CN208580172U - One kind being grounded situation device for fast detecting for power system device - Google Patents
One kind being grounded situation device for fast detecting for power system device Download PDFInfo
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- CN208580172U CN208580172U CN201821105898.9U CN201821105898U CN208580172U CN 208580172 U CN208580172 U CN 208580172U CN 201821105898 U CN201821105898 U CN 201821105898U CN 208580172 U CN208580172 U CN 208580172U
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Abstract
The utility model discloses one kind to be grounded situation device for fast detecting for power system device, test circuit unit including shell and in shell, the test circuit unit includes internal battery module, constant-current source output module, voltage measurement module and central control unit, the internal battery module is connected with the input terminal of constant-current source output module, current measurement module is had on the constant-current source output module, the central control unit includes controller interconnected, display screen and low-tension supply, the low-tension supply is connected with internal battery module, the current measurement module, voltage measurement module is connected with controller respectively.The utility model can easily detect ground resistance size, and operator is facilitated to judge ground connection situation quality according to current standard, have the advantages that structure simply, it is safe and convenient, easy to carry.
Description
Technical field
The utility model relates to equipment ground condition detecting devices, and in particular to one kind is grounded shape for power system device
Condition device for fast detecting.
Background technique
Field of power system at present works on electrical equipment, guarantee safe technical measures be power failure, electrical verification, ground connection,
Suspension nameplate and installing are blocked, and this four main measures should be carried out successively.Unexpected power transmission is to electrical equipment and secondary in order to prevent
The anti-power transmission of system, and eliminate otherwise induced electricity needs temporarily connect by the installing of repair apparatus metal part is necessary
Ground wire closes power failure equipments grounding switch.Temporary ground wire should first connect ground terminal, be followed by conductor end, when tearing open sequence on the contrary, this
After sample loads onto ground line, prevent from equipment send a telegram here suddenly and high voltage induction electricity cause personal injury.
Traditional operation Fang Fafa is in the incoming call side of repair apparatus installing ground line or to close grounding switch, is set to prevent
The standby injury of incoming call or high voltage induction electricity to overhaul of the equipments personnel suddenly, is substantially by equipment ground, even if equipment current potential
For ground potential, even if incoming call, the anti-power transmission of equipment or having higher induced electricity also can will by ground line or grounding switch suddenly
Electric (lotus) is introduced into grounded screen, the earth is flowed into, to avoid human electric shock.It is elapsed however as the time, power equipment is constantly old
Change, the oxidation aggravation of metal position, the corrosion of suspension ground line or grounding knife lock cause ground connection not firm, and contact resistance becomes larger
Even there is " virtual earth ", but at present there has been no a kind of easy to use, quickly and easily tool detects ground line, grounding switch
Equal equipment grounds situation quality, once repair apparatus is sent a telegram here suddenly or equipment high voltage induction is electric and the anti-power transmission of equipment will will lead to
Service personnel's electric shock, this causes great threat to the safety even life of service personnel.
Utility model content
The technical problems to be solved in the utility model: in view of the above problems in the prior art, provide that a kind of structure is simple, peace
The full power system device that is used for convenient, easy to carry is grounded situation device for fast detecting.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
The present invention provide it is a kind of be grounded situation device for fast detecting for power system device, including shell and be set to shell
In test circuit unit, the test circuit unit includes internal battery module, constant-current source output module, voltage measurement module
And central control unit, the internal battery module are connected with the input terminal of constant-current source output module, the constant-current source exports mould
Current measurement module is had on block, the central control unit includes controller, display screen and low-tension supply interconnected,
The low-tension supply is connected with internal battery module, and the current measurement module, voltage measurement module are connected with controller respectively.
Preferably, the output end of the constant-current source output module includes positive current delivery outlet and negative current delivery outlet, voltage
The output end of measurement module includes positive voltage detection hole and negtive voltage detection hole, the positive current delivery outlet, negative current delivery outlet,
Positive voltage detection hole, negtive voltage detection hole are arranged on shell.
Preferably, both the positive current delivery outlet, positive voltage detection hole are connected with shared positive Insulation test line, and institute
The end for stating positive Insulation test line has positive wire clamp；Both negative current delivery outlet, negtive voltage detection hole are connected with shared bear
Insulation test line, and the end of the negative Insulation test line has cathode wire clamp.
Preferably, the positive Insulation test line and negative Insulation test line include two cables, the anode wire clamp and negative
Polar curve folder includes two metal clips, and the end of the metal clip is equipped with insulation sleeve, and two of the positive Insulation test line
A cable one end connect one of conducting, the other end and positive wire clamp by positive current plug with positive current delivery outlet in cable
The connection conducting of metal clip, another cable one end by positive voltage plug connect with positive voltage detection hole conducting, the other end and
Another metal clip of positive wire clamp connects conducting, and a cable one end passes through in two cables of the negative Insulation test line
Negative current plug connect the metal clip connection conducting of conducting, the other end and cathode wire clamp with negative current delivery outlet, another
Root cable one end connect another metal clip of conducting, the other end and cathode wire clamp by negative voltage plug with negtive voltage detection hole
Mouth connection conducting.
Preferably, the middle section of the positive Insulation test line is the coil spring shape of retractable.
Preferably, the middle section of the negative Insulation test line is the coil spring shape of retractable.
Compared to the prior art, the utility model has an advantage that when high-tension apparatus operation maintenance personnel is to power failure equipments
It, can be right by the utility model after having installed ground line or having closed grounding switch when guarantee the technical measures of safety
Test item ground connection contact site carries out electric current output/detection and voltage detecting so as to can easily detect ground line (ground connection
Disconnecting link) ground resistance size, facilitate operator to judge ground connection situation quality according to current standard, has structure simple, safe
Advantage convenient, easy to carry.
Detailed description of the invention
Fig. 1 is the external structure schematic diagram of the utility model embodiment.
Fig. 2 is the internal logic structure schematic diagram of the utility model embodiment.
Fig. 3 is the structural schematic diagram of positive Insulation test line in the utility model embodiment.
Fig. 4 is the structural schematic diagram of negative Insulation test line in the utility model embodiment.
Marginal data: 1, shell；2, internal battery module；3, constant-current source output module；31, positive current delivery outlet；32, it bears
Electric current delivery outlet；4, voltage measurement module；41, positive voltage detection hole；42, negtive voltage detection hole；5, central control unit；6, just
Insulation test line；61, positive wire clamp；62, positive current plug；63, positive voltage plug；7, negative Insulation test line；71, negative line
Folder；72, negative current plug；73, negative voltage plug.
Specific embodiment
As depicted in figs. 1 and 2, the present embodiment includes shell 1 for power system device ground connection situation device for fast detecting
With the test circuit unit being set in shell, test circuit unit includes internal battery module 2, constant-current source output module 3, voltage
Measurement module 4 and central control unit 5, internal battery module 2 are connected with the input terminal of constant-current source output module 3, and constant-current source is defeated
Current measurement module is had in module 3 out, central control unit 5 includes controller interconnected, display screen and low tension
Source, low-tension supply are connected with internal battery module 2, and current measurement module, voltage measurement module 4 are connected with controller respectively.When
High-tension apparatus operation maintenance personnel is grounded or closes ground connection when guarantee the technical measures of safety to power failure equipments, when having installed
After disconnecting link, by the utility model test item can be grounded contact site carry out electric current output/detection and voltage detecting to
Ground line (grounding switch) ground resistance size can be easily detected, operator is facilitated to judge to be grounded according to current standard
Situation quality, have the advantages that structure simply, it is safe and convenient, easy to carry.If any imperfect earth, operation maintenance personnel can dock again
Ground wire or grounding switch are adjusted, then are detected by utility model device, until being grounded in order, it is ensured that power failure equipments
Anti- power transmission and induced electricity will not injure service personnel's safety, have a safety feature, and use is portable, economical simple.
In the present embodiment, shell 1 is ambroin material, and drop resistant is anticorrosive.
In the present embodiment, internal battery module 2 uses rechargeable lithium battery, and it is defeated to be connected to constant-current source by cell voltage DC24V
Module out, and the constant current for exporting 10A is grounded contact site to test item.In addition, being additionally provided on shell 1 in the present embodiment
For master switch and testing button (being tested for starting controller), after test method is opens instrument by master switch,
Testing button measurement is pinned, to numerical stability, unclamping measurement terminates, and time of measuring is 1~3s, range is 0~1000m Ω.
As shown in Figure 1, the output end of constant-current source output module 3 includes positive current delivery outlet 31 and negative current delivery outlet 32,
The output end of voltage measurement module 4 includes positive voltage detection hole 41 and negtive voltage detection hole 42, positive current delivery outlet 31, negative current
Delivery outlet 32, positive voltage detection hole 41, negtive voltage detection hole 42 are arranged on shell 1, and it is four terminals that the present embodiment, which uses,
Method measures contact resistance, and the contact resistance bring error that can eliminate positive and negative Insulation test line resistance and wire clamp influences.
As shown in Figure 3 and Figure 4, both positive current delivery outlet 31, positive voltage detection hole 41 are connected with shared positive insulation and survey
Line 6 is tried, and the end of positive Insulation test line 6 has positive wire clamp 61；Both negative current delivery outlet 32, negtive voltage detection hole 42 are even
It is connected to shared negative Insulation test line 7, and the end of negative Insulation test line 7 has cathode wire clamp 71.
As shown in Figure 3 and Figure 4, positive Insulation test line 6 and negative Insulation test line 7 include two cables, positive wire clamp 61
It include two metal clips with cathode wire clamp 71, the supporting element of metal clip handle and its metal clip end is ambroin
The end of material, metal clip is equipped with insulation sleeve, and a cable one end passes through positive current in two cables of positive Insulation test line 6
Plug 62 connect conducting, the other end with positive current delivery outlet 31 and connect conducting with a metal clip of positive wire clamp 61, another
Root cable one end connect another of conducting, the other end and positive wire clamp 61 by positive voltage plug 63 with positive voltage detection hole 41
The connection of metal clip is connected, and a cable one end passes through negative current plug 72 and negative electricity in two cables of negative Insulation test line 7
A metal clip for flowing the connection of delivery outlet 32 conducting, the other end and cathode wire clamp 71, which connects, to be connected, and another cable one end is logical
Cross another metal clip connection that negative voltage plug 73 connect conducting, the other end and cathode wire clamp 71 with negtive voltage detection hole 42
Conducting.In the present embodiment, the middle section of positive Insulation test line 6 is the coil spring shape of retractable, so that positive Insulation test line 6
Not only saved storage space but can free extension realize length adjustment, be convenient for voltage levels and eminence electric device maintenance.
In the present embodiment, the middle section of negative Insulation test line 7 is the coil spring shape of retractable, so that negative Insulation test
Line 7 not only saved storage space but also can free extension realize length adjustment, be convenient for voltage levels and eminence electric device maintenance.
It can also will be sentenced as a further improvement of the utility model, according to ground line (grounding switch) ground resistance size
It is disconnected to judge that the current standard of ground connection situation quality is cured in controller, thus by controller further automatically according to existing
Rower standard judges ground connection situation quality, and result is output on display screen and is shown.But the present embodiment is used for power train
The realization of system equipment ground situation device for fast detecting is not rely on above-mentioned improvement project.
After equipment operation maintenance personnel has installed ground line or has closed grounding switch to interruption maintenance equipment, it is to be ensured that ground connection
In order, can just prevent the anti-power transmission in incoming call side or equipment induced electricity personal injury is caused to service personnel.By the present embodiment
Situation device for fast detecting fieldtesting results such as the following table 1 institute in the electricity grid substation of this area is grounded for power system device
Show:
Table 1: the present embodiment test result table.
| Serial number | Substation | Equipment | Earthing mode | Ground resistance (m Ω) | Situation is shown | Test |
| 1 | Connection is flat | 5201 disconnecting switch | Three-phase shortcircuit ground line | 224.6 | It is in poor shape | No. 1 |
| 2 | Profound Jia Tang | 5041 disconnecting switch | Grounding switch | 78.2 | Situation is fine | No. 2 |
| 3 | Profound Jia Tang | 602 breakers | Grounding switch | 75.5 | Situation is fine | No. 2 |
| 4 | Profound Jia Tang | 606 voltage transformers | Three-phase shortcircuit ground line | 45.6 | In order | No. 2 |
| 5 | The lake Ling | 304 breakers | Three-phase shortcircuit ground line | 1207.4 | It is not connected | No. 3 |
| 6 | The lake Ling | 5061 disconnecting switch | Grounding switch | 621.3 | It is in poor shape | No. 3 |
| 7 | The Gallus domesticlus brisson pool | 504 current transformers | Three-phase shortcircuit ground line | 98.5 | Situation is fine | No. 4 |
| 8 | Pinghu | No. 2 capacitors | Three-phase shortcircuit ground line | 48 | In order | No. 3 |
| 9 | Distant field | No. 1 reactor | Three-phase shortcircuit ground line | 146.6 | Situation is fine | No. 1 |
| 10 | Lion Rock | 5021 disconnecting switch | Grounding switch | 1312.5 | It is not connected | No. 1 |
| 11 | It converges | Mother's I voltage transformer | Three-phase shortcircuit ground line | 94.3 | Situation is fine | No. 5 |
| 12 | It converges | No. 1 main transformer | Three-phase shortcircuit ground line | 203.6 | It is in poor shape | No. 5 |
| 13 | Radiance | No. 2 main transformers | Three-phase shortcircuit ground line | 52.3 | Situation is fine | No. 4 |
| 14 | The triangle pool | 506 arresters | Three-phase shortcircuit ground line | 47.9 | In order | No. 5 |
| 15 | The numb pool | 6101 disconnecting switch | Grounding switch | 72.1 | Situation is fine | No. 4 |
| 16 | The numb pool | 6103 disconnecting switch | Grounding switch | 86.7 | Situation is fine | No. 4 |
According to DL/T475-2017 " earthing or grounding means characterisitic parameter measures directive/guide " judgment criteria, to equipment ground according to ground connection
Resistance has carried out following classification: 1. equipment test value in order should be below 50m Ω.2. the equipment of 50~200m Ω is (even
Connecing) situation is fine, its variation is preferably paid close attention in later routine test, and the preferably inspection at the appropriate time of important equipment is handled.
3. the equipment (connection) of the Ω of 200m Ω~1 is in poor shape, important equipment should be handled in inspection as early as possible, other equipment are preferably appropriate
When inspection handle.4. the equipment of 1 Ω or more and major network are not connected, inspection should handle as early as possible.5. the test value of independent lightning rod
It should be more than 500m Ω.6. relative value is apparently higher than other equipment in test, and absolute value is little, still right by situation
To.The present embodiment is used for power system device ground connection situation device for fast detecting on-the-spot test in the electricity grid substation of this area
To equipment ground condition detection at 16, discovery ground connection is in order at totally 3, and ground connection situation is still at totally 8, ground connection in poor shape 3
Place is shown at unearthed 2.It follows that the present embodiment can be quickly for power system device ground connection situation device for fast detecting
Detection shows equipment ground situation quality, provides the judgment basis of ground connection situation quality, O&M for power equipment operation maintenance personnel
Personnel are convenient to check adjustment equipment ground in time by display result, avoid overhaul of the equipments personnel and send out in maintenance process
Raw electric shock, especially high-rise working and the induced electricity of voltage levels equipment are hurted sb.'s feelings, and safety is good, result is simple, using just
It is prompt, easy to carry.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (6)
1. one kind is grounded situation device for fast detecting for power system device, it is characterised in that: including shell (1) and be set to outer
Test circuit unit in shell, the test circuit unit include internal battery module (2), constant-current source output module (3), voltage
Measurement module (4) and central control unit (5), the input terminal phase of the internal battery module (2) and constant-current source output module (3)
Even, current measurement module is had on the constant-current source output module (3), the central control unit (5) includes interconnected
Controller, display screen and low-tension supply, the low-tension supply are connected with internal battery module (2), the current measurement module,
Voltage measurement module (4) is connected with controller respectively.
2. according to claim 1 be grounded situation device for fast detecting for power system device, it is characterised in that: described
The output end of constant-current source output module (3) includes positive current delivery outlet (31) and negative current delivery outlet (32), voltage measurement module
(4) output end includes positive voltage detection hole (41) and negtive voltage detection hole (42), the positive current delivery outlet (31), negative current
Delivery outlet (32), positive voltage detection hole (41), negtive voltage detection hole (42) are arranged on shell (1).
3. according to claim 2 be grounded situation device for fast detecting for power system device, it is characterised in that: described
Both positive current delivery outlet (31), positive voltage detection hole (41) are connected with shared positive Insulation test line (6), and the positive insulation
The end of p-wire (6) has positive wire clamp (61)；Both negative current delivery outlet (32), negtive voltage detection hole (42) are connected with altogether
Negative Insulation test line (7), and the end of the negative Insulation test line (7) has cathode wire clamp (71).
4. according to claim 3 be grounded situation device for fast detecting for power system device, it is characterised in that: described
Positive Insulation test line (6) and negative Insulation test line (7) include two cables, the anode wire clamp (61) and cathode wire clamp (71)
It include two metal clips, the end of the metal clip is equipped with insulation sleeve, two cables of the positive Insulation test line (6)
In cable one end by positive current plug (62) connect conducting, the other end and anode wire clamp with positive current delivery outlet (31)
(61) a metal clip connects conducting, and another cable one end passes through positive voltage plug (63) and positive voltage detection hole (41)
Connection is connected, the other end connect conducting with another metal clip of positive wire clamp (61), and the two of the negative Insulation test line (7)
A cable one end connect conducting, the other end and cathode with negative current delivery outlet (32) by negative current plug (72) in root cable
One metal clip of wire clamp (71) connects conducting, and another cable one end passes through negative voltage plug (73) and negtive voltage detection hole
(42) another metal clip of connection conducting, the other end and cathode wire clamp (71), which connects, is connected.
5. according to claim 3 be grounded situation device for fast detecting for power system device, it is characterised in that: described
The middle section of positive Insulation test line (6) is the coil spring shape of retractable.
6. according to claim 3 be grounded situation device for fast detecting for power system device, it is characterised in that: described
The middle section of negative Insulation test line (7) is the coil spring shape of retractable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821105898.9U CN208580172U (en) | 2018-07-12 | 2018-07-12 | One kind being grounded situation device for fast detecting for power system device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821105898.9U CN208580172U (en) | 2018-07-12 | 2018-07-12 | One kind being grounded situation device for fast detecting for power system device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161316A (en) * | 2019-06-28 | 2019-08-23 | 宁夏中科天际防雷股份有限公司 | One kind is without external power supply, efficient jamproof smart grounding electrical resistance monitoring instrument |
| CN110221133A (en) * | 2019-06-17 | 2019-09-10 | 国网湖南省电力有限公司 | A kind of quick phasing adjustement of electric system high-tension line and its application method |
| CN112903141A (en) * | 2021-01-18 | 2021-06-04 | 浙江华电器材检测研究所有限公司 | Device and method for measuring contact resistance and highest temperature of insulation piercing connector |
-
2018
- 2018-07-12 CN CN201821105898.9U patent/CN208580172U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221133A (en) * | 2019-06-17 | 2019-09-10 | 国网湖南省电力有限公司 | A kind of quick phasing adjustement of electric system high-tension line and its application method |
| CN110161316A (en) * | 2019-06-28 | 2019-08-23 | 宁夏中科天际防雷股份有限公司 | One kind is without external power supply, efficient jamproof smart grounding electrical resistance monitoring instrument |
| CN112903141A (en) * | 2021-01-18 | 2021-06-04 | 浙江华电器材检测研究所有限公司 | Device and method for measuring contact resistance and highest temperature of insulation piercing connector |
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