CN86202855U - Voltage type protector for electric appliance - Google Patents
Voltage type protector for electric appliance Download PDFInfo
- Publication number
- CN86202855U CN86202855U CN 86202855 CN86202855U CN86202855U CN 86202855 U CN86202855 U CN 86202855U CN 86202855 CN86202855 CN 86202855 CN 86202855 U CN86202855 U CN 86202855U CN 86202855 U CN86202855 U CN 86202855U
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- China
- Prior art keywords
- voltage
- relay
- load
- solid switch
- grid
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- 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.)
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Abstract
The utility model discloses a voltage type protector for electric appliance, which is an improvement of the voltage type protector. The voltage type protector for electric appliance takes the zero line of the mains supply as the reference, which can avoid connecting the earth ground as the reference; when the electric voltage that the housing of electrical equipment towards the ground exceeds the rated value, the control relay of the voltage type protector for electric appliance continues to work to cut off the power supply of a load; in addition, the utility model can be properly added with an overcurrent protection device, a power cord phase wire recognition device, an elimination housing induction electricity device, and an over-voltage/under-voltage protection signal device according to needs. The voltage type protector for electric appliance can send out sound and light to alarm.
Description
A kind of voltage-type electrical equipment protective device belongs to a kind of improvement to the voltage-type earth leakage protective device.
Current mode leakage protector two major types that can be divided into the voltage-type earth leakage protective device and the reaction earth current of reaction pair ground voltage as the earth leakage protective device of electrical equipment protective device; wherein the voltage-type earth leakage protective device with the unusual voltage to earth that occurs on the metal shell of protected equipment or the support as actuating signal; the relay of control load power supply is connected between this shell and the earth; this earth leakage protective device action when this electrical leakage voltage signal surpasses specified action magnitude of voltage (as 36 volts); make dump; so the characteristics of voltage-type electrical equipment protective device are just outages automatically before personnel contact; can avoid leakage current to flow into human body; but the detection of voltage-type protector must be connected to the big ground of benchmark with earth connection; this is difficult to accomplish in ordinary circumstance especially in the family, and this protective device only has outer casing electrification to protect a kind of simple function.
In order to overcome above shortcoming the purpose of this utility model be, utilize zero line in the supply main as benchmark, because its ground connection is good, can satisfy fixing earth resistance requirement, thereby a kind of voltage-type electrical equipment protective device of using earth connection with the zero line in the supply main as detection is provided.
Another purpose of the present utility model provides a kind of overcurrent protective device.
Another purpose of the present utility model provides power line phase line recognition device.
Another purpose of the present utility model provides eliminates the faradic device of electric appliance casing.
Another purpose of the present utility model provides a kind of warning device with usefulness charged as electric appliance casing or warning when breaking down.
A purpose of the present utility model also is to provide a kind of overvoltage and/or under-voltage signal generation device, so that carry out the usefulness of overvoltage and/or under-voltage protection.
A kind of voltage-type electrical equipment protector that the utility model provides, the relay that comprises the control load power supply, feature of the present utility model comprises that the zero line with mains supply is the solid switch of benchmark, the above-mentioned control relay of control, the electrical leakage voltage signal that is added with the shell of load on the control grid (hereinafter to be referred as grid) of this solid switch reaches when above-mentioned control relay is switched on, its normally-closed contact disconnecting consumers power supply, its normally opened contact are added to mains supply phase line voltage the grid of solid switch to keep the solid switch conducting.
Above-mentioned voltage-type electrical equipment protective device provided by the utility model, also can in load, be connected in series overcurrent relay, this relay work when load current surpasses setting, this moment, mains supply phase line voltage was added to the grid of firmware switch through the contact of this relay, made the control relay work of control load power supply cut off load power source.
Voltage-type electrical equipment protector provided by the utility model can also be equipped with civil power phase line recognition device.
Voltage-type electrical equipment protector provided by the utility model also can be equipped with the faradic device of eliminating electric appliance casing.
Voltage-type electrical equipment protector provided by the utility model also can be equipped with overvoltage and/or under-voltage signal generator.
The utility model has the advantages that a kind of improvement to traditional voltage-type protector, do not need to be provided with special-purpose ground wire, and can increase one or more function selectively, its circuit is simple.Can be installed in relevant electrical equipment inside or the plug, cost is not high.
Below in conjunction with accompanying drawing a kind of embodiment of the present utility model is elaborated, wherein
Fig. 1 is the schematic diagram of the circuit of the utility model embodiment.
Fig. 2 is the schematic circuit diagram of a kind of conversion of controllable silicon grid circuit.
Fig. 3 is the schematic circuit diagram of the another kind of conversion of controllable silicon grid circuit.
Fig. 4 is a kind of overvoltage that can install additional and the schematic circuit diagram of under-voltage signal generating circuit.
Referring to Fig. 1, for convenience of description, this figure is the schematic diagram of circuit that has the voltage-type electrical equipment protector of several functions simultaneously.Main circuit comprises solid switch, is that controllable silicon also can be a transistor among the figure, and the negative electrode of controllable silicon TR connects zero-power line, and the silicon controlled anode is through control relay J
1Coil, warning device such as luminescent diode HD or buzzer FM and resistance R
1, diode Z
1A links to each other with phase line of power.The power supply that is added with positive voltage, obvious controllable silicon TR this moment when the positive half cycle of power supply on the controllable silicon TR also can be supplied with by the rectifying device that AC power is carried out rectification.Resistance R
1Can limit the control relay J that flows through
1The optional like this relay lower and relatively sensitiveer of electric current with voltage.With control relay J
1The diode Z that is in parallel
2The capacitor C that can eliminate its back-pressure, is in parallel
1Can smoothly be added to relay J
1On pulsating voltage so that when the power-half cycle, also can keep J
1Energising, end points N is connected on the shell of protected equipment, its electrical leakage voltage over the ground promptly to the voltage of zero line B through resistance R
3Be added on the grid of controllable silicon TR, suitably select resistance R
3Resistance can guarantee that controllable silicon is only in electrical leakage voltage just conducting during greater than operation voltage, to prevent misoperation.This grid is also through resistance R
2With control relay J
1Normally opened contact J
1-3Link to each other normally opened contact J
1-3The other end then link to each other with power supply phase line A.Power supply one end of load is linked zero line B, and an end is through control relay J
1Normally-closed contact J
1-1Link phase line A.So when load is that voltage that the electrical leakage voltage of the shell of electrical equipment is added to controllable silicon TR grid when surpassing specified action voltage surpasses threshold value and makes solid switch controllable silicon TR conducting, control relay J
1In current flowing is arranged, J
1Action, its normally opened contact J
1-3Connect, the voltage of phase line A is through resistance R
2The grid that is added to controllable silicon TR is to keep relay J
1All the time self-insurance is carried out in conducting, and bright, the buzzer FM sounding alarm of light-emitting diode HD illustrates the electric appliance casing electric leakage of using simultaneously.And normally-closed contact J
1-1Disconnect, cut off the electric current of load, to guarantee safety.Button AN among the figure
1Be reset button, after fault is got rid of, press this reset button and can make relay J
1Short circuit in winding, J
1Do not work its normally opened contact J
1-3Disconnect, cut off self-insurance voltage, even thereby button AN
1Unclamp, controllable silicon TR is no longer conducting also, and its normally-closed contact closure recloses load current simultaneously.Button AN
2Be test button, the voltage of phase line A is through resistance R after this button is pressed
2The grid that is added to controllable silicon TR makes its conducting, J
1Work is with hookup operate as normal whether.Solid switch can also be selected bidirectional triode thyristor for use, at this moment diode Z
1Can save.Control relay J
1When cutting off load power source, cutting off phase line as shown in the figure simultaneously, obviously also can increase by a control contact and cut off the zero line of linking in the load simultaneously.
Can install the load over-current protective device additional on this protective device, this device is an overcurrent relay J
2, its winding is connected with load LD, and links control relay J
1Normally-closed contact J
1-1On, overcurrent relay J when load current surpasses setting
2Normally opened contact J
2-1Closure, this contact one end and J
1-1Normally-closed contact links to each other, the other end and J
1-3Normally opened contact and resistance R
2Link to each other.The voltage of power supply phase line A is through control relay J at this moment
1Normally-closed contact J
1-1, overcurrent relay J
2Normally opened contact J
2-1, resistance R
2Be added to the grid of controllable silicon TR, make its conducting, J
1Work, thus make load LD outage.Power source loads can be household electrical appliance or other electrical equipment herein.This overcurrent relay can adopt the relay of reed relay or other types.
Also the phase line recognition device can be housed at this protective device, all conventional phase line identification circuits can use, and that provide among the figure is the simplest a kind of embodiment, and it comprises resistance R
5Or do not draw among the capacitor C(figure), the one end is linked and is checked end M, and its other end is linked the grid of controllable silicon TR.Can test as long as bump the M end points with staff, after phase line is just often touched M point because of electric current is zero, U
MBVoltage is zero, not conducting of controllable silicon TR, if but in case B point is linked phase line, and then staff bumps behind the M end points owing to there being electric current to flow through, U
MBVoltage raises and makes controllable silicon TR conducting, J
1Work and cutting off the power supply is at the trial because R
5The impedance of the resistance of (for example 3.3M Ω) or capacitor C (for example 100pf) is very big thereby be safe to human body.Can take measures to correct when power line is connected with to mistake, prevent to get an electric shock.
Because the electrical leakage voltage that the shell on the electric appliance load is produced because of induction makes people fiber crops electricity, can between this shell N and zero line, connect a capacitor C in order to prevent
2(for example 5100pf) is so that make this induced voltage bypass.Except that and connect and can also again and connect resistance (for example 500K Ω) the electric capacity, also can play good effect.
As a kind of example, the component parameters among Fig. 1 can adopt diode Z
1, Z
2Be 1N4007, resistance R
1Be 12K Ω, 2W, R
2, R
3Be 2M Ω, 1/4W, R
5Be 3.3M Ω, 1/4W, capacitor C
1Be 4.7 μ f, 50V C
2Be 5100pf/2kv, controllable silicon TR is 3CT2KF, control relay J
1Be the JRX-13F(48 volt), overcurrent relay J
2For reed relay JAG-4H, can be by 40 circles/peace coiling, light-emitting diode is BT205, button AN
1, AN
2Be KAX
1Type.Obviously these parameters are done suitably to adjust also to be fine fully.
The operation voltage of this protective device is that 36 volts, operate time are 0.06 second.
Referring to Fig. 2, Fig. 2 is a kind of variation of controllable silicon grid circuit.In resistance R
2With R
3The junction and zero line B between be connected to resistance R
4With the series circuit of variable resistor W, be connected to diode Z between this junction and the controllable silicon grid
4With voltage-stabiliser tube CW
1Series circuit.Change the resistance of variable resistor W, can change the numerical value of outer casing electrification protection operation voltage easily, voltage-stabiliser tube CW
1Mainly be to be used for preventing false triggering.
Referring to Fig. 3, Fig. 3 is the another kind of variation of controllable silicon grid circuit.At resistance R
2With R
3The junction and the controllable silicon grid between be connected with diode Z
3, between grid and negative electrode and be connected to voltage stabilizing didoe CW
2, sheath voltage passes through resistance R
3, diode Z
3Directly be added to the controllable silicon grid, change resistance R
3Resistance just can change the protection magnitude of voltage size, voltage stabilizing didoe CW2 is used for protecting the silicon controlled grid.
Referring to Fig. 4, Fig. 4 is the schematic circuit diagram of this novel a kind of overvoltage that can also install additional and under-voltage protection signal of telecommunication generation device.Its power supply (F point) can be taken among Fig. 1 through resistance R
1Voltage after the step-down, this voltage ratio civil power phase line voltage hang down some and are directly proportional resistance R with it
21And R
22Form bleeder circuit, voltage after partial is added to voltage-stabiliser tube CW3 and resistance R
23Series circuit on, resistance R
23Output through diode Z
5Be added to as the overvoltage signal on the grid g of controllable silicon TR.As supply voltage not conducting of CW3 during, R in normal range (NR)
23Both end voltage is zero, not conducting of controllable silicon TR.This overvoltage signal increases when supply voltage raises, and when surpassing the controllable silicon threshold value, makes controllable silicon TR conducting, control relay J
1Load power source is cut off in work.Change the voltage stabilizing value and the R of CW3 voltage-stabiliser tube
23Resistance just can change the size of overvoltage protection voltage.
Under-voltage signal generation device comprises transistor BG1 and resistance R
24, R
26By divider resistance R
21And R
22Voltage after partial is added to voltage stabilizing didoe CW4 and R
24On the circuit of series connection, resistance R
24On voltage be added between the base stage and emitter of transistor BG1 resistance R
26Be the collector resistance of transistor BG1, the output voltage on this transistor collector is through diode Z
6Be added to the grid g of controllable silicon TR, as under-voltage signal.When supply voltage voltage stabilizing didoe CW4 conducting during, resistance R in range of normal value
24The magnitude of voltage at two ends makes transistor BG1 saturation conduction, output low level (about 0.3 volt) thereby diode Z
6Middle no current flows through not conducting of controllable silicon TR.Not conducting of voltage stabilizing didoe CW4 when supply voltage is lower than normal value, transistor BG1 does not just have the base current input, and transistor BG1 ends, and its collector voltage raises, and can make controllable silicon TR conducting, J
1Work is cut off the electricity supply.Select the voltage stabilizing didoe CW4 and the resistance R of suitable voltage stabilizing value for use
24Resistance just can adjust the size of under-voltage protection voltage.
Overvoltage protection signal generation device and under-voltage protection signal generation device can install additional simultaneously, also can install additional separately.
Claims (8)
1, a kind of voltage-type electrical equipment protector comprises the relay of control load power supply, and feature of the present utility model comprises; Zero line with mains supply is the solid switch of benchmark, the above-mentioned control relay of control, be added with the electrical leakage voltage signal of the shell of load on the grid of this solid switch, and when above-mentioned control relay is switched on, its normally-closed contact cuts off load power source, and its normally opened contact is added to mains supply phase line voltage the grid of solid switch to keep the solid switch conducting.
2, protector as claimed in claim 1, it is characterized in that the overcurrent relay of in load, connecting, this relay work when load current surpasses setting, mains supply phase line voltage is added to the grid of solid switch through the contact of this relay, make control relay work, cut off load power source.
3, protector as claimed in claim 2 is characterized in that above-mentioned overcurrent relay is a reed relay.
4, as claim 1 or 2 or 3 described protectors, its feature comprises civil power phase line recognition device.
5, protector as claimed in claim 4 is characterized in that above-mentioned civil power phase line recognition device is resistance or an electric capacity of linking the solid switch grid.
6,, it is characterized in that between the shell of load and civil power zero line, being connected to the parallel circuits of electric capacity or electric capacity and resistance to eliminate the ac induction voltage of load shell as claim 1 or 2 or 3 described protectors.
7, as claim 1 or 2 or 3 described protectors, it is characterized in that series connection is connected to light-emitting diode or buzzer in the anode circuit of solid switch, do to report to the police and use.
8, as claim 1 or 2 or 3 described protectors; it is characterized in that in solid switch control extremely, being added with the overvoltage signal that produced by the overvoltage signal generating circuit and/or by the under-voltage signal that under-voltage signal generating circuit produced, so that carry out overvoltage and/or under-voltage protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86202855 CN86202855U (en) | 1986-05-06 | 1986-05-06 | Voltage type protector for electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86202855 CN86202855U (en) | 1986-05-06 | 1986-05-06 | Voltage type protector for electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86202855U true CN86202855U (en) | 1987-01-21 |
Family
ID=4806284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86202855 Ceased CN86202855U (en) | 1986-05-06 | 1986-05-06 | Voltage type protector for electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86202855U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256821A (en) * | 2008-12-20 | 2011-11-23 | 法国圣戈班玻璃厂 | Optically active glazing with overvoltage protection |
| CN105098698A (en) * | 2015-09-23 | 2015-11-25 | 杭州华杭电子电器有限公司 | Voltage-type earth leakage protector |
| CN108736459A (en) * | 2018-06-05 | 2018-11-02 | 云南电网有限责任公司普洱供电局 | A kind of charge discharge device of high-tension cable |
| CN109245042A (en) * | 2018-10-31 | 2019-01-18 | 深圳市麦斯杰网络有限公司 | Electric leakage detecting and warning device |
-
1986
- 1986-05-06 CN CN 86202855 patent/CN86202855U/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256821A (en) * | 2008-12-20 | 2011-11-23 | 法国圣戈班玻璃厂 | Optically active glazing with overvoltage protection |
| CN105098698A (en) * | 2015-09-23 | 2015-11-25 | 杭州华杭电子电器有限公司 | Voltage-type earth leakage protector |
| CN105098698B (en) * | 2015-09-23 | 2018-06-19 | 杭州华杭电子电器有限公司 | A kind of voltage-type earth leakage protector |
| CN108736459A (en) * | 2018-06-05 | 2018-11-02 | 云南电网有限责任公司普洱供电局 | A kind of charge discharge device of high-tension cable |
| CN109245042A (en) * | 2018-10-31 | 2019-01-18 | 深圳市麦斯杰网络有限公司 | Electric leakage detecting and warning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |
Termination date: 19870812 |
|
| CE01 | Termination of patent right |