CN109193403A - A kind of electrical test low-voltage intelligent power supply box - Google Patents
A kind of electrical test low-voltage intelligent power supply box Download PDFInfo
- Publication number
- CN109193403A CN109193403A CN201810967426.2A CN201810967426A CN109193403A CN 109193403 A CN109193403 A CN 109193403A CN 201810967426 A CN201810967426 A CN 201810967426A CN 109193403 A CN109193403 A CN 109193403A
- Authority
- CN
- China
- Prior art keywords
- power supply
- supply box
- electrical test
- voltage
- cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of electrical test low-voltage intelligent power supply box, including cabinet, it is provided on cabinet and the integrally formed case lid of cabinet；The place that heals up of case lid and cabinet is provided with capillary groove；Box house is divided into power supply line holding tank and electric mounting bin；The disk for covering notch is provided on the notch of electric mounting bin；The electrical test low-voltage intelligent power supply box is in the damage for thoroughly solving valuable test apparatus equipment caused by due to misconnection experiment power supply on power supply；The generation for avoiding test apparatus operator accident of human electric shock simultaneously, improves the personal safety of test operator；The intelligent prompt of low-voltage intelligent power supply box further improves site safety management level.
Description
Technical field
The present invention relates to maintenance of electrical equipment technical field, in particular to a kind of electrical test low-voltage intelligent power supply box.
Background technique
The development of electrical test low-voltage intelligent power supply box, to the annual maintenance of electrical equipment experiment work of State Grid Corporation of China
Personal safety, test apparatus equipment safety are further ensured that and are improved.
Traditional checking experiment low-tension supply case is simple, the larger cabinet without water-proof function nothing but, configures in inside
There are two-way disconnecting link, electric leakage protector and multiple three holes or two hole socket.Original low pressure test (LPT) power supply box, shortcoming: 1)
Power box body prevents that colliding with property is poor, cracky and leakproofness difference not rainwater-proof；2) power supply box to the power supply of access without identify hand over,
DC voltage, frequency and prompt warning function.Because the input power of intelligent test apparatus equipment is alternating current 220V, through transformer
After Transformer Rectifier, it is supplied to each module operating voltage of instrument and equipment and electric current.If misconnection enters DC power supply (station power supply
Same case status is set there are AC and DC is mixed), the transformer winding of intelligent tester equipment working power can be made to burn, and then can be after
Continuous destructive test instrument and equipment respectively samples and logic module, and tens of thousands of or even hundreds of thousands smart electronics test apparatus equipment is caused to damage
Evil is scrapped, and has seriously affected going on smoothly or being delayed interruption maintenance plan for interruption maintenance experiment work, or even to power grid
Safe operation leaves hidden danger, and enterprise increases financial burden thus；3) original low pressure test (LPT) power supply box does not set protective grounding terminal,
In the case that the shell of intelligent test apparatus equipment cannot be preferably grounded, since the defective that test apparatus itself occurs is leaked
Tested device voltage jump, is caused to test apparatus caused by powering off suddenly in electricity, the induced voltage under strong electrical field or test
Counterattack voltage cannot leak into the earth by protective grounding, can directly threaten the personal safety of test apparatus operator.
Summary of the invention
The object of the present invention is to provide a kind of electrical test low-voltage intelligent power supply boxs.
For this purpose, technical solution of the present invention is as follows:
A kind of electrical test low-voltage intelligent power supply box, including cabinet are provided with and the integrally formed case lid of cabinet on cabinet；
The place that heals up of case lid and cabinet is provided with capillary groove；Box house is divided into power supply line holding tank and electric mounting bin；Electricity
The disk for covering notch is provided on the notch of device installation bin；
Input power indicator light, combined floodgate work light, protective grounding terminal and liquid crystal display are provided in the disk
Screen；Input power indicator light, combined floodgate work light, protective grounding terminal and liquid crystal display are all connected to electric mounting storage
Cpu data processing center in slot.
Further, the power input on the electrical test low-voltage intelligent power supply box and cpu data processing center
Between be provided with voltage to frequency converter.
Further, it is additionally provided with direct current between the power input and electric voltage frequency converter and disconnects protector.
Further, it is provided with ground resistance self-testing circuit on the protective grounding terminal and ground resistance overflows protection
Circuit.
Further, dynamic loudspeaker is additionally provided in the disk.
Compared with prior art, which thoroughly solves on power supply because electricity is tested in misconnection
Source and caused by valuable test apparatus equipment damage；The generation of test apparatus operator accident of human electric shock is avoided simultaneously,
Improve the personal safety of test operator；The intelligent prompt of low-voltage intelligent power supply box further improves site safety pipe
Reason is horizontal.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of electrical test low-voltage intelligent power supply box provided by the invention.
Fig. 2 is the overall structure figure of the electrical test low-voltage intelligent power supply box.
Fig. 3 is the disk structure schematic diagram of the electrical test low-voltage intelligent power supply box.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described further, but following embodiments are absolutely not to this hair
It is bright to have any restrictions.
Embodiment 1:
A kind of electrical test low-voltage intelligent power supply box, including cabinet are provided with and the integrally formed case lid of cabinet on cabinet；
The place that heals up of case lid and cabinet is provided with capillary groove；The design of the cabinet can satisfy field work needs, avoid electrical test
Low-tension supply case collides with damage, watered and wetting；Box house is divided into power supply line holding tank and electric mounting bin；Electric appliance peace
Fill the disk for being provided on the notch of bin and covering notch；
Input power indicator light, combined floodgate work light, protective grounding terminal and liquid crystal display are provided in the disk
Screen；Protective grounding terminal is that the electrification of test apparatus device housings injures operator in order to prevent；Liquid crystal display is for showing
Whether supply voltage, frequency and protective grounding resistance are qualified；Input power indicator light, combined floodgate work light, protective grounding
Son and liquid crystal display are all connected to the cpu data processing center in electric mounting bin；Wherein for the ease of difference, input
Power supply indicator and combined floodgate work light are respectively adopted red and green two different colors of LED light, in the disk
It is additionally provided with dynamic loudspeaker, two-phase 10A open-type safety socket, 16A electric leakage protector, three holes and two spring hole scokets.
When connecting low-tension supply progress high-potting, low-voltage intelligent power supply box can issue suggestion voice " high-potting
In, please don't be close ".In view of during applied voltage test when design, when have other staff passing, for other people personal safety
Specially design this function.Principle is the lower mouth access electric current relay in electric leakage protector, when starting high-potting instrument is set
When standby, (instrument operating current is much larger than this current value) electric current relay movement, CPU when instrument operating current is more than 15-20mA
Data processing centre is connected to instruction, provides speech trigger signal to voice module, and then dynamic loudspeaker issues voice prompting.
It is provided between power input and cpu data processing center on the electrical test low-voltage intelligent power supply box
Voltage to frequency converter；It is additionally provided with direct current between the power input and electric voltage frequency converter and disconnects protector.Electricity
After pulse signal is passed to cpu data processing center by voltage-frequency rate converter, voltage, frequency signal enter pair of liquid crystal display
Input terminal is answered, LCD screen would indicate that voltage (V) and frequency (Hz), and number display remains into a position；If the voltage of input is
DC voltage, cpu data processing center can also provide speech trigger signal to voice module, and the output end access of voice module is micro-
Type dynamic speaker can issue suggestion voice " access DC power supply ".The non-papery of loudspeaker diaphragm materials is conducive to field work
Humidity variation under environment will not influence normal, clearly sound effect, loudspeaker outer dimension 36*5.0mm, 4 Ω of impedance, function
Rate 1W；To prevent testing crew under the prompt of prompt input direct-current voltage, if continuing violation operation, in the input terminal of power supply,
It is also devised with direct current and disconnects protection.The Sustainable use misconnection DC power supply, by dividing power supply as the protective relay
Operating voltage, microswitch relay act winding and connect operating voltage, and electromagnetic switch, which is attracted, opens two pairs of normally closed contacts disconnections
DC power supply ensure that test apparatus is set and not damaged and scrapped by DC voltage.If plant-grid connection is correct (alternating current 220V), because
AC power source is added on relay direct current winding, and biggish AC impedance and pressure drop can be presented, and makes actuating of relay winding can not
Regular event, realizes logical exchange using this characteristic, the purpose for the direct current that breaks.Microswitch relay model are as follows: T90-
12VDC-TL-B, has two pairs of normally-closed contacts, and contact rated operational current 30A, rated operational voltage exchange 240V, coil working
Voltage DC DC12V.
For guarantee access protective ground wire connect ground electricity resistance≤10 Ω requirement, set on the protective grounding terminal
It is equipped with ground resistance self-testing circuit and ground resistance overflows and protects circuit；When the ground resistance of self-testing circuit discovery ground line is greater than
When specified value, protection circuit can disconnect working power automatically, and while disconnecting working power, cpu data processing center provides language
Sound trigger signal is to voice module, and loudspeaker can issue " check protection ground connection " prompt at this time.
Ground resistance self-testing circuit is to take operating voltage in the input terminal of intelligent power case, is depressured through miniature transformer
To 12V, one end is concatenated by protective resistance, DC relay with protective grounding after full-wave rectification；The other end and AC power source zero
The zero curve mark end of line identification module connects, and direct current power source portion is made to form performance loop.It is computed and works as the straight over the ground of earthing pole
When stream electricity≤10 Ω of resistance, ground resistance from survey time Lu Zhongtong mistake≤10mA DC current, this electric current exactly guarantee direct current after
The smallest action current of electric appliance, the actuating of relay just can guarantee that two normally opened contacts are closed, connects the exchange of AC intermediate relay
Control circuit is closed AC intermediate relay two to normally opened contact, and the input power for connecting low-voltage intelligent power supply box is sent to leakage
Electric protector it is suitable for reading, experiment power supply can be sent to each socket by this moment closing electric leakage protector.If intelligent power case misconnection
380V power supply, because of the input terminal in power supply box, design has AC power source zero curve identification module, even if staff does not have found to input
Voltage error continues operation and closes electric leakage protector switch, will not send power supply to each socket.This is because 380V power supply does not have
There is zero curve, so DC circuit part does not constitute performance loop, make DC relay cisco unity malfunction, can not make to control friendship
Intermediate relay movement is flowed, so 380V power supply will not be sent to closing electric leakage protector each socket；If ground line
When ground resistance>10 Ω, the DC current of ground resistance self-testing circuit will<10mA, it is the smallest DC relay cannot to be reached
Action current, so DC relay will not act.
Ground resistance self-testing circuit operating current selects 10mA, is the electric leakage protector for considering station power supply box
Action current 30mA, and ground resistance self-testing circuit is to constitute circuit over the ground, is unlikely to the electric leakage protector of maintenance power box
Breaking is acted, influences to work normally.
Claims (5)
1. a kind of electrical test low-voltage intelligent power supply box, which is characterized in that including cabinet, be provided on cabinet with cabinet one at
The case lid of type；The place that heals up of case lid and cabinet is provided with capillary groove；Box house is divided into power supply line holding tank and electric mounting
Bin；The disk for covering notch is provided on the notch of electric mounting bin；
Input power indicator light, combined floodgate work light, protective grounding terminal and liquid crystal display are provided in the disk；It is defeated
Enter power supply indicator, combined floodgate work light, protective grounding terminal and liquid crystal display to be all connected in electric mounting bin
Cpu data processing center.
2. electrical test low-voltage intelligent power supply box according to claim 1, which is characterized in that the electrical test low pressure
Voltage to frequency converter is provided between power input on power supply box and cpu data processing center.
3. electrical test low-voltage intelligent power supply box according to claim 2, which is characterized in that the power input with
It is additionally provided with direct current between electric voltage frequency converter and disconnects protector.
4. electrical test low-voltage intelligent power supply box according to claim 3, which is characterized in that be arranged on protective grounding terminal
There are ground resistance self-testing circuit and ground resistance to overflow and protects circuit.
5. electrical test low-voltage intelligent power supply box, feature described in claim exist according to claim 1~any one of 4
In being additionally provided with dynamic loudspeaker in the disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810967426.2A CN109193403A (en) | 2018-08-23 | 2018-08-23 | A kind of electrical test low-voltage intelligent power supply box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810967426.2A CN109193403A (en) | 2018-08-23 | 2018-08-23 | A kind of electrical test low-voltage intelligent power supply box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109193403A true CN109193403A (en) | 2019-01-11 |
Family
ID=64919686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810967426.2A Pending CN109193403A (en) | 2018-08-23 | 2018-08-23 | A kind of electrical test low-voltage intelligent power supply box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109193403A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014428U (en) * | 2011-03-04 | 2011-10-19 | 浙江省电力公司台州电业局 | Multi-function portable test power box |
| CN103777112A (en) * | 2014-01-28 | 2014-05-07 | 国网山东昌乐县供电公司 | Test instrument grounding detection warning device |
| CN205565468U (en) * | 2016-02-25 | 2016-09-07 | 国家电网公司 | Many power supply boxs for function test |
| CN108092155A (en) * | 2018-01-19 | 2018-05-29 | 国家电网公司 | Power supply box |
-
2018
- 2018-08-23 CN CN201810967426.2A patent/CN109193403A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014428U (en) * | 2011-03-04 | 2011-10-19 | 浙江省电力公司台州电业局 | Multi-function portable test power box |
| CN103777112A (en) * | 2014-01-28 | 2014-05-07 | 国网山东昌乐县供电公司 | Test instrument grounding detection warning device |
| CN205565468U (en) * | 2016-02-25 | 2016-09-07 | 国家电网公司 | Many power supply boxs for function test |
| CN108092155A (en) * | 2018-01-19 | 2018-05-29 | 国家电网公司 | Power supply box |
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Application publication date: 20190111 |
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| WD01 | Invention patent application deemed withdrawn after publication |