CN203673013U - Low-voltage power supply line detection apparatus - Google Patents
Low-voltage power supply line detection apparatus Download PDFInfo
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- CN203673013U CN203673013U CN201420033545.8U CN201420033545U CN203673013U CN 203673013 U CN203673013 U CN 203673013U CN 201420033545 U CN201420033545 U CN 201420033545U CN 203673013 U CN203673013 U CN 203673013U
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- 230000005540 biological transmission Effects 0.000 description 4
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Abstract
The utility model discloses a low-voltage power supply line detection apparatus including a prompting device, a first intermediate relay, a switch controller, a zero-sequence current transformer, the first intermediate relay includes a first normally closed contact part and a first coil part, the switch controller includes a motion part and a control part, and the zero-sequence current transformer is used for inducting with a line to be detected. When current passes through the line to be detected, the induction electromotive force of the line to be detected can be generated, the prompting device is serially connected with the first normally closed contact part to form a first line, the first coil part is serially connected with the motion part to form a second line, the zero-sequence current transformer is serially connected with the control part to form a closed circuit, and when an electric potential difference is existed between the input end and the output end of the control part of the switch controller, the motion part is controlled to enable the second line to be disconnected. Therefore, the apparatus provided can inspect three phase lines of a three-phase three-wire power supply line at the same time, so that users can know whether the phase lines of the three-phase three-wire power supply line occur grounding phenomena.
Description
Technical field
The utility model relates to supply line's area of maintenance, in particular to low-voltage supply line pick-up unit.
Background technology
Electric energy is as the conventional energy of one, inseparable with work and life.Low voltage three-phase three line ungrounded supply systems are common modes of one of electric energy transmitting, but due to the cause such as working environment and aging circuit, may occur the phenomenon of single-phase earthing, now need timely maintenance, and supply line is normally worked.
The current check low voltage three-phase three earth-free supply lines of the line whether mode of ground connection are, the first circuit power failure of operating a switch one by one, then by manually whether normally working by every circuit of contrast test.
This kind of test mode needs after circuit power-off, just can check one by one, cannot in the situation that switching on, check at circuit, and power-off directly affected normal production and life.
Utility model content
The purpose of this utility model is to provide low-voltage supply line pick-up unit, to solve the above problems.
Low-voltage supply line pick-up unit is provided in embodiment of the present utility model, has comprised prompting device, the first auxiliary reclay, on-off controller and zero sequence current mutual inductor;
The first auxiliary reclay comprises the first normally closed contact part and the first coiler part;
On-off controller comprises action part and control section;
Zero sequence current mutual inductor, for test line mutual inductance, in the time that test line has electric current to pass through, produce the induction electromotive force of test line;
Prompting device is connected with the first normally closed contact part and is formed the first circuit;
The first coiler part is connected with action part and is formed the second circuit;
Zero sequence current mutual inductor is connected with control section and is formed closed-loop path;
In the time having electric potential difference between the input end of the control section of on-off controller and output terminal, control action part disconnects the second circuit.
Preferably, control section is isolating switch, and action part is switch, and isolating switch comprises s operation control integrated circuit and decision circuitry;
S operation control integrated circuit amplifies for the induction current that zero sequence current mutual inductor is produced;
Electric current after s operation control integrated circuit amplifies is by decision circuitry, and electric current after amplifying is while being greater than the current value that decision circuitry sets in advance, and gauge tap disconnects.
Preferably, on-off controller is the second auxiliary reclay, and the second auxiliary reclay comprises the second normally closed contact part and the second coiler part, and action part is the second normally closed contact part, and control section is the second coiler part;
In the time that the two ends of the second coiler part potential-free is poor, controls the second normally closed contact part and disconnect.
Preferably, also comprise power switch;
Connect with the first circuit and the second circuit respectively in one end of power switch, the other end is connected with power supply.
Preferably, prompting device is specifically warning light or sound-producing device.
Preferably, the operating voltage of auxiliary reclay is 380V.
Preferably, zero sequence current mutual inductor comprises:
Two circular arc magnet, press section and zero sequence current mutual inductance circuit that diameter is identical, zero sequence current mutual inductance circuit comprises coil winding, press section comprises handle and by last item,
Zero sequence current mutual inductance circuit is connected with control section and is formed closed-loop path;
At least one magnet is by being rotationally connected by last item and handle;
Coil winding is wrapped on magnet along the length direction of magnet.
Preferably, zero sequence current mutual inductance circuit comprises coil winding, and the number of turn of coil winding is 300-400 circle.
The low-voltage supply line pick-up unit that the utility model embodiment provides, every circuit is being operated a switch successively after power failure with of the prior art, by manually testing again every circuit, and after contrast test data, show that through measuring and calculating the circuit method whether ground connection is detected compares, it comprises prompting device by use, the first auxiliary reclay, on-off controller, the pick-up unit of zero sequence current mutual inductor checks three of phase three-wire three low-voltage supply line phase lines simultaneously, whether can make user recognize in phase three-wire three low-voltage supply line has phase line that grounding phenomenon has occurred, thereby solve deficiency of the prior art.
Accompanying drawing explanation
Fig. 1 shows the low-voltage supply line pick-up unit wiring diagram of the utility model embodiment;
Fig. 2 shows the zero sequence current mutual inductor structural drawing of the low-voltage supply line pick-up unit of the utility model embodiment.
In figure: 101, the first normally closed contact part; 102, prompting device; 103, action part;
104, the first coiler part; 105, control section; 106, zero sequence current mutual inductor; 107, the first auxiliary reclay; 108, on-off controller;
201, magnet; 202, press last item, 203, coil winding; 204, handle.
Embodiment
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
Fig. 1 shows the low-voltage supply line pick-up unit that the utility model embodiment 1 provides, comprise prompting device 102, the first auxiliary reclay 107, on-off controller 108 and zero sequence current mutual inductor 106, the first auxiliary reclay 107 comprises the first normally closed contact part 101 and the first coiler part 104, on-off controller 108 comprises action part 103 and control section 105, zero sequence current mutual inductor 106 for test line mutual inductance, in the time that test line has electric current to pass through, produce the induction electromotive force of test line, prompting device 102 is connected with the first normally closed contact part 101 and is formed the first circuit, the first coiler part 104 is connected with action part 103 and is formed the second circuit, zero sequence current mutual inductor 106 is connected with control section 105 and is formed closed-loop path, in the time having electric potential difference between the input end of the control section 105 of on-off controller 108 and output terminal, control action part 103 disconnects the second circuit.
Prompting device 102 is connected with the first normally closed contact part 101 of the first auxiliary reclay 107 and is formed the first circuit, the first coiler part 104 of the first auxiliary reclay 107 is connected with the action part 103 of on-off controller 108 and is formed the second circuit, and the first circuit is all connected with power supply with the two ends of the second circuit.Wherein prompting device 102 can be light-emitting device, can be also the sound-producing device after energising, can also be other art technology people such as shaking device after energising with known suggestion device.Preferably, suggestion device is pilot lamp, and pilot lamp is a kind of common electric elements, easily changes afterwards in damage.The first circuit and the second circuit are connected on power supply after can be in parallel, also can be that the first circuit and the second circuit are connected respectively on power supply, certainly, the first circuit and the second circuit are connected in parallel, in actual treatment, can make the wiring of circuit simpler, reduce the quantity of wire, and the complexity of line, thereby improved the reliability of single unit system.
Zero sequence current mutual inductor 106 is connected with the control section 105 of on-off controller 108 and is formed closed-loop path.The effect of on-off controller 108 is, in the time that the output terminal of control section 105 and input end have electric potential difference, control action part 103, makes second line broken circuit at action part 103 places.Certainly, control section 105 is specially isolating switch, and action part 103 is specially switch, drives switch to realize the break-make control to the second circuit by isolating switch.On-off controller 108 can be also auxiliary reclay, control section 105 is specially the coiler part of auxiliary reclay, action part 103 is specially the normally closed contact part of auxiliary reclay, drive normally closed contact part to carry out work by coiler part, can also be other known in those skilled in the art can be when input end and output terminal have electric potential difference, the on-off controller 108 of closing switch.The effect of zero sequence current mutual inductor 106 is and test line mutual inductance, in the time that test line has electric current to pass through, to produce the corresponding induction electromotive force with test line.
When zero sequence current mutual inductor 106 and test line mutual inductance, and while having electric current to pass through in circuit-under-test, in zero sequence current mutual inductor 106, can produce with test line in the induction electromotive force that matches.Test line is three phase lines in phase three-wire three low-voltage supply line, but while having a phase line generation Grounding, the electric current of this grounded phase wire is zero, in another two phase lines, the vector of electric current is non-vanishing, using zero sequence current mutual inductor 106 and tested triple-phase line to carry out after mutual inductance, the coil in zero sequence current mutual inductor 106 can produce induction electromotive force.The input end and the output terminal that now form the control section 105 of the on-off controller 108 of closed-loop path with zero sequence current mutual inductor 106 have electric potential difference, the action part 103 of on-off controller 108 is worked, make originally to become off state in the second circuit of channel status, thereby make the two ends of the first coiler part 104 of the first auxiliary reclay 107 from there being the state of electric potential difference to be converted to the poor state of potential-free, and then drive the first normally closed contact part 101 of the first auxiliary reclay 107 to be converted to closure state by off-state, and then make First Line route off-state change closure state into, thereby prompting device 102 is worked, staff can recognize in test line has electric current to pass through, completed the inspection to test line.
The zero sequence current mutual inductor of the low-voltage supply line pick-up unit that the utility model embodiment 2 provides, on the basis of embodiment 1, control section 105 is isolating switch, and action part 103 is switch, and isolating switch comprises s operation control integrated circuit and decision circuitry;
S operation control integrated circuit amplifies for the induction current that zero sequence current mutual inductor 106 is produced;
Electric current after s operation control integrated circuit amplifies is by decision circuitry, and electric current after amplifying is while being greater than the current value that decision circuitry sets in advance, and gauge tap disconnects.
The faradic voltage producing from zero sequence current mutual inductor 106 is not very high, preferably, after s operation control integrated circuit amplifies, just can make isolating switch work, and then make switch be converted to off-state by closure state.Make the two ends potential-free of the first coiler part 104 poor, make the first normally closed contact part 101 be converted to closure state by off-state, make First Line route off state be converted to channel status simultaneously, thereby prompting device 102 is worked, user recognizes the current phasor of this phase three-wire three transmission line of electricity and non-vanishing, namely has a cable grounding at least.Preferably, isolating switch is preferably the isolating switch of DZ47 model, and its operating voltage is applicable to the phase three-wire three low-voltage power supply system that this device is tested, and the isolating switch of relative other models of its energy consumption is lower.
Certainly, on-off controller 108 can also be the second auxiliary reclay, on-off controller 108 is the second auxiliary reclay, the second auxiliary reclay comprises the second normally closed contact part and the second coiler part, action part 103 is the second normally closed contact part, control section 105 is the second coiler part, in the time that the two ends of the second coiler part potential-free is poor, controls the second normally closed contact part and disconnects.The action part 103 of the second auxiliary reclay, namely normally closed contact part and the first coiler part 104 form the second circuit, in the time that zero sequence current mutual inductor 106 produces induction electromotive force, make the coiler part two ends of the second auxiliary reclay form electric potential difference simultaneously, make the second normally closed contact part of the second auxiliary reclay be converted to off-state by closure state simultaneously, make the two ends potential-free of the first coiler part 104 poor, the first normally closed contact part 101 is worked, make First Line route off state be converted to channel status simultaneously, thereby prompting device 102 is worked, user recognizes the current phasor of this phase three-wire three transmission line of electricity and non-vanishing, namely has a cable grounding at least.
When low-voltage supply line pick-up unit does not need to use, should be closed in time, guaranteeing can be because maloperation brings potential safety hazard.On low-voltage supply line pick-up unit, also comprising power switch, connects with the first circuit and the second circuit respectively in one end of power switch, and the other end is connected with power supply.Power switch is connected with the first circuit and the second circuit simultaneously, by control the first switch and then reach the function of controlling the first circuit and the second circuit simultaneously.
Suggestion device is the effect of playing prompting user, and prompting device 102 is specially warning light or sound-producing device.Warning light can be specifically withstand voltage light emitting diode, can be also small filament lamp bubble or neon lamp.Prompting device 102 can also be the device that can sound after energising.
Because this low-voltage supply line pick-up unit is mainly to detect low voltage three-phase three line supply lines, the operating voltage of the first auxiliary reclay 107 should match with the voltage of test line, the ceiling voltage of for example circuit is to exchange 380V, so the operating voltage of the first auxiliary reclay 107 should be 380V.
Fig. 2 shows the zero sequence current mutual inductor structural drawing of the utility model embodiment, for the ease of detecting the supply line of low voltage three-phase three lines, zero sequence current mutual inductor 106 comprises: two circular arc magnet 201 that diameter is identical, press section and zero sequence current mutual inductance circuit, zero sequence current mutual inductance circuit comprises coil winding 203, press section comprises handle 204 and by last item 202, zero sequence current mutual inductance circuit is connected with control section 105 and is formed closed-loop path, at least one magnet 201 is by being rotationally connected by last item 202 and handle 204, coil winding 203 is wrapped on magnet 201 along the length direction of magnet 201.By pressing handle 204, magnet 201 by being rotationally connected by last item 202 and handle 204 is rotated, after rotation, the jaw of magnet 201 opens, test line is positioned in the middle of two magnet 201, when the current phasor of tested phase three-wire three supply line with when non-vanishing, the coil winding 203 that makes to be wrapped on magnet 201 produces induction electromotive force, and then make control section 105 two ends of connecting with zero sequence current mutual inductance circuit also produce induction electromotive force, thereby complete the detection to test line.Certainly, two magnet 201 can, all by being rotationally connected by last item 202 and handle 204, can be also that two magnet 201 are rotationally connected by last item 202 and handle 204 by two respectively.When use, by pressing the handle being rotationally connected with magnet, make this magnet along rotating certain angle by last item, make the jaw amplitude of opening be greater than the power transmission line diameter of circuit to be measured, then the power transmission line of circuit to be measured is placed between two magnet, can start to measure.In the time not needing to use, release handle, makes magnet go back to original position, and the overall volume of zero sequence current mutual inductor is dwindled, and has facilitated circuit is detected and place zero sequence current mutual inductor.
Through actual measurement and calculating, the number of turn of coil winding 203 is 300-400 circle.Preferably, according to the conversion of magnetic circuit magnetic flux and coil wire diameter, and show that through test of many times the number of turn of coil winding 203 is 375 circles, the coil winding 203 of 375 circles, the induction electromotive force producing can be worked by trigger switch controller 108, and make produce induction electromotive force for nature person in safer scope.
The low-voltage supply line pick-up unit that the utility model embodiment provides, the pick-up unit that comprises prompting device, the first auxiliary reclay, on-off controller 108, zero sequence current mutual inductor by use checks three of phase three-wire three low-voltage supply line phase lines simultaneously, whether have phase line grounding phenomenon occurred, thereby solved deficiency of the prior art if can make user recognize in phase three-wire three low-voltage supply line.
These are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. low-voltage supply line pick-up unit, is characterized in that,
Comprise prompting device, the first auxiliary reclay, on-off controller and zero sequence current mutual inductor;
Described the first auxiliary reclay comprises the first normally closed contact part and the first coiler part;
Described on-off controller comprises action part and control section;
Zero sequence current mutual inductor, for test line mutual inductance, in the time that test line has electric current to pass through, produce the induction electromotive force of test line;
Described prompting device is connected with described the first normally closed contact part and is formed the first circuit;
Described the first coiler part is connected with described action part and is formed the second circuit;
Described zero sequence current mutual inductor is connected with described control section and is formed closed-loop path;
In the time having electric potential difference between the input end of the control section of described on-off controller and output terminal, control described action part described the second circuit is disconnected.
2. low-voltage supply line pick-up unit according to claim 1, is characterized in that, described control section is isolating switch, and described action part is switch, and described isolating switch comprises s operation control integrated circuit and decision circuitry;
Described s operation control integrated circuit amplifies for the induction current that described zero sequence current mutual inductor is produced;
Electric current after described s operation control integrated circuit amplifies is by described decision circuitry, and electric current after described amplification is while being greater than the current value that described decision circuitry sets in advance, controls described switch disconnection.
3. low-voltage supply line pick-up unit according to claim 1, it is characterized in that, described on-off controller is the second auxiliary reclay, described the second auxiliary reclay comprises the second normally closed contact part and the second coiler part, described action part is the second normally closed contact part, and described control section is the second coiler part;
In the time that the two ends of described the second coiler part potential-free is poor, controls described the second normally closed contact part and disconnect.
4. low-voltage supply line pick-up unit according to claim 1, is characterized in that, also comprises power switch;
Connect with described the first circuit and described the second circuit respectively in one end of described power switch, the other end is connected with power supply.
5. low-voltage supply line pick-up unit according to claim 1, is characterized in that, described prompting device is specifically warning light or sound-producing device.
6. low-voltage supply line pick-up unit according to claim 1, is characterized in that, the operating voltage of described auxiliary reclay is 380V.
7. low-voltage supply line pick-up unit according to claim 1, is characterized in that, described zero sequence current mutual inductor comprises:
Two circular arc magnet, press section and zero sequence current mutual inductance circuit that diameter is identical, described zero sequence current mutual inductance circuit comprises coil winding, described press section comprises handle and by last item,
Described zero sequence current mutual inductance circuit is connected with described control section and is formed closed-loop path;
Described at least one, magnet is rotationally connected by last item and described handle by described;
Described coil winding is wrapped on described magnet along the length direction of described magnet.
8. low-voltage supply line pick-up unit according to claim 7, is characterized in that, described zero sequence current mutual inductance circuit comprises coil winding, and the number of turn of described coil winding is 300-400 circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420033545.8U CN203673013U (en) | 2014-01-20 | 2014-01-20 | Low-voltage power supply line detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420033545.8U CN203673013U (en) | 2014-01-20 | 2014-01-20 | Low-voltage power supply line detection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN203673013U true CN203673013U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420033545.8U Expired - Fee Related CN203673013U (en) | 2014-01-20 | 2014-01-20 | Low-voltage power supply line detection apparatus |
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| Country | Link |
|---|---|
| CN (1) | CN203673013U (en) |
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2014
- 2014-01-20 CN CN201420033545.8U patent/CN203673013U/en not_active Expired - Fee Related
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Granted publication date: 20140625 Termination date: 20160120 |
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| EXPY | Termination of patent right or utility model |