CN204462275U - Low voltage failure charged display device - Google Patents
Low voltage failure charged display device Download PDFInfo
- Publication number
- CN204462275U CN204462275U CN201520048617.0U CN201520048617U CN204462275U CN 204462275 U CN204462275 U CN 204462275U CN 201520048617 U CN201520048617 U CN 201520048617U CN 204462275 U CN204462275 U CN 204462275U
- Authority
- CN
- China
- Prior art keywords
- series circuit
- user
- electrical cable
- resistance
- display device
- 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.)
- Expired - Fee Related
Links
Abstract
Low voltage failure charged display device, it comprises external electrical cable, this electrical cable be connected to table meter and user sky open between electrified body measurement point on, being connected to a RC series circuit in described electrical cable, this RC series circuit also at least being connected one for showing the LED light emitting diode of charged state; On described LED light emitting diode and be connected to one protection diode; Resistance in described RC series circuit selects the chromatic circle resistance being convenient to keep in repair and detect, and electric capacity wherein selects thin-film capacitor; It is simple that it has structure, easy to install and use, and user can be made to pass through to observe electrification display bright light situation, voluntarily detection failure equipment failure judgement type, to reduce user malfunction detection time, improves the features such as repairing work efficiency.
Description
Technical field
The utility model relates to a kind of low voltage failure charged display device detecting user malfunction, belong to technical field of electric power.
Background technology
Electrical equipment malfunction is electric power system fault and user's electrical equipment malfunction two class by property right divisions of responsibility can, user need dial 95598 phones when finding electric power system fault and report for repairment, and user's electrical equipment user must self-maintain when breaking down, also have no right to process even if electric power first-aid personnel reach the spot, looking up the fault point can only be helped.Report statistics for repairment according to the Jiaxing City Nanhu District system failure in 2013, user's electrical equipment malfunction is reported for repairment and is accounted for 70% of total failare quantity.Mainly because user lacks malfunction elimination knowledge and ability, be difficult to failure judgement type.Even if this causes user's electrical equipment malfunction occurs, user also can dial 95598 and report for repairment, causes repairing resource to be taken in a large number, waste.If when there is user's electrical equipment malfunction, user can identify fault type fast, takes correct processing mode.Not only can save the stand-by period that electric power first-aid personnel are on the scene, shorten the malfunction elimination time.The amount of reporting for repairment of user's electrical equipment malfunction can also be made to reduce, can abdicate for electrical equipment fault and more rush to repair passage, while reducing the workload of repair personnel, increase work efficiency.And at present, also do not have a kind of can help user voluntarily detection failure equipment to reduce the device of user malfunction detection time.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art existence, and provide a kind of structure simple, easy to install and use, user can be made to pass through to observe electrification display bright light situation, detection failure equipment failure judgement type voluntarily, to reduce user malfunction detection time, improve the low voltage failure charged display device of repairing work efficiency.
The purpose of this utility model has been come by following technical solution, described a kind of low voltage failure charged display device, it comprises external electrical cable, this electrical cable be connected to table meter and user sky open between electrified body measurement point on, being connected to a RC series circuit in described electrical cable, this RC series circuit also at least being connected one for showing the LED light emitting diode of charged state.
On described LED light emitting diode and be connected to one protection diode; Resistance in described RC series circuit selects the chromatic circle resistance being convenient to keep in repair and detect, and electric capacity wherein selects thin-film capacitor.
After using the utility model, when occurring to have a power failure, user only needs, by observing electrification display bright light situation on inductive switch, to get final product failure judgement type, and take corresponding measure.If lamp is bright, then show that safety at power cut is user's electrical equipment malfunction, user can self-maintain; If lamp does not work, then show that safety at power cut is electrical equipment fault, user can dial 95598 and report for repairment; Through actual test, within user's detection failure time is controlled in 9 minutes.
It is simple that the utility model has structure, easy to install and use, and user can be made to pass through to observe electrification display bright light situation, voluntarily detection failure equipment failure judgement type, to reduce user malfunction detection time, improves the features such as repairing work efficiency.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the impedance characteristic of RC series circuit described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1, a kind of low voltage failure charged display device described in the utility model, it comprises external electrical cable L, N, this electrical cable L, N be connected to table meter and user sky open between electrified body measurement point on, being connected to a RC series circuit in described electrical cable, this RC series circuit also at least being connected one for showing the LED LED 1 of charged state.
Shown in figure, described LED light emitting diode is connected to a protection diode D1; Resistance in described RC series circuit selects the chromatic circle resistance R1 being convenient to keep in repair and detect, and electric capacity C1 wherein selects thin-film capacitor.
Embodiment: shown in Fig. 1, the utility model forms primarily of RC series circuit, LED light emitting diode and a protection diode, wherein:
The electrical equipment model chosen: chromatic circle resistance R1=15K, thin-film capacitor C1=0.027uF, LED 1, protection diode D1 is IN4007.
R1, C1 are composed in series RC series circuit, and in circuit, the electric current that R1 and C1 flows through is identical.
1.RC series circuit current characteristic
(1) current characteristics.Owing to there being the existence of electric capacity, in circuit, can not DC current be flow through, but can alternating current be flow through, so this circuit is used in civil power 50Hz alternating circuit.
(2) overall characteristic.This series circuit has the characteristic that pure resistance is connected and pure capacitor seriesing circuit integrates.When civil power 50Hz alternating current is by this circuit, resistance and electric capacity all also exist inhibition to electric current, and its total impedance is resistance and capacitive reactance sum.
2.RC series circuit impedance operator.
Shown in Fig. 2, be the impedance characteristic of RC series circuit, in figure, x-axis direction is frequency, and y-axis direction is the impedance of this series network.
Can find out from curve, curve changes at frequency f 1 place, and this frequency is called corner frequency, and this RC series circuit only has a corner frequency f1.
Frequency input signal is divided into the impedance analysis that two kinds of situations carry out RC series circuit below:
(1) frequency input signal f>f1 situation.As frequency input signal f>f1, the total impedance of whole RC series circuit is constant, its size equals R1, this is because when frequency input signal height to a certain extent after, the capacitive reactance of electric capacity C1 is little of almost nil, negligible, and the resistance of resistance R1 does not change with frequency change, so now no matter whether frequency is in change, total impedance is constant and be R1.
(2) frequency input signal f<f1 situation.As frequency input signal f<f1, because the frequency of alternating current is low, the capacitive reactance of electric capacity C1 is large, large to the degree can not ignored compared with the value of resistance R1, so now will consider the existence of C1 capacitive reactance.
RC series circuit only has a corner frequency f1, and computing formula is as follows:
f1=1/2πR1C1
In this circuit arrangement, f1=1/2x3.1415926x15000x27x10-9 ≈ 393Hz > 50Hz, therefore in circuit, the capacitive reactance of C1 exists.
The capacitor value X1=1/2 π fC1=1/2 x3.1415926x50x27x10-9 ≈ 118K of C1
I = 220V /( 118k+15K) ≈ 1.7mA
Illustrate: input is greater than diode forward forward voltage, and diode can work, and electric current is little herein, and power consumption is low, about 110 days consumptions 1 degree of electricity.
The electric current that reality multimeter records is 1.71mA;
(2) effect of each electrical equipment:
Finite resistance size of current, the effect play protection circuit, increasing the service life; Also act on dividing potential drop, make device can be directly installed on inlet wire side.Device uses chromatic circle resistance then convenient maintenance and detection.
Thin-film capacitor insulation resistance is high, good heat resistance, and absorption coefficient is little.Have self-healing property and noninductive characteristic, have excellent high-frequency insulation performance, electric capacity and loss angle have nothing to do with frequency in very large frequency range.Device uses thin-film capacitor for reducing noise, increases the service life.
Light emitting diode pipe for showing charged state, to help user's failure judgement classification.When having a power failure, user can observe the corresponding light emitting diode of number, if lamp is bright, is shown to be user side fault, if lamp goes out, is then shown to be electrical equipment fault.
Protection diode shields, and is not damaged for the protection of other electrical equipments in device.
Claims (2)
1. low voltage failure charged display device, it comprises external electrical cable, this electrical cable be connected to table meter and user sky open between electrified body measurement point on, it is characterized in that in described electrical cable, being connected to a RC series circuit, this RC series circuit also at least being connected one for showing the LED light emitting diode of charged state.
2. low voltage failure charged display device according to claim 1, to is characterized in that on described LED light emitting diode and to be connected to a protection diode; Resistance in described RC series circuit selects the chromatic circle resistance being convenient to keep in repair and detect, and electric capacity wherein selects thin-film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520048617.0U CN204462275U (en) | 2015-01-23 | 2015-01-23 | Low voltage failure charged display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520048617.0U CN204462275U (en) | 2015-01-23 | 2015-01-23 | Low voltage failure charged display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204462275U true CN204462275U (en) | 2015-07-08 |
Family
ID=53669144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520048617.0U Expired - Fee Related CN204462275U (en) | 2015-01-23 | 2015-01-23 | Low voltage failure charged display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204462275U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597351A (en) * | 2015-01-23 | 2015-05-06 | 国网浙江省电力公司嘉兴供电公司 | Low-voltage live fault display device |
-
2015
- 2015-01-23 CN CN201520048617.0U patent/CN204462275U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597351A (en) * | 2015-01-23 | 2015-05-06 | 国网浙江省电力公司嘉兴供电公司 | Low-voltage live fault display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103454517A (en) | Method for online monitoring capacitive voltage transformers | |
| CN106058837A (en) | Line arrester leakage current detection device without isolation component | |
| CN201788245U (en) | Online monitor device for service life of arrester with gaps | |
| CN102565696B (en) | Quick measuring device of protective pressing plate and measuring method thereof | |
| CN200944134Y (en) | Three-phase four-wire power supply fault monitoring circuit | |
| CN203562668U (en) | Main district lightning protection distribution box for outdoor LED lighting equipment | |
| CN104483538A (en) | Fine analysis and management device for regional line loss of public transformer region | |
| CN105652107B (en) | A kind of reliability checking method of direct-current transmission converter valve triggering monitoring unit | |
| CN204462275U (en) | Low voltage failure charged display device | |
| CN205176222U (en) | On --spot detection device of flexible direct current transmission change of current valve submodule piece | |
| CN207007960U (en) | A kind of overhead transmission line Zinc oxide arrester monitoring device | |
| CN203522134U (en) | Arc fault protection device | |
| CN204065296U (en) | There is the ring main unit fault-indicating system of anti-misoperation function | |
| CN104597351A (en) | Low-voltage live fault display device | |
| CN204129463U (en) | Hospital's electric intelligentization monitoring energy-saving management system | |
| CN201359629Y (en) | Direct-current power supply grounding alarm device | |
| CN203231469U (en) | Cabinet air conditioner having communication interface lightning protection function | |
| CN203275503U (en) | Universal high-voltage potential indicator | |
| CN202957571U (en) | Electric leakage detection circuit for single-phase power supply of isolated neutral system | |
| CN204945268U (en) | Lightning arrester on-line monitoring circuit | |
| CN204331001U (en) | A kind of three-phase alternating-current supply negative phase sequence failure detector circuit | |
| CN202633805U (en) | Switch cabinet with medium and high voltage potential indicator | |
| CN106711952A (en) | Compound amplification type voltage-stabilizing source with multi-point monitoring and protection coexistence | |
| CN205811512U (en) | A kind of power-off control system | |
| CN2899229Y (en) | Isolated DC supply system |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20210123 |