CN2169234Y - Protector against overvoltage, leakage and shock - Google Patents
Protector against overvoltage, leakage and shock Download PDFInfo
- Publication number
- CN2169234Y CN2169234Y CN 93210387 CN93210387U CN2169234Y CN 2169234 Y CN2169234 Y CN 2169234Y CN 93210387 CN93210387 CN 93210387 CN 93210387 U CN93210387 U CN 93210387U CN 2169234 Y CN2169234 Y CN 2169234Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- protector
- electric shock
- leakage
- voltage
- 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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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a household protector, which comprises a display circuit, a reclosing circuit, a spike voltage circuit and a leakage test function circuit. The utility model is characterized in that the household protector also comprises an executive circuit, an electric shock circuit and an over-voltage protection circuit. When the circuits of the protector are in a normal state, the operating circuits have no power consumption, which is power-saving. If the protector is connected in series with service circuits, not only can the utility model ensure the entire safety of personal and household electrical circuits, but also can play the role of a main switch of power source service circuits.
Description
The utility model relates to the protector that a kind of protector particularly prevents overvoltage, electric leakage, electric shock.
At present, the protector for household electrical appliances in market, its executive component are generally all selected the dropout switch for use, though this element price is low, assembling, debugging require high, and be difficult dustproof, anticorrosion, moistureproof, lacks the reliability and the useful life of work.Protector for household electrical appliances is generally leakproof or overvoltage protector does not have the anti-personnel electric protective device, thereby product function is single, uses inconvenience.
The purpose of this utility model is in order to solve the prior art deficiency, to provide a kind of multi-functional, dependable performance, the protector that prevents overvoltage, electric leakage, electric shock that the life-span is long.
The technical solution of the utility model is to relate to a kind of protector that prevents overvoltage, electric leakage, electric shock; comprise and show and weight combined floodgate circuit that peak voltage circuit and leak test functional circuit is characterized in that also comprising executive circuit; leakage, electric shock circuit and overvoltage crowbar
A, executive circuit are by capacitor C
3, controllable silicon SCR, half-wave rectifier D
6, current-limiting resistance R
2, diode D
5, D
4, capacitor C
2Be formed by connecting with relay J.
B, leakage, electric shock circuit are by a zero-sequence transformer L and a full-wave rectifying circuit D
7, D
8, D
9, D
10Be formed by connecting.
C, overvoltage crowbar are by piezo-resistance R
5, current-limiting resistance R
4With half-wave rectifier D
6Be formed by connecting.
Following utility model is described in detail according to accompanying drawing:
Fig. 1 protector circuit schematic diagram.
Leakage, electric shock signal, leak test circuit signal are by leakage, electric shock electric circuit inspection; The overvoltage signal detects by overvoltage crowbar, more than after two testing circuits finish, carry out to reach to give by executive circuit and think purpose.Show and the reclosing circuit that the peak voltage circuit is by the executive circuit execution.
Fig. 2 protector circuit schematic diagram.
Leakage, electric shock circuit, under less than leakage, electric shock situation, the total magnetic flux of mutual inductor is zero.Under leakage, electric shock situation, the total magnetic flux of mutual inductor is non-vanishing, produces voltage signal after being obtained getting an electric shock by zero-sequence mutual inductance coil L, and this signal has D
7, D
8, D
9, D
10Carry out full-wave rectification in four diodes, then to C
3Charging, when voltage rises to the trigger voltage of controllable silicon SCR, the controllable silicon conducting, civil power is earlier with D
6Halfwave rectifier is then by controllable silicon SCR, R
2, D
5, D
4To C
2Charging.Work as C
2On voltage during to the pick-up voltage of J, relay carries out the adhesive action.J
1And J
2Central point leave normally-closed contact simultaneously and advance to normally opened contact.In the traveling process, controllable silicon is owing to deenergization cuts out, and the electric shock personnel are owing to deenergization breaks away from power supply.This moment, C was depended in the action of relay
2Discharge is finished.When the moment that controllable silicon is connected, relay obtains higher voltage, is swift in motion thereby make.R
2Play metering function, to prevent controllable silicon and C
2Damage.After relay sucted, power supply passed through C
1D is passed through in step-down
1, D
2, D
3, D
4Direct voltage after rectification, the rectification is about 1/2 of a relay rated voltage, thereby even protector is locked in guard mode, makes protector keep low-power consumption in working order down again.Direct current relay has the release voltage of a maximum, as long as coil voltage is higher than this value, relay just can not discharge.
Overvoltage crowbar, when supply voltage raise above 270 volts to 500 volts, promptly general household electrical appliance all had the danger of being burnt, at first piezo-resistance R
5Conducting is through R
4Current limliting and D
6Halfwave rectifier is to C
3Charging, C
3On voltage after the controllable silicon trigger voltage, the controllable silicon conducting.Later process is the same, and different is that according to the condition of work of this protector, added dc coil voltage is rated operational voltage on the relay at this moment.
Show and the reclosing circuit that this protector is equipped with the switch of a tape light, when protector enters guard mode, K switch
1Tripod can pass through R
1And J
1The contact is connected with zero line, makes K
1Two, the lamp between the tripod ignites.Also can provide light source at night, be convenient to the operation that the user carries out reclosing.The light of indicator light strong and weak can also judge qualitatively touch, leak current fault still is the overvoltage fault, reclosing is to utilize K
1Disconnect and make relay break away from power supply and make normally closed closure, thereby serve power supply again.If at fault or get an electric shock when not breaking away from power supply as yet, close a floodgate again, circuit still is in off-state.
The peak voltage circuit relies on 470 volts of piezo-resistance R
6, and time constant T=0.45R
2C
2, the peak voltage time is very short, is not enough to cause circuit operation, thereby normally-closed contact maintenance normally off, and peak voltage passes through R
6Absorbed.Absorb all kinds of surge voltages in lightning induction high pressure and the electrical network effectively by the peak voltage circuit.
The leak test functional circuit is by K
2And R
7The circuit of forming, thereby whether finish the test leakage function normal.When pressing K
2The time, being equivalent to simulate the situation of human electric shock or electrical leakage, this moment, protector should move, otherwise, illustrate that protector itself has fault.
The utility model has following advantage compared to existing technology:
1, relay is when normal electrical network, it is operated in under-voltage condition, when relay arrives rated value, make it obtain maximum pick-up voltage, utilize the different qualities of the maximum pick-up voltage of relay and minimum release voltage to solve the property taken into account of electric leakage, electric shock working condition and overvoltage working condition.
2, small-sized high-power, sealed type direct current relay, strict assembling and debug its dependable performance in circuit, movement response is fast, the time is accurate, anti-interference, shock resistance, dustproof anticorrosive and increase the service life.
3, in zero-sequence transformer, magnet ring adopts amorphous metallic material, and magnetic permeability is high especially, thereby has improved the sensitivity of protector greatly.
4, the user is serially connected in protector in the circuit of registering one's residence and can insures personal safety, household electrical appliance, also can play the register one's residence effect of master switch of power supply.
Claims (2)
1, a kind of protector that prevents overvoltage, electric leakage, electric shock comprises showing and the reclosing circuit that peak voltage circuit and leak test functional circuit is characterized in that also comprising executive circuit, electric leakage, electric shock circuit and overvoltage crowbar,
The a executive circuit is by capacitor C
3, controllable silicon SCR, half-wave rectifier D
6, current-limiting resistance R
2, diode D
5, D
4, capacitor C
2Be formed by connecting with relay J,
B electric leakage, electric shock circuit are by a zero-sequence transformer L and a full-wave rectifying circuit D
7, D
8, D
9, D
10Be formed by connecting,
The c overvoltage crowbar is by piezo-resistance R
5, current-limiting resistance R
4With half-wave rectifier D
6Be formed by connecting.
2, protector according to claim 1, the executive component that it is characterized in that executive circuit are a kind of small-sized high-power, sealed type direct current relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210387 CN2169234Y (en) | 1993-04-23 | 1993-04-23 | Protector against overvoltage, leakage and shock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210387 CN2169234Y (en) | 1993-04-23 | 1993-04-23 | Protector against overvoltage, leakage and shock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2169234Y true CN2169234Y (en) | 1994-06-15 |
Family
ID=33792304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93210387 Expired - Fee Related CN2169234Y (en) | 1993-04-23 | 1993-04-23 | Protector against overvoltage, leakage and shock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2169234Y (en) |
-
1993
- 1993-04-23 CN CN 93210387 patent/CN2169234Y/en not_active Expired - Fee Related
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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 |