CN203191510U

CN203191510U - Shielding room device for partial discharge test

Info

Publication number: CN203191510U
Application number: CN 201320205665
Authority: CN
Inventors: 江帆; 景安成
Original assignee: SHANGHAI LANPO HIGH VOLTAGE TECHNOLOGY EQUIPMENT Co Ltd
Current assignee: SHANGHAI LANPO HIGH VOLTAGE TECHNOLOGY EQUIPMENT Co Ltd
Priority date: 2013-04-22
Filing date: 2013-04-22
Publication date: 2013-09-11
Anticipated expiration: 2023-04-22

Abstract

The utility model provides a shielding room device for a partial discharge test. The shielding room device comprises a main body. A shielding door having attenuation effects is disposed on the main body; a shielding room base, arranged below the main body through an insulating layer, is embedded underground; the shielding room base is earthed through an earth electrode; and the main body is connected with an independent power supply through a safe loop. The shielding room device has the advantages that: defects of a conventional device are overcome; partial discharge, voltage resistance and partial discharge fault locating of a cable may be tested according to a GB/T12706-208 standard, signal interference from an extraneous electric field and a magnetic field may be effectively prevented, and the accuracy of test results is guaranteed; and therefore a market gap is made up.

Description

A kind of partial discharge test screened room device

Technical field

The utility model relates to a kind of partial discharge test screened room device, is used for preventing that electromagnetic wave from the space to the interference that system's measurement of partial discharge produces, belongs to the electromangnetic spectrum field.

Background technology

The safe handling of high-tension cable and life cycle have significance for safe operation and the work continuity of whole electrical network.Wherein, the quality whether bubble or slight crack, the quality of insulating material own are arranged in the cable solid insulating material production run, directly have influence on the serviceability of cable under the big electric current long-term work of high temperature situation, therefore need to judge through last test whether the quality of cable insulation material is qualified before cable dispatches from the factory, i.e. partial discharge test.

That partial discharge test has is highly sensitive, easily receive characteristics such as external interference, just need provide a confined space that is not subjected to external electrical field, magnetic interference for test thus.At present, this type of device yet there are no open on the market.

The utility model content

The technical problems to be solved in the utility model provides a kind of signal that can effectively avoid external electrical field, magnetic field for partial discharge test and disturbs the screened room device of warranty test result's accuracy.

In order to solve the problems of the technologies described above, the technical solution of the utility model provides a kind of partial discharge test screened room device, it is characterized in that: comprise main body, main body is provided with the shield door with attenuating, the screened room basis is located at main body below by insulation course and is embedded in undergroundly, and the screened room basis is by earthing pole ground connection; Main body connects independent power supply by safety return circuit.

Preferably, described screened room basis is formed by bar-mat reinforcement and concreting, and bar-mat reinforcement connects described earthing pole.

Preferably, described earthing pole resistance is less than 1 Ω.

Preferably, described shield door is by forming for the shielding wicket of personnel's turnover and the shielding gate of supply equipment turnover.

Preferably, described safety return circuit comprises the modulus switch box, and described independent power supply is connected with the modulus switch box through low tension switch case, isolating transformer and power-supply filter successively, and control power supply, illumination and receptacle loop all connect the modulus switch box; Electric connection box connects control wave filter and control desk, and phone connects the phone wave filter; Also be provided with galvanized iron conduit and air-conditioning waveguide on the described main body wall.

The principle of a kind of partial discharge test screened room device utilization shielding that the utility model provides, make a hexahedron room with metal material, because sheet metal weakens its electromagnetic energy to the absorption loss of incident electromagnetic wave greatly, and make screened room produce shielding action.

The device that the utility model provides has overcome the deficiencies in the prior art, can test cable local discharge, withstand voltage and partial discharges fault location by the GB/T12706-2008 standard-required, can effectively avoid the signal in external electrical field, magnetic field to disturb, warranty test result's accuracy has remedied the market vacancy.

Description of drawings

A kind of partial discharge test screened room device front view that Fig. 1 provides for the utility model;

A kind of partial discharge test screened room device right view that Fig. 2 provides for the utility model;

Fig. 3 is the screened room basic schematic;

Fig. 4 is the shield door synoptic diagram;

A kind of partial discharge test screened room device electric diagram that Fig. 5 provides for the utility model.

Embodiment

For the utility model is become apparent, now with a preferred embodiment, and conjunction with figs. is described in detail below.

Fig. 1 and Fig. 2 are respectively a kind of partial discharge test screened room device front view and the right view that the utility model provides, and described a kind of partial discharge test screened room device comprises by metal material makes a hexahedron main body 4, and shield door 5 is housed on the main body 4.In conjunction with Fig. 3, consider screened room deadweight and internal unit deadweight, need on main body 4 underground excavation screened room bases 1, casting concrete, used concrete is metal-containing material not, by earthing pole 2 ground connection, this zone must be removed or walk around in screened room addressing below as if already present building such as concrete, reinforcing bar, electrical equipment pipeline, water pipeline etc. are arranged as the bar-mat reinforcement of strengthening usefulness; Earthing pole 2 resistance should all should be lower than factory's stake resistance in any case less than 1 Ω.On screened room basis 1 insulation course 3 is set, for guaranteeing the single-point grounding of whole test system, except the independent grounding device of system oneself, not allowing has any being connected on electric with the factory floor terrace, this function is realized by insulated floor, insulated floor adopts 6 millimeters high-performance electrician class B insulation plates to isolate, and the insulation resistance in examination district can reach more than the 1000M Ω.

Main body 4 pilot regions adopt square steel material framework iron plate formula structure, and body of wall adopts steel plate not have seam welding, and interior wall adopts the nitro paint spraying, and exterior wall adopts heat-insulation and heat-preservation foam core color steel sheet to decorate.The pulpit body of wall adopts heat-insulation and heat-preservation foam core color steel sheet, the plastic-steel glass door and window, and the high-strength abrasion-proof composite floor board, handsome in appearance generous.

In conjunction with Fig. 4, shield door 5 is main thoroughfares of personnel and equipment turnover, and when guaranteeing shield effectiveness, whether its reliability, practicality and unlatching be convenient with most important.Shielding wicket and shielding gate twice shield door are set usually respectively for personnel and equipment turnover.

Shielding gate: adopt the electric translation gate, in order to guarantee effectiveness at closing time, doorframe is handled through special, the end of the edge of a knife is oppressed the metallic shield liner again, make total become the labyrinth form, electromagnetic wave just can enter screened room therebetween after making a circulation several times, improve attenuating effectively, sensitivity was steadily light and handy, easy to maintenance when this structure moved, and can use for a long time.

The shielding wicket: it is the compound edge of a knife of copper facing of matrix that the edge of a knife of door adopts with iron, electric conductivity preferably after the ferromagnetism that it is intrinsic and the copper facing, can take into account the shielding properties index of whole frequency band, adopt beryllium bronze spring lamination that elasticity and wearing quality are preferably arranged after vacuum heat, the edge of a knife and reed are through 30,000 plug tests, still can satisfy request for utilization, the edge of a knife and reed contact portion all are commaterial, potential difference (PD) is close, on surface of contact, can not produce electrocorrosion, can guarantee for a long time shielding properties to have improved reliability.

In conjunction with Fig. 5, for avoiding the interference from factory's consumer, the especially serious interference of controllable silicon consumer, the power supply of partial discharge test system must separate isolation with power supply strictnesses such as shop equipment, illuminations, separately power supply.It requires solely to power to the partial discharge test system from independent step-down transformer, power cable, the low tension switch packing list of 10kV transformer station (institute) in being installed on transformer station (institute) of factory.Main body 4 connects independent power supply 6 by safety return circuit 7.

Cable car is connected the low tension switch case through three-phase power socket 8 with electric block door electric box, panel box is disposed in each road electricity consumption respectively, independent power supply 6 is introduced main body 4 modulus switch box within the walls through low tension switch case, isolating transformer, power-supply filter, is reached and illumination and receptacle loop by panel box configuration to all kinds of control power supplys as required.Main body 4 also is equipped with electric connection box and phone within the walls, and the control wave filter all is connected electric connection box with control desk, and the phone wave filter connects phone.Galvanized iron conduit 9 and air-conditioning waveguide 10 are housed on main body 4 walls.

" shielding " is exactly to make hexahedron with metal plate (wire netting), electromagnetic wave is limited in the energy that makes its ripple in certain spatial dimension and passes to another side from one side and receive very big decay.A kind of partial discharge test screened room device that the utility model provides is exactly the principle of utilizing its shielding, make a hexahedron room with metal material, because sheet metal weakens its electromagnetic energy to the absorption loss of incident electromagnetic wave greatly, and make screened room produce shielding action.

A kind of partial discharge test screened room device that the utility model provides can be tested cable local discharge, withstand voltage and partial discharges fault location by the GB/T12706-2008 standard-required, it is the ideal equipment of each big cable factory, electric system and institution of higher learning's detection streamer insulating material performance, the utility model provides a kind of device that is exclusively used in the cable insulation material performance test, has remedied the market vacancy.

Claims

1. partial discharge test screened room device, it is characterized in that: comprise main body (4), main body (4) is provided with the shield door (5) with attenuating, screened room basis (1) is located at main body (4) below by insulation course (3) and is embedded in undergroundly, and screened room basis (1) is by earthing pole (2) ground connection; Main body (4) connects independent power supply (6) by safety return circuit (7).

2. a kind of partial discharge test screened room device as claimed in claim 1, it is characterized in that: described screened room basis (1) is formed by bar-mat reinforcement and concreting, and bar-mat reinforcement connects described earthing pole (2).

3. a kind of partial discharge test screened room device as claimed in claim 1 or 2, it is characterized in that: described earthing pole (2) resistance is less than 1 Ω.

4. a kind of partial discharge test screened room device as claimed in claim 1 is characterized in that: described shield door (5) is by forming for the shielding wicket of personnel's turnover and the shielding gate of supply equipment turnover.

5. a kind of partial discharge test screened room device as claimed in claim 1, it is characterized in that: described safety return circuit (7) comprises the modulus switch box, described independent power supply (6) is connected with the modulus switch box through low tension switch case, isolating transformer and power-supply filter successively, and control power supply, illumination and receptacle loop all connect the modulus switch box; Electric connection box connects control wave filter and control desk, and phone connects the phone wave filter; Also be provided with galvanized iron conduit (9) and air-conditioning waveguide (10) on described main body (4) wall.