CN201311479Y - Intelligent low-voltage line surplus current protective device field tester - Google Patents
Intelligent low-voltage line surplus current protective device field tester Download PDFInfo
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- CN201311479Y CN201311479Y CNU2008202302557U CN200820230255U CN201311479Y CN 201311479 Y CN201311479 Y CN 201311479Y CN U2008202302557 U CNU2008202302557 U CN U2008202302557U CN 200820230255 U CN200820230255 U CN 200820230255U CN 201311479 Y CN201311479 Y CN 201311479Y
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- field tester
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Abstract
The utility model relates to an intelligent low-voltage line surplus current protective device field tester, belonging to the special-purpose testing equipment field, and comprises a main frame, an insulated extension arm, a take-up device, an earthed pole and connecting lines. The insulated extension arm and the earthed pole are connected with a live wire jack and an earth wire jack by connecting lines, a circuit board is mounted in a shell body of the main frame, the surface is mounted with a display screen, a power indicating lamp, a table zone or a home conversion press-button, the circuit board is composed of a MCU software artificial circuit, a display circuit, a sampling circuit and a protective circuit and the like. Operators only need to contact measured lines on ground by the insulated extension arm, which can judge whether a protective device is damaged and can measure action current values of the earth leakage protective device. The problems that people need to up-rise to open a control cabinet of the protective device and press the inspection efficiency of a trial press-button of the earth leakage protective device is low, and the uprising contact live-wire equipment are not safe are solved. The field tester has quick measurement and saving labor, in particular to operations applicable to field situations.
Description
Technical field:
The utility model relates to a kind of intelligent low-pressure circuit Aftercurrent protecting equipment field tester, belongs to the special test equipment field of Aftercurrent protecting equipment in the low-voltage power line.
Background technology:
In order to guarantee the high efficient and reliable operation of platform district, rural area electrical network; in case seriously electric leakage of circuit, instant earthing or electric shock accidents and hook stealing take place; can excise faulty line apace; the general function of automatically cutting off that adopts integrated residual current circuit breaker and separate type (be Aftercurrent protecting equipment, be commonly called as earth leakage protector) to use electric line when realizing leaking electricity of low-voltage circuit.During less than specified setting working value, Aftercurrent protecting equipment can not produce any action at residual current, but this moment with also may having hidden danger or fault in the electric line, and link up with electricity filching behavior.The hook electricity filching behavior generally has two kinds: the one, setting the following stealing of protection working value, the 2nd, during the akinesia of earth leakage protective device fault or collusion from both within and without Aftercurrent protecting equipment is withdrawed from the stealing of big electric current hook.If untimely processing is so long-term, will cause the expansion of a large amount of electric energy losses or line fault.In addition; sometimes because of the electricity consumption line electrical leakage; do not close again after the earth leakage protective device automatic cutout; the user often thinks it is that earth leakage protective device has damaged by mistake; be actually with electric line and have residual current (being leakage current); cause earth leakage protective device not close, the user also just can not in time find and fix a breakdown.
At present, a lot of areas are relatively backward for the on-the-spot detection mode of aftercurrent action protecting equipment, the mode that most employing is manually ascended a height is opened the protective device switch board, pressing the trial jump button of earth leakage protective device checks, adopt the leakage switch tester of purchasing on the market to carry out the scene and detect, there is following shortcoming in such detection mode, the inconvenience of ascending a height when detecting on the one hand, efficient is low, and contact electrification equipment also is absolutely unsafe; On the other hand, commercially available leakage switch tester range is little, has only 300 milliamperes, easily heating, and the present much earth leakage protective device that power are bigger is energy measurement not; And need artificial gearshift, inconvenient operation can not continuous working, needs the external connection battery power supply simultaneously, and the failure rate height is fragile.
Therefore, be badly in need of a kind of convenient and practical, intelligent and high-efficiency at present, and can make the testing staff stand in the low-voltage circuit Aftercurrent protecting equipment testing tool of on-line testing on the ground.Use of the routine test of this instrument, in time find and fix a breakdown, reduce the fluctuation that causes electrical network because of the Aftercurrent protecting equipment frequent movement electrical network, thus guarantee power grid security, economy, reliably, operation efficiently.
Summary of the invention:
The purpose of this utility model is: provide a kind of operating personnel only to need on ground by insulation expansion link contact test line; just can be to detecting automatically with the online residual current in the electric line; measure electric current and can reach (0-1080) milliampere; need not gear shift, dispense with outer connecting power or internal cell power supply; the automaticity height, the intelligent low-pressure circuit Aftercurrent protecting equipment field tester that the Current Regulation model is big.
The utility model is to realize above-mentioned purpose by following technical solution:
A kind of intelligent low-pressure circuit Aftercurrent protecting equipment field tester, it is by main frame, and expansion link insulate, ground rod, the main frame fixed support, spooler and connecting line constitute, and it is characterized in that: the insulation expansion link is connected with ground wire jack with the firewire jack of main frame respectively by connecting line with ground rod; In the housing of main frame circuit board is housed, surface of shell is equipped with display screen, platform district or family protects conversion knob and power light.
Described circuit board is by MCU software emulation circuit, power circuit, power indicating circuit, display circuit, sample circuit, current control circuit, and holding circuit and software upgrading circuit are formed; The MCU artificial circuit is made of IC1, C1, C2, CY, the current simulations control signal of single-chip microcomputer 19 pin output is sent into Q1, Q2 and is carried out processing and amplifying, realize 1080 milliamperes emulation leakage current, 20 pin of single-chip microcomputer connect power circuit, and 2,4 pin of single-chip microcomputer are serial communication interface.
Described insulation expansion link microcephaly is equipped with metal contact.
Described insulation expansion link major part is shaped on spooler.
One side of described main frame is shaped on the fixed mount mounting hole.
The utility model beneficial effect compared with prior art is:
1, in the test process, operating personnel contact test line on ground by the insulation expansion link, just can full-automatic on-line testing earth leakage protective device action current.Remove employing from and manually ascend a height and open the protective device switch board, press the trial jump button inspection of earth leakage protective device, inefficiency can not be tested the protective device action current, the unsafe problem of contact electrification equipment.This tester can be finished the online testing of a circuit in 3 minutes, and was fit to operation under the open-air situation.
2, utilize test line to obtain working power, dispense with outer connecting power or internal cell power supply, below the quiescent current 6mA, below the power consumption 1.32W, and the LCD demonstration does not need the separate outer powered battery yet.
3, adopt the stepless automatic simulation circuit of single-chip microcomputer, steadily wide region simulation current residual electric current makes the Aftercurrent protecting equipment tripping operation move, and makes things convenient for the working condition and the action current value of intuitive judgment Aftercurrent protecting equipment.
4, can not on-line testing Aftercurrent protecting equipment action current; as long as the protective device outlet is disconnected; test pencil is connected to Aftercurrent protecting equipment inlet wire and leading-out terminal, crosses over zero-sequence transformer and just can measure not online actions electric current (promptly the school of Aftercurrent protecting equipment being tried).
5, adopt the MCU single-chip microcomputer, need not manual shift and power switch, fluid drive is measured range of current and can be reached the 0-1080 milliampere, and light, practical, antijamming capability is strong.
Description of drawings
Fig. 1 is the structural representation of intelligent low-pressure circuit Aftercurrent protecting equipment field tester;
Fig. 2 is the front view of intelligent low-pressure circuit Aftercurrent protecting equipment field tester main frame;
Fig. 3 is the side view of intelligent low-pressure circuit Aftercurrent protecting equipment field tester main frame;
Fig. 4 is the cut-open view of intelligent low-pressure circuit Aftercurrent protecting equipment field tester main frame;
Fig. 5 is the circuit block diagram of intelligent low-pressure circuit Aftercurrent protecting equipment field tester;
Fig. 6 is the circuit diagram of intelligent low-pressure circuit Aftercurrent protecting equipment field tester;
Among the figure: 1, main frame, 2, the insulation expansion link, 3, ground rod, 4, metal contact, 5, display screen, 6, power light, 7, firewire jack, 8, ground wire jack, 9, connecting line, 10, spooler, 11, circuit board, 12, the software upgrading socket, 13, platform district or family protect the conversion knob, 14, main frame fixed support, 15, the fixed mount mounting hole.
Embodiment:
This intelligent low-pressure circuit Aftercurrent protecting equipment field tester is by main frame 1, insulation expansion link 2, ground rod 3 and connecting line 9 constitute, insulation expansion link 2 and ground rod 3 by connecting line 9 respectively with main frame 1 on firewire jack 7 be connected with ground wire jack 8; Fixed mount 14 is connected with the fixed mount mounting hole 15 of main frame 1; circuit board 11 is housed in the housing of main frame 1, and circuit board 11 is formed (referring to accompanying drawing 3,5,6) by MCU software emulation circuit, power circuit, sample circuit, display circuit, power indicating circuit, current control circuit, holding circuit and software upgrading circuit.Surface of shell is equipped with display screen 5 and power light 6.Insulation expansion link 2 adopts epoxy resin and glass fiber reinforced plastics composite material to make, and metal contact 4 (referring to accompanying drawing 1-2) is equipped with in insulation expansion link 2 terminations.
During work; earlier connecting line 9 is taken out from spooler 10; be connected with the metal contact 4 of insulation on the expansion link 2 with ground rod 3 respectively; again the connecting line on the ground rod 39 is inserted ground wire jack 8; the connecting line 9 of metal contact 4 inserts firewire jack 7 on the insulation expansion link 2; the metal contact 4 of expansion link 2 terminations of will insulating then contacts with test line; tester utilizes test line to obtain working power; by the full-automatic earth leakage protective device action current on the on-line testing circuit of display screen 5, then whether the decidable protective device damages operating personnel on the ground.The testing staff need not to climb the trial jump button inspection of pressing earth leakage protective device on the switch board of Aftercurrent protecting equipment, need not ascend a height, and is easy to use, safe.
This low-voltage circuit aftercurrent action protecting equipment field tester can also not on-line testing Aftercurrent protecting equipment action current; during test; only the outlet of protective device need be disconnected; with the inlet wire and the leading-out terminal of test pencil access Aftercurrent protecting equipment, cross over zero-sequence transformer and just can measure not online actions electric current (promptly the school of Aftercurrent protecting equipment being tried).
The circuit working principle of this low-voltage circuit Aftercurrent protecting equipment field tester circuit board 11 is; IC1 in the circuit, C1, C2, CY, composition scm software control section; C1, C2, CY provide clock oscillation circuit for single-chip microcomputer; the current simulations control signal of the 19 pin output of single-chip microcomputer is sent into Q1, Q2 and is carried out processing and amplifying, realizes 1080 milliamperes emulation leakage current.R4 is the Q1 pull-up resistor, and R3, R5 are Q1, Q2 current-limiting resistance, and MY31 is a voltage dependent resistor (VDR), and protection Q2 crest voltage is not breakdown.R1, R2 are emulation leakage current maximum limit leakage resistance, and R1 is the high-power Aftercurrent protecting equipment test in a platform district usefulness when K is closed, and the maximum current limit of test is at 1080 milliamperes; Be family expenses residual current protecting test usefulness when K disconnects, the test maximum current limit is at 40 milliamperes.D3, IC3, C4 form the 9V stabilized voltage supply, show for LCD and use.R6 is the current-limiting resistance of light emitting diode D2, and R6, D2 form the power light circuit; R7 is the dividing potential drop sampling resistor, for the signal circuit of LCD electric current demonstration.D1 is a commutating circuit, for the electric power loop of Q2 emulation leakage current.The recoverable protection device of RX110, holding circuit is not by short circuit when circuit breaks down.Power transformer T1 provides 2 tunnel low-tension supplies power supplies road to use, and one the tunnel provides 5 volts of power supplys to single-chip microcomputer, and another road provides 9 volts of power supplys to the LCD display circuit.2,4 pin of IC1 are that serial communication is connected with interface 14, the convenient software upgrading usefulness that realizes.
This software design can be from the full-automatic emulation of 0-1080 milliampere; when intelligent residual current protective device tester line attachment; utilize test line to obtain working power; the single-chip microcomputer 2 second time of initialization this moment; begin the full-automatic emulation of 0-1080 milliampere then, the time is 58 seconds, after the time reaches 60 seconds; Automatic Program is returned original state zero, EOP (end of program).
Claims (5)
1, a kind of intelligent low-pressure circuit Aftercurrent protecting equipment field tester, it is by main frame (1), insulation expansion link (2), ground rod (3), connecting line (9), spooler (10) and main frame fixed support (14) constitute, and it is characterized in that: insulation expansion link (2) is connected with ground wire jack (8) with the firewire jack (7) of main frame (1) respectively by connecting line (9) with ground rod (3); Circuit board (11) is housed in the housing of main frame (1), and surface of shell is equipped with display screen (5), and switching button (13) is protected by power light (6) He Tai district or family.
2, intelligent low-pressure circuit Aftercurrent protecting equipment field tester according to claim 1, it is characterized in that: described circuit board (11) is by MCU software emulation circuit, power circuit, power indicating circuit, display circuit, sample circuit, and current control circuit, holding circuit and software upgrading circuit are formed; MCU software emulation circuit is made of IC1, C1, C2, CY, the current simulations control signal of single-chip microcomputer 19 pin output is sent into Q1, Q2 and is carried out processing and amplifying, realize 1080 milliamperes emulation leakage current, 20 pin of single-chip microcomputer connect power circuit, and 2,4 pin of single-chip microcomputer are serial communication interface.
3, intelligent low-pressure circuit Aftercurrent protecting equipment field tester according to claim 1, it is characterized in that: the microcephaly of described insulation expansion link (2) is equipped with metal contact (4).
4, intelligent low-pressure circuit Aftercurrent protecting equipment field tester according to claim 1, it is characterized in that: described insulation expansion link (2) major part is shaped on spooler (10).
5, intelligent low-pressure circuit Aftercurrent protecting equipment field tester according to claim 1, it is characterized in that: a side of described main frame (1) is shaped on fixed mount mounting hole (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202302557U CN201311479Y (en) | 2008-12-15 | 2008-12-15 | Intelligent low-voltage line surplus current protective device field tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202302557U CN201311479Y (en) | 2008-12-15 | 2008-12-15 | Intelligent low-voltage line surplus current protective device field tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201311479Y true CN201311479Y (en) | 2009-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202302557U Expired - Fee Related CN201311479Y (en) | 2008-12-15 | 2008-12-15 | Intelligent low-voltage line surplus current protective device field tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN201311479Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199396A (en) * | 2015-05-05 | 2016-12-07 | 江苏苏益电器股份有限公司 | Online residual current circuit breaker dynamic characteristic detection device and detection method thereof |
-
2008
- 2008-12-15 CN CNU2008202302557U patent/CN201311479Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199396A (en) * | 2015-05-05 | 2016-12-07 | 江苏苏益电器股份有限公司 | Online residual current circuit breaker dynamic characteristic detection device and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20121215 |