CN2529423Y - Overvoltage earth leakage protective device - Google Patents
Overvoltage earth leakage protective device Download PDFInfo
- Publication number
- CN2529423Y CN2529423Y CN 02206902 CN02206902U CN2529423Y CN 2529423 Y CN2529423 Y CN 2529423Y CN 02206902 CN02206902 CN 02206902 CN 02206902 U CN02206902 U CN 02206902U CN 2529423 Y CN2529423 Y CN 2529423Y
- Authority
- CN
- China
- Prior art keywords
- earth leakage
- circuit
- leakage protective
- mutual inductor
- sequence current
- 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 an overvoltage earth leakage protective device which comprises an earth leakage release(1), an electron module(2) and a main switch(3). The main switch(3) is arranged on the circuit main leads(5,6) which are mutually induced with a zero sequence current mutual inductor(4), voltage measuring circuits(9) are connected between the circuit main leads(5,6), and the voltage measuring circuits(9) and the zero sequence current mutual inductor(4) are mutually induced. The utility model conquers the shortages that the original earth leakage protective devices easily cause the burning and damaging of the electro-products because of lacking the overvoltage protection, reaches the aims of safely electricity using and effective protection, and has simple and masterly protecting structure design.
Description
Technical field
The utility model overvoltage earth leakage protective device relates to the improvement invention of earth leakage protective device.
Background technology
In the prior art; earth leakage protective device is by leakage tripping device, electronic building brick, main switch, zero sequence current mutual inductor; main switch is arranged on power line and is input between the line, is input into line and zero-sequence current interacts, under normal circumstances; pass the inlet wire current of zero sequence current mutual inductor and equate through the size of current that the power supply neutral line is got back in overload; direction is opposite, i.e. vector and be zero, zero sequence current mutual inductor no signal output this moment; release is failure to actuate, and main switch does not trip.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 0.1 second internal cutting off power supply by leakage tripping device, thereby play the earth leakage protective effect.This kind earth leakage protective device plays fairly obvious effect as family expenses and the total lock of mains switch, but function singleness, when supply voltage rises suddenly owing to a variety of causes; usually can burn household electrical appliance; bring loss to the user, sometimes even can lead to fire, existed serious potential safety hazard simultaneously.
Technical scheme
At the defective that prior art exists, the utility model aims to provide the earth leakage protective device that is provided with voltage protection, reaches the purpose of overvoltage protection.
The utility model is finished as follows: comprise leakage tripping device, electronic building brick, main switch, zero sequence current mutual inductor, main switch is arranged on the circuit main line, described zero sequence current mutual inductor and circuit main line are responded to mutually, be connected with voltage between the described circuit main line and survey than circuit, this voltage is surveyed and is responded to mutually with zero sequence current mutual inductor than circuit;
It is piezo-resistance that described voltage is surveyed than circuit.
Press a kind of overvoltage earth leakage protective device of the utility model theme design; only add a thermistor at original earth leakage protective device, simplicity of design is ingenious, and technology is compared only spare and accessory parts of installing more; cost is similar substantially, but practical effect is very practical.Suddenly the high pressure that takes place at circuit is obvious especially especially.
Description of drawings
Fig. 1 is the utility model front view
Execution mode
Description of drawings the utility model structure; below in conjunction with accompanying drawing embodiment is described in further detail: comprise leakage tripping device (1), electronic building brick (2), main switch (3), zero sequence current mutual inductor (4); main switch (3) is arranged on the circuit main line (5,6); described zero sequence current mutual inductor (4) interacts with circuit main line (5,6), and said structure is used the structural principle of earth leakage protective device very widely just now.But the high pressure that circuit is taken place cannot grant asylum; in order to reach this purpose; the utility model is at circuit main line (5; one voltage is set 6) to be surveyed than circuit (9); this voltage is surveyed and is responded to mutually with zero sequence current mutual inductor (4) than circuit (9); this voltage is surveyed and is set in advance a comparative voltage than circuit (9); when the voltage in the circuit is raised to a certain degree; be that dangerous voltage produces; voltage is surveyed will produce the signal of telecommunication than circuit (9); this signal of telecommunication is responded to mutually with zero sequence current mutual inductor (4); zero sequence current mutual inductor (4) will produce the signal of telecommunication and make the main switch tripping operation, and deenergization so just can play the safety guarantee effect to electricity consumption.In order to simplify circuit design, voltage is surveyed than circuit (9) and is adopted piezo-resistance, and the characteristic of piezo-resistance can be fit to the actual requirement of this circuit fully, and design is very simple and practical.
Claims (2)
1. overvoltage earth leakage protective device; comprise leakage tripping device (1), electronic building brick (2), main switch (3), zero sequence current mutual inductor (4); main switch (3) is arranged on the circuit main line (5,6); described zero sequence current mutual inductor (4) is responded to mutually with circuit main line (5,6); it is characterized in that: be connected with voltage between the described circuit main line (5,6) and survey than circuit (9), this voltage is surveyed and is responded to mutually with zero sequence current mutual inductor (4) than circuit (9).
2. a kind of overvoltage earth leakage protective device as claimed in claim 1 is characterized in that: it is piezo-resistance that described voltage is surveyed than circuit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02206902 CN2529423Y (en) | 2002-01-29 | 2002-01-29 | Overvoltage earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02206902 CN2529423Y (en) | 2002-01-29 | 2002-01-29 | Overvoltage earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2529423Y true CN2529423Y (en) | 2003-01-01 |
Family
ID=33688089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02206902 Expired - Fee Related CN2529423Y (en) | 2002-01-29 | 2002-01-29 | Overvoltage earth leakage protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2529423Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392871A (en) * | 2014-11-14 | 2015-03-04 | 华南理工大学 | Residual-current circuit breaker with overvoltage protection function |
| CN104393562A (en) * | 2014-11-14 | 2015-03-04 | 华南理工大学 | Overvoltage and electric leakage integrated protection circuit breaker |
-
2002
- 2002-01-29 CN CN 02206902 patent/CN2529423Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392871A (en) * | 2014-11-14 | 2015-03-04 | 华南理工大学 | Residual-current circuit breaker with overvoltage protection function |
| CN104393562A (en) * | 2014-11-14 | 2015-03-04 | 华南理工大学 | Overvoltage and electric leakage integrated protection circuit breaker |
| CN104393562B (en) * | 2014-11-14 | 2018-02-27 | 华南理工大学 | Overvoltage and electric leakage comprehensive protective circuit breaker |
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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 |