CN205123421U - Low voltage network zero line state detection device - Google Patents
Low voltage network zero line state detection device Download PDFInfo
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- CN205123421U CN205123421U CN201520997672.4U CN201520997672U CN205123421U CN 205123421 U CN205123421 U CN 205123421U CN 201520997672 U CN201520997672 U CN 201520997672U CN 205123421 U CN205123421 U CN 205123421U
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- 238000001514 detection method Methods 0.000 title abstract 3
- 230000007935 neutral effect Effects 0.000 claims description 22
- 238000009738 saturating Methods 0.000 claims description 7
- 229940052961 longrange Drugs 0.000 abstract 1
- 230000003211 malignant effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a low voltage network zero line state detection device, zero line current detection ware, zero line thermodetector, environment thermodetector, alarm, communicator all link to each other with data processor, and data processor, alarm and communicator seal in the casing. The utility model has the advantages that: exceeding the default, sending the warning through alarm, notice site work personnel can also send center computer room with alarm information through the communicator, carry out long -range early warning, detect and the early warning when the accident sprouts, can handle rapidly, avoid malignant accident's emergence.
Description
Technical field
The utility model relates to a kind of low-voltage network zero line condition checkout gear.
Background technology
In three-phase four-wire low-voltage electric power system, the effect of zero line is the current potential ensureing zero line when threephase load is asymmetric is zero, to eliminate neutral point potential change, makes each phase voltage keep symmetrical.Have a phase open circuit in three-phase, only can affect this phase load, and can not affect remaining two-phase, the electric equipment be connected in this two-phase still can normally work.If neutral line break, in the asymmetric situation of threephase load, neutral point displacement can be produced, thus cause triphasic potential uneven, some phase voltages are too low, and electric equipment can not normally use, and some phase current potentials are too high, then burn electric equipment, cause huge economic loss and serious social responsibility.
Usual two classes of existing zero line-breaking protector a: class is phase zero (cross or owe) voltage-type; Another kind of is 01 ground voltage types.
The basic functional principle of phase zero voltage-type is: voltage between sampling phase line and zero line, when system is normal, between phase line and zero line, voltage is normal value, i.e. power supply phase voltage, and now, protective device is failure to actuate.When there is broken string in zero line; between phase line with zero line, voltage (i.e. phase one no-voltage) effective value will exceed phase voltage (being called overvoltage) or be less than phase voltage (being called under voltage); reach protective device setting value and make its action; disengagement failure circuit; thus limit the life period of overvoltage or under voltage between PE linear contact lay voltage and phase 1, reach the protection to people and electrical equipment.
The basic functional principle of 01 ground voltage type protective devices is: protective device sampling load neutral point voltage to earth; when there is neutral line break fault, load neutral point produces drift potential; once reach the action setting value of protective device; then through certain time-delay actuator, automatic air-break switch is tripped, thus reach the protection to people and electrical appliance.
Zero line-breaking protector often concentrates on household electrical appliance or certain loads (as motor) protection, and the neutral line break protection paying close attention to distribution line is less; Neutral line break fault before protective device mounting points and can only equipment after protective device mounting points can only be detected; Unrealized distributed monitoring; Cannot judge the neutral line break under load balancing.
Most critical defect, zero line-breaking protector is the one protective device afterwards after neutral line break.
Neutral line break comprises two kinds of situations: outside destroy breaks suddenly, the overheated burning broken string of zero line.
It is the process of a gradual change that zero line blows, if can detect when accident rudiment and early warning, then can process rapidly, avoid the generation of serious accident.
Utility model content
The purpose of this utility model is to provide a kind of low-voltage network zero line condition checkout gear, effectively can solve and not monitor the overheated line that blows of zero line at present, easily cause the problem of serious accident.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of low-voltage network zero line condition checkout gear, comprise neutral line current detector, zero line Temperature Detector, ambient temperature sensor, data processor, alarm device and communicator, described neutral line current detector, zero line Temperature Detector, ambient temperature sensor, alarm device, communicator are all connected with data processor, and described data processor, alarm device and communicator are enclosed in housing.
Preferably, also comprise display, described display is connected with data processor, and described display is fixed on housing; Display can facilitate staff to check current zero line status data at any time.
Preferably, described alarm device comprises stand by lamp and loudspeaker, and described stand by lamp is fixed on housing, and described housing has the saturating range of sound of band penetrable sound hole, described loudspeaker are fixed in the housing at rear, the range of sound; Send alarm warning by sound and light, be arranged in housing by loudspeaker simultaneously, prevent loudspeaker impaired, sound is sent by the penetrable sound hole in the saturating range of sound.
Preferably, the described range of sound is circular, described penetrable sound hole is distributed in the range of sound, the center in the described range of sound is fixed with the support column stretched in housing, the inner walls at the back side, the described range of sound is also fixed with hemispheric echo shell, the centre of sphere of described echo shell overlaps with the center of circle in the saturating range of sound, and the length of described support column is greater than 1/3rd of echo shell diameter and is less than 2/3rds of echo shell diameter, and the sounding face of described loudspeaker is towards the summit of echo shell; Support echo shell, the sound utilizing Principles of Acoustics to be sent by loudspeaker amplifies, under the prerequisite not increasing power and loudspeaker size, improve volume as far as possible.
Compared with prior art, the utility model has the advantages that: by neutral line current detector, zero line Temperature Detector, ambient temperature sensor, zero line and place environment thereof are monitored, these data returned data processors are analysed and compared, if exceed preset value, then given a warning by alarm device, notify field personnel, by communicator, warning information can also be sent to central machine room, carry out distant early warning, detect and early warning when accident rudiment, can process rapidly, avoid the generation of serious accident.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of low-voltage network zero line of the utility model condition checkout gear;
Fig. 2 is the shell structure schematic diagram of a kind of low-voltage network zero line of the utility model condition checkout gear;
Fig. 3 is the structural representation of echo shell in a kind of low-voltage network zero line of the utility model condition checkout gear.
Embodiment
Consult the embodiment that Fig. 1 is a kind of low-voltage network zero line of the utility model condition checkout gear, a kind of low-voltage network zero line condition checkout gear, comprise neutral line current detector 1, zero line Temperature Detector 2, ambient temperature sensor 3, data processor 4, display 8, alarm device 5 and communicator 6, described neutral line current detector 1, zero line Temperature Detector 2, ambient temperature sensor 3, alarm device 5, display 8, communicator 6 is all connected with data processor 4, described data processor 4, alarm device 5 and communicator 6 are enclosed in housing 7, described display 8 is fixed on housing 7, housing 7 can also be fixed on the antenna that communicator 6 connects.
As Fig. 1, shown in Fig. 2, described alarm device 5 comprises stand by lamp 9 and loudspeaker 10, described stand by lamp 9 is fixed on housing 7, described housing 7 has the saturating range of sound 12 of band penetrable sound hole 11, described loudspeaker 10 are fixed in the housing 7 at rear, the range of sound 12, the described range of sound 12 is circular, described penetrable sound hole 11 is distributed in the range of sound 12, the center in the described range of sound 12 is fixed with the support column 13 stretched in housing 7, as shown in Figure 3, housing 7 inwall at the back side, the described range of sound 12 is also fixed with hemispheric echo shell 14, the centre of sphere of described echo shell 14 overlaps with the center of circle in the saturating range of sound 12, the length of described support column 13 is greater than 1/3rd of echo shell 14 diameter and is less than 2/3rds of echo shell 14 diameter, the sounding face of described loudspeaker 10 is towards the summit of echo shell 14.
Adopt a method for early warning for low-voltage network zero line condition checkout gear, comprise the following steps successively:
A, neutral line current detector 1 and zero line Temperature Detector 2 be fixed on need monitoring zero line on, in power transformation box ambient temperature sensor 3 being fixed zero line place or power transformation box, the data returned data processor 4 at regular intervals of neutral line current detector 1, zero line Temperature Detector 2 and ambient temperature sensor 3 monitoring;
B, the electric current in zero line, zero line temperature at that time, neutral line current to be assessed relative to the growth rate of previous moment, the growth rate of the relative previous moment of zero line temperature, when exceeding preset value for above-mentioned one, send warning information by alarm device 5, and pass this warning information back Surveillance center by communicator 6.
Monitored by neutral line current detector 1, zero line Temperature Detector 2, ambient temperature sensor 3 pairs of zero lines and place environment thereof, these data returned data processors 4 are analysed and compared, if exceed preset value, then given a warning by alarm device 5, notify field personnel, by communicator 6, warning information can also be sent to central machine room, carry out distant early warning.
The foregoing is only specific embodiment of the utility model, but technical characteristic of the present utility model is not limited thereto, any those skilled in the art is in field of the present utility model, and the change done or modification are all encompassed among the scope of the claims of the present utility model.
Claims (4)
1. a low-voltage network zero line condition checkout gear, it is characterized in that: comprise neutral line current detector (1), zero line Temperature Detector (2), ambient temperature sensor (3), data processor (4), alarm device (5) and communicator (6), described neutral line current detector (1), zero line Temperature Detector (2), ambient temperature sensor (3), alarm device (5), communicator (6) is all connected with data processor (4), described data processor (4), alarm device (5) and communicator (6) are enclosed in housing (7).
2. a kind of low-voltage network zero line condition checkout gear as claimed in claim 1, it is characterized in that: also comprise display (8), described display (8) is connected with data processor (4), and described display (8) is fixed on housing (7).
3. a kind of low-voltage network zero line condition checkout gear as claimed in claim 1, it is characterized in that: described alarm device (5) comprises stand by lamp (9) and loudspeaker (10), described stand by lamp (9) is fixed on housing (7), described housing (7) is provided with the saturating range of sound (12) of band penetrable sound hole (11), and described loudspeaker (10) are fixed in the housing (7) at the range of sound (12) rear.
4. a kind of low-voltage network zero line condition checkout gear as claimed in claim 3, it is characterized in that: the described range of sound (12) are for circular, described penetrable sound hole (11) is distributed in the range of sound (12), the center in the described range of sound (12) is fixed with the support column (13) stretched in housing (7), housing (7) inwall at the described range of sound (12) back side is also fixed with hemispheric echo shell (14), the centre of sphere of described echo shell (14) overlaps with the center of circle of the saturating range of sound (12), the length of described support column (13) is greater than 1/3rd of echo shell (14) diameter and is less than 2/3rds of echo shell (14) diameter, the sounding face of described loudspeaker (10) is towards the summit of echo shell (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520997672.4U CN205123421U (en) | 2015-12-05 | 2015-12-05 | Low voltage network zero line state detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520997672.4U CN205123421U (en) | 2015-12-05 | 2015-12-05 | Low voltage network zero line state detection device |
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| Publication Number | Publication Date |
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| CN205123421U true CN205123421U (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520997672.4U Active CN205123421U (en) | 2015-12-05 | 2015-12-05 | Low voltage network zero line state detection device |
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| CN (1) | CN205123421U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375636A (en) * | 2015-12-05 | 2016-03-02 | 国网浙江省电力公司丽水供电公司 | Low-voltage distribution network zero-wire state detection apparatus and early warning method |
-
2015
- 2015-12-05 CN CN201520997672.4U patent/CN205123421U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375636A (en) * | 2015-12-05 | 2016-03-02 | 国网浙江省电力公司丽水供电公司 | Low-voltage distribution network zero-wire state detection apparatus and early warning method |
| CN105375636B (en) * | 2015-12-05 | 2018-01-19 | 国网浙江省电力公司丽水供电公司 | A kind of low-voltage network zero line condition checkout gear and method for early warning |
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