CN202903864U - Electric leakage current detection device of single-phase AC power supply circuit - Google Patents
Electric leakage current detection device of single-phase AC power supply circuit Download PDFInfo
- Publication number
- CN202903864U CN202903864U CN 201220540701 CN201220540701U CN202903864U CN 202903864 U CN202903864 U CN 202903864U CN 201220540701 CN201220540701 CN 201220540701 CN 201220540701 U CN201220540701 U CN 201220540701U CN 202903864 U CN202903864 U CN 202903864U
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- phase
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- neutral line
- electric leakage
- electrically connected
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- 238000001514 detection method Methods 0.000 title abstract 5
- 230000007935 neutral effect Effects 0.000 claims abstract description 35
- 230000001012 protector Effects 0.000 claims abstract description 25
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 3
- 229910001416 lithium ion Inorganic materials 0.000 claims description 3
- 238000010616 electrical installation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses an electric leakage current detection device of a single-phase AC power supply circuit, solving the problem that a conventional single-phase electric leakage current detection device is complicated in structure and high in cost. The electric leakage current detection device of the single-phase AC power supply circuit is characterized in that air knife-switches(1)are arranged in a phase line (18) and a neutral line (19), and an electric leakage protector (2) and the air knife-switches (1) are in parallel connection with the phase line (18) and the neutral line (19); a phase current transformer (3) is arranged in the phase line (18), and a neutral line current transformer (4) is arranged in the neutral line (19); a residual current transformer (5) is arranged between the phase line (18) and the neutral line (19), the output end of an interface circuit (9) is electrically connected with a single-chip microcomputer(10), and a display (13) is connected on the single-chip microcomputer (10). The electric leakage current detection device of the single-phase AC power supply circuit of the utility model provides a basis for workers to detect and determine whether the action of the electric leakage protector belongs to a maloperation fault.
Description
Technical field
The utility model relates to a kind of leakage current pick-up unit, particularly a kind of leakage current pick-up unit of single-phase ac power supply circuit.
Background technology
In upgrade of rural power grids, for safety utilization of electric power with prevent to use electrification, rural households' power consumer has all been installed the single-phase earth leakage protector.After the electric leakage protector action, if can't judge the reason of action and find out leakage, general disposal route withdraws from electric leakage protector exactly and reuses disconnecting link or isolating switch.Owing to there is not the protection of electric leakage protector, when real generation accident of human electric shock, just can't excise power supply, may cause the generation of personnel's electric shock accident.And there is complex structure in existing single-phase earth leakage current sensing means, the problem of somewhat expensive.
Summary of the invention
The leakage current pick-up unit of a kind of single-phase ac power supply circuit that the utility model provides has solved existing single-phase earth leakage current sensing means and has had complex structure, the problem of somewhat expensive.
The utility model is to solve by the following technical programs above technical matters:
A kind of leakage current pick-up unit of single-phase ac power supply circuit, be included between phase line inlet wire binding post and the phase line outlet binding post and be provided with phase line, between neutral line inlet wire binding post and neutral line outlet binding post, be provided with the neutral line, be provided with the air chopper switch in phase line and the neutral line, electric leakage protector and air disconnecting link switch in parallel are arranged on phase line and the neutral line, be provided with phase current mutual inductor in phase line, the output terminal of phase current mutual inductor is electrically connected with the first input end of interface circuit, be provided with neutral line current transformator at the neutral line, the output terminal of neutral line current transformator is electrically connected with the second input end of interface circuit, between phase line and the neutral line, be provided with residual current transformer, the output terminal of residual current transformer is electrically connected with the 3rd input end of interface circuit, the output terminal of interface circuit is electrically connected with single-chip microcomputer, is connected with display at single-chip microcomputer.
Single-chip microcomputer is electrically connected with mu balanced circuit, and mu balanced circuit is electrically connected with lithium ion battery.
The utility model can be measured the effective value of phase line current, neutral current and residual current simultaneously, provides more information for searching fault, can and judge for staff's inspection whether the electric leakage protector action belongs to the malfunction fault type and offer help.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Embodiment
A kind of leakage current pick-up unit of single-phase ac power supply circuit, be included between phase line inlet wire binding post 14 and the phase line outlet binding post 16 and be provided with phase line 18, between neutral line inlet wire binding post 15 and neutral line outlet binding post 17, be provided with the neutral line 19, be provided with air chopper switch 1 in phase line 18 and the neutral line 19, electric leakage protector 2 is arranged in parallel on phase line 18 and the neutral line 19 with air chopper switch 1, be provided with phase current mutual inductor 3 in phase line 18, the output terminal 6 of phase current mutual inductor 3 is electrically connected with the first input end of interface circuit 9, be provided with neutral line current transformator 4 at the neutral line 19, the output terminal 7 of neutral line current transformator 4 is electrically connected with the second input end of interface circuit 9, between phase line 18 and the neutral line 19, be provided with residual current transformer 5, the output terminal 8 of residual current transformer 5 is electrically connected with the 3rd input end of interface circuit 9, the output terminal of interface circuit 9 is electrically connected with single-chip microcomputer 10, is connected with display 13 at single-chip microcomputer 10.
Mu balanced circuit 12 is electrically connected with single-chip microcomputer 10, interface circuit 9 and display 13 respectively, and mu balanced circuit 12 is electrically connected with lithium ion battery 11.
Interface circuit 9 can be measured the current effective value of current transformer, and the analog current signal that measures is converted into digital signal sends single-chip microcomputer 10 to.
After Monophase electric power user's electric leakage protector action, if it is unsuccessful again to cater to electric leakage protector 2, can after connecing all electrical installations of output terminal of user's electric leakage protector 2, disconnection again cater to user's electric leakage protector once, if cater to still unsuccessful then show and exist two kinds of possibilities, (1) really to have leaky to make the electric leakage protector action; (2) there is fault in user's electric leakage protector.Withdraw from user's electric leakage protector and current monitor is accessed former protector position this moment, isolating switch in elder generation's turn-off current monitor, drop into the electric leakage protector in the current measuring device, if electric leakage protector still moves, illustrate and really have leaky in the circuit, at this moment can drop into isolating switch, observe phase line, the electric current of the neutral line and the effective value of residual current by the liquid crystal display on the monitor panel, and then analyze judgement and search electric leakage point of general and position; If this moment, electric leakage protector no longer moved, then explanation does not exist electric leakage or leakage current less than the action current of protector, can reach a conclusion by monitoring phase line, neutral current and residual current, thereby can judge rapidly whether user's electric leakage protector has normal function, can rapidly judge all for electric leakage protector and the protector that electric leakage action indication is arranged of not electric leakage action indication whether its function is normal.
Claims (2)
1. the leakage current pick-up unit of a single-phase ac power supply circuit, be included between phase line inlet wire binding post (14) and the phase line outlet binding post (16) and be provided with phase line (18), between neutral line inlet wire binding post (15) and neutral line outlet binding post (17), be provided with the neutral line (19), be provided with air chopper switch (1) in phase line (18) and the neutral line (19), electric leakage protector (2) is arranged in parallel on phase line (18) and the neutral line (19) with air chopper switch (1), it is characterized in that, be provided with phase current mutual inductor (3) in phase line (18), the output terminal (6) of phase current mutual inductor (3) is electrically connected with the first input end of interface circuit (9), be provided with neutral line current transformator (4) at the neutral line (19), the output terminal (7) of neutral line current transformator (4) is electrically connected with the second input end of interface circuit (9), between phase line (18) and the neutral line (19), be provided with residual current transformer (5), the output terminal (8) of residual current transformer (5) is electrically connected with the 3rd input end of interface circuit (9), the output terminal of interface circuit (9) is electrically connected with single-chip microcomputer (10), is connected with display (13) at single-chip microcomputer (10).
2. the leakage current pick-up unit of a kind of single-phase ac power supply circuit according to claim 1 is characterized in that, single-chip microcomputer (10) is electrically connected with mu balanced circuit (12), and mu balanced circuit (12) is electrically connected with lithium ion battery (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220540701 CN202903864U (en) | 2012-10-22 | 2012-10-22 | Electric leakage current detection device of single-phase AC power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220540701 CN202903864U (en) | 2012-10-22 | 2012-10-22 | Electric leakage current detection device of single-phase AC power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903864U true CN202903864U (en) | 2013-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220540701 Expired - Fee Related CN202903864U (en) | 2012-10-22 | 2012-10-22 | Electric leakage current detection device of single-phase AC power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202903864U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727982A (en) * | 2017-11-29 | 2018-02-23 | 国家电网公司 | It is a kind of to realize that the device and method for the experiment that do not have a power failure is protected in leakage by bypass circuit afterflow |
| CN110927623A (en) * | 2019-12-06 | 2020-03-27 | 国网江苏省电力有限公司南通供电分公司 | Power equipment electric leakage detection system |
-
2012
- 2012-10-22 CN CN 201220540701 patent/CN202903864U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727982A (en) * | 2017-11-29 | 2018-02-23 | 国家电网公司 | It is a kind of to realize that the device and method for the experiment that do not have a power failure is protected in leakage by bypass circuit afterflow |
| CN110927623A (en) * | 2019-12-06 | 2020-03-27 | 国网江苏省电力有限公司南通供电分公司 | Power equipment electric leakage detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20181022 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |