CN2222408Y - Domestic electric power protector - Google Patents
Domestic electric power protector Download PDFInfo
- Publication number
- CN2222408Y CN2222408Y CN 94229513 CN94229513U CN2222408Y CN 2222408 Y CN2222408 Y CN 2222408Y CN 94229513 CN94229513 CN 94229513 CN 94229513 U CN94229513 U CN 94229513U CN 2222408 Y CN2222408 Y CN 2222408Y
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- CN
- China
- Prior art keywords
- coil
- circuit
- current
- energy meter
- electric energy
- 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
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Abstract
The utility model relates to a domestic electric power protector. The zero order mutual inductor secondary coils of an electric energy meter current coil and a voltage coil send electric leakage and stealing signals to an electric power controlling circuit. After the electric leakage and stealing signals are compared and enlarged, a load electric source switch is controlled through a trip coil installed in the utility model. Load overcurrent and electric source overvoltage signals respectively sample and output one voltage through a rectifying filter circuit and a potentiometer. A voltage stabilizing tube is controlled, and the electric power controlling circuit connected with the voltage stabilizing tube and the trip coil control the load electric source switch. The current and the voltage coil incoming line ends of the electric energy meter are connect to a fire line end. Short-circuit lines are arranged between the zero line incoming line end of the electric source and the outgoing line end of the voltage coil, and the short-circuit lines pass through the zero order mutual inductor. Therefore, the utility model has the functions of metering, leak prevention, electric stealing prevention, overcurrent protection and overvoltage protection.
Description
The utility model relates to a kind of household power protector, can be used as the household safe power device, can measure, and prevents leak-stopping (touching), stealing and makes overcurrent, overvoltage protection.
At present, household appliance protecting device is more, but the function singleness that has, what have can not measure, the sensitivity that has, stability, poor reliability.
The purpose of this utility model is: the household power protector that designs the metering of a kind of energy, leakproof, stealing and overcurrent, overvoltage protection.
The utility model is to realize its purpose like this: it has a metering electric energy meter, and the current coil of its electric energy meter and potential winding are provided with zero-sequence transformer T
1, its secondary coil L
2The leakage of taking, stealing signal are sent into control circuit power, after comparing, amplifying, by being connected to the trip coil L control load R in the control circuit power
LMains switch K, load R
LThe overvoltage signal that the over-current signal of last generation, power supply produce respectively behind its current rectifying and wave filtering circuit rectifying and wave-filtering, potentiometer W
1, W
2Sampling output control voltage-stabiliser tube DW, voltage-stabiliser tube DW output control control circuit power is by trip coil L control load R
LMains switch K, current coil, potential winding end of incoming cables are connected to short-circuit line between the zero-power line end of potential winding leading-out terminal and electric energy meter, and pass zero-sequence transformer T with the live wire end of incoming cables that is connected to electric energy meter
1
The utility model can also be realized its purpose like this: control circuit power is by integrated circuit block M54123L, and the control utmost point is connected to the thyristor SCR and the D of M54123L output
11-D
14Bridge rectifier and R that rectifier diode constitutes
6, C
8The filter circuit that constitutes connects and forms, and voltage-stabiliser tube DW output is connected to the control of thyristor SCR and extremely goes up, and the control of thyristor SCR output signal is connected to D
11-D
14Trip coil L on the rectification circuit input end also is connected to piezo-resistance My on the trip coil L.
The utility model carries out the current rectifying and wave filtering circuit of rectifying and wave-filtering respectively by D to overcurrent, overvoltage signal
1-D
4And D
5-D
8The bridge rectifier that rectifier diode constitutes and by C
1, R
1And R
4, C
5The filter circuit that constitutes connects and forms D
1-D
4Rectification circuit input end and over-current detection instrument transformer T
2Secondary coil L
4Link instrument transformer T
2Primary coil L
8Link D with the leading-out terminal of the current coil of electric energy meter
5-D
8The input of rectification circuit links by electric energy meter and power supply.
Overcurrent sampling potentiometer W of the present utility model
1Output is connected to R
3, C
3The delay circuit that constitutes, D
5-D
8Rectification circuit input end is connected to piezo-resistance My.
Load R of the present utility model
LWith zero-sequence transformer T
1Between be connected to testing coil L
1With test button S.
Because the utility model adopts the said structure design, during normal electricity consumption, pass zero-sequence transformer T
1Live wire and ground wire (size of current of center line equates that direction is opposite, its current phasor and be zero, then its secondary coil L
2Middle influence electricity miscarriage is given birth to, the M54123L Triggerless output of control circuit power, and not conducting of thyristor SCR, no current passes through among the trip coil L, and electric energy meter normally measures.Its each function realizes that principle is as follows: electricity filching person generally adopts removes the potential winding hook, the short circuit current coil, electric energy meter turnover line is exchanged, method stealings such as zero line ground connection, when adopting the stealing of dismounting potential winding hook, because of potential winding and current coil with being connected on the electric energy meter live wire end of incoming cables, electric energy meter still can operate as normal, does not influence metering.When adopting the current coil short electricity-filching, then load current directly enters load by short-circuit line, passes zero-sequence transformer T through the potential winding leading-out terminal 4 of electric energy meter
1Constitute the loop to electric energy meter 3 terminations, make and pass T
1Current phasor and non-vanishing, secondary coil L then
2The middle induced current that produces after M54123L relatively amplifies, triggers thyristor SCR, has electric current to pass through among the trip coil L, thus control load R
LMains switch K, cut off the electricity supply.When adopting electric energy meter turnover line to exchange stealing, make the electric energy meter counter-rotating, pass zero-sequence transformer T
1In current phasor and non-vanishing, thereby through secondary L
2, by making thyristor SCR conducting after M54123L comparison, the amplification, there is electric current to flow through among the trip coil L, mains switch K is cut off the electricity supply.When adopting the stealing of zero line earthing, generally be that electric energy meter live wire and zero line are exchanged, opposite with normal wiring, and then establish region, current coil and load R at this moment
LDisconnect, no current flows through, and electric energy meter is not worked and reached stealing.As long as electricity filching person is with zero line ground connection, electric current passes T through electric energy meter 1 termination
1Arrive load R with electric energy meter 2 terminations
LConstitute loop, T with the earth
1Middle current phasor and non-vanishing has current flowing thereby make among the trip coil L, cuts off the electricity supply.
When occurring getting an electric shock, be equivalent to have leakage current directly to leak to the earth from live wire, reflux without center line, cause live wire and current in middle wire not to wait T
1Middle current phasor and non-vanishing, thereby through L
2, M54123L triggers thyristor SCR, by trip coil L control mains switch K, cuts off the electricity supply, the protection personal safety avoids accident to take place.
When load R occurring
LMiddle power is too high, short circuit, and when forming overcurrent, perhaps because mains fluctuations cause overvoltage, then overcurrent and overvoltage signal are exported through current rectifying and wave filtering circuit separately, at potentiometer W
1And W
2Centre cap produces the voltage sampling of certain numerical value, makes the conducting of voltage-stabiliser tube DW reverse breakdown, and the thyristor SCR conducting that links with it is triggered; there is electric current to flow through among the trip coil L; thereby control mains switch K cuts off the electricity supply, protection household electrical appliance operate as normal.
Delay circuit is used to prevent that household electrical appliance from starting the excessive and misoperation of transient current.Piezo-resistance My, when line voltage just often, be equivalent to a little electric capacity, filtering electrical network clutter is eliminated the effect of electrical network transient pulse, makes electric power protection device steady operation.
Therefore, this protector can be realized preventing various leakages (touching), stealing, can be measured and carry out overcurrent, overvoltage protection, and function is many and stability is better.
Further described below in conjunction with embodiment and accompanying drawing.
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the utility model circuit structure diagram;
As shown in FIG., this protector has the electric energy meter 5 of a structure and normal domestic use electric energy meter analog structure, and a zero-sequence transformer T is housed in the electric energy meter 5
1, do leakage, stealing sampling, the current coil 6 and the potential winding 7 of electric energy meter 5 pass zero-sequence transformer T
1, zero-sequence transformer T
1Secondary coil L
2Link with control circuit power, control circuit power is by the integrated circuit block M54123L with comparison, enlarging function, the control utmost point and M54123L exports joining thyristor SCR and by D
11-D
14The bridge rectifier that four rectifier diodes constitute and by R
6, C
9The filter circuit that constitutes connects and forms, and the control of thyristor SCR output signal is connected to the trip coil L in the control circuit power, promptly when leakage (touching), stealing occurring, and zero-sequence transformer T
1Middle current phasor and non-vanishing through M54123L relatively, after the amplification, triggers thyristor SCR conducting, has electric current to flow through among the trip coil L, thus control load R
LMains switch K cuts off the electricity supply.As load R
LWhen overvoltage appears in middle generation overcurrent or supply voltage, after its signal carries out rectifying and wave-filtering by its rectification, filter circuit respectively, through potentiometer W
1And W
2The voltage-stabiliser tube DW that the control of sampling output certain voltage links with it, voltage-stabiliser tube DW output links with the control circuit power thyristor SCR control utmost point, equally by trip coil L control load R
LThe mains switch action.The current rectifying and wave filtering circuit of overcurrent, overvoltage signal is respectively by D
1-D
4And D
5-D
8The bridge rectifier that each four rectifier diode constitutes and by C
1, R
1And R
4, C
5The filter circuit that constitutes connects and forms D
1-D
4The input of rectification circuit and over-current detection instrument transformer T
2Secondary coil L
4Link instrument transformer T
2Primary coil L
3Link D with the leading-out terminal 2 of the current coil 6 of electric energy meter 5
5-D
8The input of rectification circuit links by electric energy meter 5 and power supply.At overcurrent sampling potentiometer W
1Be connected to by R in the output
3, C
3The delay circuit that constitutes prevents the misoperation because the household electrical appliance transient current is excessive, at D
5-D
8Be connected to piezo-resistance My respectively on rectification circuit input end and the trip coil L,, ensure the protector job stability with the pulse of filtering electrical network.In order to test, at load R
LWith zero-sequence transformer T
1Between be connected to testing coil L
1With test button S.The current coil 6 of electric energy meter 5 and the end of incoming cables of potential winding 7 are connected to short-circuit line 8 between the leading-out terminal 4 of potential winding 7 and the zero-power line end 3 of electric energy meter 5, and pass zero-sequence transformer T with being connected on the live wire end of incoming cables 1 of electric energy meter 5
1Potentiometer W
1, W
2Through diode D
9, D
10Control voltage-stabiliser tube DW, each element is all commercially available in the circuit, and also the element of available similar performance is replaced.
Claims (5)
1, a kind of household power protector is characterized in that: current coil (6) of its electric energy meter (5) and potential winding (7) design have zero-sequence transformer T
1, its secondary coil L
2The leakage of taking, stealing signal are sent into control circuit power, after comparing, amplifying, by being connected to trip coil L control load R wherein
LMains switch K, load R
LThe over-current signal of last generation, the overvoltage signal that power supply produces are respectively by behind the rectifying and wave-filtering of its current rectifying and wave filtering circuit, through potentiometer W
1, W
2Sampling output control voltage-stabiliser tube DW, voltage-stabiliser tube DW output control control circuit power is by trip coil L control load R
LMains switch K, the end of incoming cables of current coil (6) and potential winding (7) is connected to the live wire end of incoming cables (1) of electric energy meter (5) altogether, be connected to short-circuit line (8) between the leading-out terminal (4) of potential winding (7) and the zero-power line end (3) of electric energy meter (5), and pass zero-sequence transformer T
1
2, household power protector according to claim 1 is characterized in that: control circuit power is by integrated circuit block M54123L, and the control utmost point is connected to the thyristor SCR of M54123L output and by D
11-D
14The bridge rectifier that rectifier diode constitutes and by R
6, C
9The filter circuit that constitutes connects and forms, and voltage-stabiliser tube DW output links with the control utmost point of thyristor SCR, and the control of thyristor SCR output signal is connected to D
11-D
14The trip coil L of rectification circuit input end is connected to piezo-resistance My on the trip coil L.
3, household power protector according to claim 1 is characterized in that: overcurrent, overvoltage signal are carried out the current rectifying and wave filtering circuit of rectifying and wave-filtering respectively by D
1-D
4And D
5-D
8The bridge rectifier that rectifier diode constitutes and by C
1, R
1And R
4, C
5The filter circuit that constitutes connects and forms D
1-D
4Rectification circuit input end and over-current detection instrument transformer T
2Secondary coil L
4Link instrument transformer T
2Primary coil L
3Link D with the leading-out terminal (2) of the current coil (6) of electric energy meter (5)
5-D
8The input of rectification circuit links by electric energy meter (5) and power supply.
4, according to claim 1,3 described household power protectors, it is characterized in that: at overcurrent sampling potentiometer W
1Output is connected to R
3, C
3The delay circuit that constitutes is at D
5-D
8Rectification circuit input end is connected to piezo-resistance My.
5, household power protector according to claim 1 is characterized in that: load R
LWith zero-sequence transformer T
1Valve be connected to testing coil L
1With test button S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94229513 CN2222408Y (en) | 1994-08-18 | 1994-08-18 | Domestic electric power protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94229513 CN2222408Y (en) | 1994-08-18 | 1994-08-18 | Domestic electric power protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2222408Y true CN2222408Y (en) | 1996-03-13 |
Family
ID=33841826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94229513 Expired - Fee Related CN2222408Y (en) | 1994-08-18 | 1994-08-18 | Domestic electric power protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2222408Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515928A (en) * | 2013-10-22 | 2014-01-15 | 无锡华阳科技有限公司 | Indirect type thermal overload protection device |
-
1994
- 1994-08-18 CN CN 94229513 patent/CN2222408Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515928A (en) * | 2013-10-22 | 2014-01-15 | 无锡华阳科技有限公司 | Indirect type thermal overload protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |