passes through pin connection with first stem, and second lead wire mouth passes through pin connection with the second terminal, still install the signal display ware with signal generator circuit connection on the casing. This one -tenth dish cable partial discharge detection device utilizes difference method electric capacity detection device detection streamer office when putting, need not change cable accessories's structure, utilizes the detection mode of coupling to avoid the electrical connection direct with high tension cable, and because the application of difference principle, can effectual noise suppression, it has great advantage in the aspect of the electrified detection to put into operation.

Description

A kind of one-tenth dish cable partial discharge detecting device

Technical field

This utility model relates to cable detecting device technical field, is specially a kind of one-tenth dish cable partial discharge detecting device.

Background technology

Distribution cable makes consumption very big in electrical network, for improving its operational reliability, installs a large amount of online condition checkout gears for electricity consumption enterprise. By measuring intensity and the motion frequency of the pulsed amperometric signal on cable grounding line, it is achieved the detection of distribution cable state of insulation and fault diagnosis.

China is for electricity consumption enterprise practice have shown that in recent years, there are two problems in above-mentioned detection method: 1. the problem of poor anti jamming capability in actual applications, such as: under many circumstances, electromagnetic interference can pass through the propagation such as the high-tension switch cabinet/ring main unit of grounded screen, ground connection busbar, terminal to cable grounding line; It addition, the earth lead of a plurality of cable feeder line is often first link together nearby in distribution, the pulse current of PD between different cables also can interfere with each other, it is difficult to determines the true cable that shelf depreciation occurs, affects diagnosis effect; 2. fixedly mount a large amount of online detecting devices, costly, less economical.

For this, this utility model provides a kind of one-tenth dish cable partial discharge detecting device, when utilizing calculus of finite differences capacitance detecting device detection cable partial discharge, need not change the structure of cable accessory, utilize the detection mode of coupling to avoid and be directly electrically connected with high tension cable.

Utility model content

This practical purpose is in that to overcome the shortcoming existed in prior art, a kind of one-tenth dish cable partial discharge detecting device is provided, when utilizing calculus of finite differences capacitance detecting device detection cable partial discharge, the structure of cable accessory need not be changed, utilize the detection mode of coupling to avoid and be directly electrically connected with high tension cable; With the problem solving to propose in above-mentioned background technology.

For achieving the above object, this utility model provides following technical scheme: a kind of one-tenth dish cable partial discharge detecting device, including casing, Signal Monitor, signal generator, the first lead wire outlet, the second lead wire outlet, lead-in wire, the first binding post and the second binding post;One FPDP of described casing upper end is connected by data wire with signal generator, and cabinet sides is provided with the first lead wire outlet and the second lead wire outlet; Described first lead wire outlet is connected by going between with the first stem, and the second lead wire outlet is connected by going between with the second binding post; Described casing is also equipped with the Signal Monitor being connected with signal generator circuit; Described casing is also equipped with integrating resistor adjusting knob; Described casing internal is provided with detecting device and iron-core coil.

Preferably, described detecting device includes detection impedance, metal forming, metallic shield cylinder and insulating washer; Described metal forming is attached on metallic shield cylinder, first binding post and the second binding post are arranged on the two ends of cable, an equivalent capacity is formed between metal forming and metallic shield cylinder, when the cable connector generation office of binding post one end puts, equivalent capacity coupling, the detection resistance detection between two metal formings is to Partial discharge signal.

Preferably, the iron core of described casing internal passes through coil spiral wound, and incoming line one end of coil is connected on signal generator, and line outlet one end is connected on integrating resistor R2.

Preferably, described casing, lead wire outlet, lead-in wire and binding post outer surface are insulant.

Compared with prior art, the beneficial effects of the utility model are: this one-tenth dish cable partial discharge detecting device, when utilizing calculus of finite differences capacitance detecting device detection cable partial discharge, the structure of cable accessory need not be changed, the detection mode utilizing coupling avoids and is directly electrically connected with high tension cable, and due to the application of differential principle, it is possible to effectively suppress noise; The live detection aspect that puts into operation has bigger advantage.

Accompanying drawing explanation

Fig. 1 is this utility model structural representation;

Fig. 2 is this utility model partial discharge detection structure drawing of device;

Fig. 3 is this utility model partial discharge detection schematic diagram of device;

Fig. 4 is this utility model partial discharge detection device circuit connection diagram.

In figure: 1 casing, 101 detection impedance, 102 metal formings, 103 metallic shield cylinders, 104 insulating washers, 11 integrating resistor adjusting knobs, 2 Signal Monitors, 3 signal generators, 31 data wires, 4 first lead wire outlet, 5 second lead wire outlet, 6 lead-in wires, 7 first binding posts, 8 second binding posts.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments. Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.

Embodiment

Refer to Fig. 1-4, this utility model provides a kind of technical scheme: a kind of one-tenth dish cable partial discharge detecting device, including casing 1, Signal Monitor 2, signal generator the 3, first lead wire outlet the 4, second lead wire outlet 5, lead-in wire the 6, first binding post 7 and the second binding post 8; One FPDP of described casing 1 upper end is connected by data wire 31 with signal generator 3, and casing 1 side is provided with the first lead wire outlet 4 and the second lead wire outlet 5; Described first lead wire outlet 4 is connected by lead-in wire 6 with the first stem 7, and the second lead wire outlet 5 is connected by lead-in wire 6 with the second binding post 8; Described casing 1 is also equipped with the Signal Monitor 2 being connected with signal generator 3 circuit; Described casing 1 is also equipped with integrating resistor adjusting knob 11;Described casing 1 is internal is provided with detecting device and iron-core coil.

Described detecting device includes detection impedance 101, metal forming 102, metallic shield cylinder 103 and insulating washer 104; Described metal forming 102 is attached on metallic shield cylinder 103, first binding post 7 and the second binding post 8 are arranged on the two ends of cable, an equivalent capacity is formed between metal forming 102 and metallic shield cylinder 103, when the cable connector generation office of binding post one end puts, equivalent capacity coupling, the detection resistance detection between two metal formings 102 is to Partial discharge signal; Iron core within described casing 1 passes through coil spiral wound, and incoming line one end of coil is connected on signal generator 3, and line outlet one end is connected on integrating resistor R2; Described casing 1, lead wire outlet, lead-in wire 6 and binding post outer surface are insulant.

Consult Fig. 2-3, during detection, respectively two pieces of metal formings 102 are attached on metallic shield cylinder 103, between metal forming 102 and metallic shield cylinder 103, form an equivalent capacity, C1, the C2 in figure; Another equivalent capacity is constituted with two sections of cable insulations, C3, C4 in figure, the capacitance of C3, C4 is essentially identical under normal circumstances, when the cable connector generation office of one of them binding post one end puts, equivalent capacity coupling, the detection resistance detection between two metal formings 102 is to Partial discharge signal.

Consult Fig. 4, adjust the resistance of the integrating resistor R2 that former secondary coil connects on magnetic core to mate, regulated by integrating resistor adjusting knob 11, find the parameter value of good amplitude-frequency characteristic on detecting device, signal generator 3 exports the sine wave signal under multiple frequency, regulating its output voltage makes resistance R1 voltage U1 constant, measures integrating resistor R2 voltage magnitude at respective frequencies, can observe cable detection information.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and when without departing substantially from spirit of the present utility model or basic feature, it is possible to realize this utility model in other specific forms. Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in this utility model. Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.

In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.

Claims

1. an one-tenth dish cable partial discharge detecting device, including casing (1), Signal Monitor (2), signal generator (3), the first lead wire outlet (4), the second lead wire outlet (5), lead-in wire (6), the first binding post (7) and the second binding post (8); It is characterized in that: a FPDP of described casing (1) upper end is connected by data wire (31) with signal generator (3), casing (1) side is provided with the first lead wire outlet (4) and the second lead wire outlet (5); Described first lead wire outlet (4) is connected by go between (6) with the first stem (7), and the second lead wire outlet (5) is connected by go between (6) with the second binding post (8);Described casing (1) is also equipped with the Signal Monitor (2) being connected with signal generator (3) circuit; Described casing (1) is also equipped with integrating resistor adjusting knob (11); Described casing (1) is internal is provided with detecting device and iron-core coil.

2. a kind of one-tenth dish cable partial discharge detecting device according to claim 1, it is characterised in that: described detecting device includes detection impedance (101), metal forming (102), metallic shield cylinder (103) and insulating washer (104); Described metal forming (102) is attached on metallic shield cylinder (103), first binding post (7) and the second binding post (8) are arranged on the two ends of cable, an equivalent capacity is formed between metal forming (102) and metallic shield cylinder (103), when the cable connector generation office of binding post one end puts, equivalent capacity coupling, the detection resistance detection between two metal formings (102) is to Partial discharge signal.

3. a kind of one-tenth dish cable partial discharge detecting device according to claim 1, it is characterized in that: the iron core of described casing (1) inside is by coil spiral wound, incoming line one end of coil is connected on signal generator (3), and line outlet one end is connected on integrating resistor R2.

4. a kind of one-tenth dish cable partial discharge detecting device according to claim 1, it is characterised in that: described casing (1), lead wire outlet, lead-in wire (6) and binding post outer surface are insulant.