CN2671196Y - Leakage protector with voltage monitoring control - Google Patents
Leakage protector with voltage monitoring control Download PDFInfo
- Publication number
- CN2671196Y CN2671196Y CN 200320115986 CN200320115986U CN2671196Y CN 2671196 Y CN2671196 Y CN 2671196Y CN 200320115986 CN200320115986 CN 200320115986 CN 200320115986 U CN200320115986 U CN 200320115986U CN 2671196 Y CN2671196 Y CN 2671196Y
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- voltage
- protection circuit
- output end
- leakage protector
- circuit
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Abstract
The utility model provides a leakage protector with a voltage monitoring control. The utility model adds an over-voltage protection circuit in the leakage protector. When the voltage entering user exceeds a certain number (such as 260V ), the circuit outputs an earth current which is about 35mA, the leakage protector is forced to trip and be protected, and therefore, various electric appliances are not be damaged because of the sudden increase of voltage. The relay of the over-voltage protection circuit is connected between the positive output end and the negative output end of the rectifying filter circuit, and the positive output end and the negative output end of the rectifying filter circuit are connected with a capacitance in parallel simultaneously. The input end of the over-voltage protection circuit as the load of the leakage protection circuit is connected with the output end of the leakage protection circuit. The leakage protector with voltage monitoring control provided by the utility model has simple structure and stromg practicability, and the leakage protector with voltage monitoring control is installed in the electric distribution box. The exiting wiring structure in room is not altered, the electric consumption is low, and the damage to electric appliances because of abnormal voltage can be prevented efficiently.
Description
Technical field:
The utility model relates to a kind of power supply emergency protective device, designs a kind of earth leakage protective device that has voltage monitoring specifically.
Background technology:
Various household electrical appliance are more and more in the Modern Family.The supply voltage that general household electrical appliances use is single-phase 220V, when supply voltage rises suddenly for a certain reason (the improper 380V of the causing voltage of distribution box zero line contact as building seals in suddenly), then all household electrical appliance that do not take out in the attaching plug use, will damage because of supply voltage raises, even lead to fire, cause irremediable heavy loss.Use the user of earth leakage protective device more and more now in the family.Earth leakage protective device is made up of leakage tripping device, electronic building brick, main switch, zero sequence current mutual inductor; under normal circumstances pass the inlet wire current of zero sequence current mutual inductor and get back to the size of current equal direction of the power supply neutral line opposite through overload; be vector and be zero; zero sequence current mutual inductor no signal output this moment, release is failure to actuate.When electric shock or leak current fault, pass the inlet wire current of zero sequence current mutual inductor and get back to power supply neutral current size unequal through overload, it is vector and when non-vanishing, zero sequence current mutual inductor just has induced voltage to produce, this voltage amplifies through integrated circuit, after reaching setting value, make automatic switch at a few tens of milliseconds internal cutting off power supply by leakage tripping device.Briefly, if when the live wire in the load produces electric current and surpasses certain numerical value ground wire (the family expenses earth leakage protective device is 30mA), with regard to trip protection.
Trip protection when but this earth leakage protective device has only its load generation electric shock or electric leakage is inoperative when supply voltage rises suddenly owing to a variety of causes, so its function is more single.
Summary of the invention:
The purpose of this utility model provides a kind of earth leakage protective device that has voltage monitoring.It increases an overvoltage crowbar in earth leakage protective device; when the voltage of registering one's residence surpasses a certain numerical value (as 260V); an about 35mA of circuit output to earth-current, force earth leakage protective device moment trip protection, thereby protect indoor various electrical equipment not to be damaged because of jumping of voltage.
The purpose of this utility model is achieved through the following technical solutions: a kind of earth leakage protective device that has voltage monitoring, comprise shell, wiring bayonet socket and leakage protection circuit, it is characterized in that also including in the described shell overvoltage crowbar, comprise power transformer, current rectifying and wave filtering circuit and relay, relay is connected between the positive-negative output end of current rectifying and wave filtering circuit, and the positive-negative output end of current rectifying and wave filtering circuit is parallel with an electric capacity simultaneously; This overvoltage crowbar is as the load of leakage protection circuit, and its input links to each other with the output of leakage protection circuit.
According to the characteristic of relay, when the actuating coil of relay adds certain voltage V
1After, armature adhesive normally open contact changes normally off into.When the voltage of actuating coil reduces to V
2After, armature discharges, and normally open contact returns to normally open.Therefore when supply voltage was 220V, the voltage of transformer secondary was lower than the pick-up voltage of relay behind rectifying and wave-filtering, and relay is not worked.In case external voltage is higher than a certain numerical value (as 260V), the secondary voltage of transformer is higher than the pick-up voltage of relay behind rectifying and wave-filtering, relay work.The electric current of a 35mA of its contact output.And this device moves earth leakage protective device as a load of earth leakage protective device in a few tens of milliseconds, cuts off the input power supply, forms overvoltage protection.The circuit working principle of this device is to utilize the characteristic of earth leakage protective device, instead its road and use it.
The earth leakage protective device that has a voltage monitoring provided by the utility model is simple in structure, practical, is installed in the distribution box, does not change existing room wire structures, and power consumption is low, can prevent the damage of electric voltage exception to electrical equipment effectively.
Description of drawings:
Fig. 1 is the structural representation that originally has the earth leakage protective device of voltage monitoring.
Fig. 2 is the circuit diagram that originally has the earth leakage protective device of voltage monitoring.
1-shell wherein; 2-test button; 3-switch; 4-wiring bayonet socket; 5-indicator light.
Embodiment:
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Contour structures of the present utility model as shown in Figure 1.Shell 1 is identical with existing earth leakage protective device, has test button 2, switch 3 on its panel.In shell, except existing leakage protection circuit, also include an overvoltage crowbar.As shown in Figure 2, this circuit comprises power transformer, current rectifying and wave filtering circuit and relay, and relay is connected between the positive-negative output end of current rectifying and wave filtering circuit, and the positive-negative output end of current rectifying and wave filtering circuit is parallel with an electric capacity simultaneously; This overvoltage crowbar is as the load of leakage protection circuit, and its input links to each other with the output of leakage protection circuit.
The relay indicating light 5 that also has an overvoltage crowbar on the panel of shell 1.
Claims (2)
1. earth leakage protective device that has voltage monitoring, comprise shell, wiring bayonet socket and leakage protection circuit, have test button and switch on the panel of shell, it is characterized in that also including in the described shell overvoltage crowbar, comprise power transformer, current rectifying and wave filtering circuit and relay, relay is connected between the positive-negative output end of current rectifying and wave filtering circuit, and the positive-negative output end of current rectifying and wave filtering circuit is parallel with an electric capacity simultaneously; This overvoltage crowbar is as the load of leakage protection circuit, and its input links to each other with the output of leakage protection circuit.
2. the earth leakage protective device that has voltage monitoring according to claim 1 is characterized in that also having on the panel of shell the relay indicating light of an overvoltage crowbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115986 CN2671196Y (en) | 2003-11-20 | 2003-11-20 | Leakage protector with voltage monitoring control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115986 CN2671196Y (en) | 2003-11-20 | 2003-11-20 | Leakage protector with voltage monitoring control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2671196Y true CN2671196Y (en) | 2005-01-12 |
Family
ID=34475334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320115986 Expired - Fee Related CN2671196Y (en) | 2003-11-20 | 2003-11-20 | Leakage protector with voltage monitoring control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2671196Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018188364A1 (en) * | 2017-04-12 | 2018-10-18 | 中山市开普电器有限公司 | Electromagnetic leakage protection circuit |
-
2003
- 2003-11-20 CN CN 200320115986 patent/CN2671196Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018188364A1 (en) * | 2017-04-12 | 2018-10-18 | 中山市开普电器有限公司 | Electromagnetic leakage protection circuit |
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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 |